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Conductivity control of semiconducting silicides by composition ratios and formation of homojunction solar cells on glass substrates

Research Project

Project/Area Number 18H03767
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 21:Electrical and electronic engineering and related fields
Research InstitutionUniversity of Tsukuba

Principal Investigator

Suemasu Takashi  筑波大学, 数理物質系, 教授 (40282339)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥34,450,000 (Direct Cost: ¥26,500,000、Indirect Cost: ¥7,950,000)
Fiscal Year 2020: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Fiscal Year 2019: ¥11,700,000 (Direct Cost: ¥9,000,000、Indirect Cost: ¥2,700,000)
Fiscal Year 2018: ¥13,260,000 (Direct Cost: ¥10,200,000、Indirect Cost: ¥3,060,000)
Keywords太陽電池 / 光吸収 / pn接合 / エネルギー変換効率 / 欠陥 / 空孔 / 界面層 / 蓄積 / 再結合 / バリウムシリサイド / 伝導型制御 / パッシベーション / 第一原理計算 / シリサイド半導体 / 化学量論 / 不純物ドーピング / ストイキオメトリー
Outline of Final Research Achievements

Barium disilicide (BaSi2) is one of the emerging materials for solar cell applications. It has a large absorption coefficient and a suitable band gap of 1.3 eV. In the past, p-BaSi2/n-Si heterojunction solar cells have been achieved. However, photons absorbed in the n-Si side contribute mostly to photocurrents. In this work, we achieved the first demonstration of BaSi2-pn homojunction solar cells and n-ZnO/p-BaSi2 heterojunction solar cells, wherein photogenerated carriers in the BaSi2 layers contribute mostly to the photocurrent.
We have also investigated defects in BaSi2 films. According to first-principles calculations, Si vacancies are most likely to form. We found by experiment that these defects are inactivated by atomic hydrogen doping, and the mechanism of inactivations is clarified based on first-principles studies. We further developed the BaSi2 thin-film growth technique by sputtering, and demonstrated the first operation of n-BaSi2/p-Si solar cells.

Academic Significance and Societal Importance of the Research Achievements

半導体バリウムシリサイド(BaSi2)は資源が豊富な元素で構成され、光吸収係数および禁制帯幅の視点で、太陽電池に適した新しい材料である。本研究において、BaSi2ホモ接合太陽電池の動作に成功したことは、既存の結晶Si太陽電池とのタンデム化により、資源が豊富な元素のみで構成されるSiベースの半導体においても、エネルギー変換効率30%超を狙える可能性が拓けるため、意義深いといえる。また、大面積薄膜の堆積に適したスパッタ法を用いて太陽電池動作を実証したことも重要な成果である。学術的には、BaSi2中の空孔型欠陥を水素で不活性化できること、また、その機構を明らかにした点に意義がある。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (63 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (8 results) Journal Article (30 results) (of which Int'l Joint Research: 11 results,  Peer Reviewed: 30 results,  Open Access: 1 results) Presentation (20 results) (of which Int'l Joint Research: 19 results,  Invited: 5 results) Remarks (2 results) Patent(Industrial Property Rights) (3 results)

  • [Int'l Joint Research] Universiti Kebangsaan Malaysia(マレーシア)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Balarusian State Univ. Inf. Raidoelect.(ベラルーシ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Delft University of Technology(オランダ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Belarusian State Univ. Inf. Radioele.(ベラルーシ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Delft University of Technology(オランダ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Belarusian State Univ.(ベラルーシ)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Delft University of Technology(オランダ)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] University Grenoble Aples(フランス)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Comparison of C doping technique between SiC and C targets for high-photoresponsivity BaSi2 films by radio-frequency sputtering2021

    • Author(s)
      Taira Nemoto, Ryota Koitabashi, Masami Mesuda, Kaoru Toko, Takashi Suemasu
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 60 Issue: 5 Pages: 058001-058001

    • DOI

      10.35848/1347-4065/abf317

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Mechanisms of carrier lifetime enhancement and conductivity-type switching on hydrogen-incorporated arsenic-doped BaSi22021

    • Author(s)
      Sho Aonuki, Zhihao Xu, Yudai Yamashita, Kazuhiro Gotoh, Kaoru Toko, Noritaka Usami, Andrew B. Filonov, Siarhei A. Nikitsiuk, Dmitri B. Migas, Denis A. Shohonov, Takashi Suemasu
    • Journal Title

      Thin Solid Films

      Volume: 724 Pages: 138629-138629

    • DOI

      10.1016/j.tsf.2021.138629

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Effect of post-annealing on the significant photoresponsivity enhancement of BaSi2 epitaxial films on Si(111)2021

    • Author(s)
      Yurika Haku, Sho Aonuki, Yudai Yamashita, Kaoru Toko, Takashi Suemasu
    • Journal Title

      Applied Physics Express

      Volume: 14 Issue: 2 Pages: 021003-021003

    • DOI

      10.35848/1882-0786/abdc9f

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Formation of high-photoresponsivity BaSi2 films on glass substrate by radio-frequency sputtering for solar cell applications2021

    • Author(s)
      Ryota Koitabashi, Taira Nemoto, Yudai Yamashita, Masami Mesuda, Kaoru Toko, Takashi Suemasu
    • Journal Title

      Journal of Physics D: Applied Physics

      Volume: 54 Issue: 13 Pages: 135106-135106

    • DOI

      10.1088/1361-6463/abd434

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Solar cell operation of sputter-deposited n-BaSi2/p-Si heterojunction diodes and characterization of defects by deep-level transient spectroscopy2021

    • Author(s)
      Taira Nemoto, Sho Aonuki, Ryota Koitabashi, Yudai Yamashita, Masami Mesuda, Kaoru Toko and Takashi Suemasu
    • Journal Title

      Applied Physics Express

      Volume: 14 Issue: 5 Pages: 051010-051010

    • DOI

      10.35848/1882-0786/abfb87

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Impact of radio-frequency power on the photoresponsivity enhancement of BaSi2 films formed by sputtering2020

    • Author(s)
      Taira Nemoto, Ryota Koitabashi, Masami Mesuda, Kaoru Toko, Takashi Suemasu
    • Journal Title

      Applied Physics Express

      Volume: 13 Issue: 8 Pages: 085511-085511

    • DOI

      10.35848/1882-0786/aba9a1

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fabrication of high-photoresponsivity BaSi2 films formed on conductive layers by radio-frequency sputtering2020

    • Author(s)
      Ryota Koitabashi, Taira Nemoto, Masami Mesuda, Kaoru Toko, Takashi Suemasu
    • Journal Title

      Applied Physics Express

      Volume: 13 Issue: 7 Pages: 075506-075506

    • DOI

      10.35848/1882-0786/ab9622

    • NAID

      120007169667

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Atomic hydrogen passivation for photoresponsivity enhancement of boron-doped p-BaSi2 films and performance improvement of boron-doped p-BaSi2/n-Si heterojunction solar cells2020

    • Author(s)
      Zhihao Xu, Takuma Sato, Louise Benincasa, Yudai Yamashita, Tianguo Deng, Kazuhiro Gotoh, Kaoru Toko, Noritaka Usami, Andrew B. Filonov, Dmitri B. Migas, Denis A. Shohonov, Takashi Suemasu
    • Journal Title

      Journal of Applied Physics

      Volume: 127 Issue: 23 Pages: 233104-233104

    • DOI

      10.1063/5.0005763

    • NAID

      120007168368

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Hydrogen states in hydrogen-passivated semiconducting barium disilicide measured via muon spin rotation2020

    • Author(s)
      Zhihao Xu, Takuma Sato, Jumpei Nakamura, Akihiro Koda, Koichiro Shimomura, Andrew B. Filonov, Dmitry B. Migas, Takashi Suemasu
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: 7 Pages: 071004-071004

    • DOI

      10.35848/1347-4065/ab984b

    • NAID

      120007168334

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Significant enhancement of photoresponsivity in As-doped n-BaSi2 epitaxial films by atomic hydrogen passivation2020

    • Author(s)
      Sho Aonuki, Yudai Yamashita, Takuma Sato, Zhihao Xu, Kazuhiro Gotoh , Kaoru Toko , Yoshikazu Terai, Noritaka Usami, and Takashi Suemasu
    • Journal Title

      Applied Physics Express

      Volume: 13 Issue: 5 Pages: 051001-051001

    • DOI

      10.35848/1882-0786/ab8725

    • NAID

      120007127620

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of sputtering pressure and temperature of ITO electrodes on the performance of p-BaSi2/n-Si heterojunction solar cells2020

    • Author(s)
      Sugiyama Ryota、Yamashita Yudai、Toko Kaoru、Suemasu Takashi
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SF Pages: SFFA07-SFFA07

    • DOI

      10.35848/1347-4065/ab70a8

    • NAID

      120007127603

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of molecular beam epitaxy growth conditions on grain size and lattice strain in a-axis-oriented BaSi2 films2020

    • Author(s)
      Yamashita Yudai、Sato Takuma、Toko Kaoru、Suemasu Takashi
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SF Pages: SFFA09-SFFA09

    • DOI

      10.35848/1347-4065/ab6b7a

    • NAID

      120007127600

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of boron and hydrogen doping on the enhancement of photoresponsivity and photoluminescence of BaSi2 epitaxial films2020

    • Author(s)
      Benincasa Louise、Xu Zhihao、Deng Tianguo、Sato Takuma、Toko Kaoru、Suemasu Takashi
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SF Pages: SFFA08-SFFA08

    • DOI

      10.35848/1347-4065/ab6b83

    • NAID

      120007127601

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Point defects in BaSi2 thin films for photovoltaic applications studied by positron annihilation spectroscopy2020

    • Author(s)
      Montes A.、Eijt S. W. H.、Tian Y.、Gram R.、Schut H.、Suemasu T.、Usami N.、Zeman M.、Serra J.、Isabella O.
    • Journal Title

      Journal of Applied Physics

      Volume: 127 Issue: 8 Pages: 085304-085304

    • DOI

      10.1063/1.5126264

    • NAID

      120007132677

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Drastic enhancement of photoresponsivity in C-doped BaSi2 films formed by radio-frequency sputtering2020

    • Author(s)
      Nemoto T.、Matsuno S.、Sato T.、Gotoh K.、Mesuda M.、Kuramochi H.、Toko K.、Usami N.、Suemasu T.
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SF Pages: SFFA06-SFFA06

    • DOI

      10.35848/1347-4065/ab69dc

    • NAID

      120007127604

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Influence of Ba-to-Si deposition rate ratios on the electrical and optical properties of B-doped BaSi<sub>2</sub> epitaxial films2020

    • Author(s)
      Sugiyama Shu、Yamashita Yudai、TOKO Kaoru、SUEMASU Takashi
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SF Pages: SFFA04-SFFA04

    • DOI

      10.7567/1347-4065/ab65ae

    • NAID

      120007127606

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fabrication of As-doped n-type BaSi<sub>2</sub> epitaxial films grown by molecular beam epitaxy2020

    • Author(s)
      Aonuki Sho、Yamashita Yudai、TOKO Kaoru、SUEMASU Takashi
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SF Pages: SFFA01-SFFA01

    • DOI

      10.7567/1347-4065/ab5b7a

    • NAID

      120007127611

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Modeling the effects of defect parameters on the performance of a p-BaSi2/n-Si heterojunction solar cell2020

    • Author(s)
      Deng Tianguo、Xu Zhihao、Yamashita Yudai、Sato Takuma、Toko Kaoru、Suemasu Takashi
    • Journal Title

      Solar Energy Materials and Solar Cells

      Volume: 205 Pages: 110244-110244

    • DOI

      10.1016/j.solmat.2019.110244

    • NAID

      120007132681

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Three-step growth of highly photoresponsive BaSi2 light absorbing layers with uniform Ba to Si atomic ratios2019

    • Author(s)
      Yamashita Yudai、Sato Takuma、Saitoh Noriyuki、Yoshizawa Noriko、Toko Kaoru、Suemasu Takashi
    • Journal Title

      Journal of Applied Physics

      Volume: 126 Issue: 21 Pages: 215301-215301

    • DOI

      10.1063/1.5128690

    • NAID

      120007132684

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Correlation of native defects between epitaxial films and polycrystalline BaSi2 bulks based on photoluminescence spectra2019

    • Author(s)
      Sato Takuma、Yamashita Yudai、Xu Zhihao、Toko Kaoru、Gambarelli Serge、Imai Motoharu、Suemasu Takashi
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 11 Pages: 111001-111001

    • DOI

      10.7567/1882-0786/ab476f

    • NAID

      120007127613

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Effects of lattice parameter manipulations on electronic and optical properties of BaSi22019

    • Author(s)
      Shohonov D.A.、Migas D.B.、Filonov A.B.、Borisenko V.E.、Takabe R.、Suemasu T.
    • Journal Title

      Thin Solid Films

      Volume: 686 Pages: 137436-137436

    • DOI

      10.1016/j.tsf.2019.137436

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Investigation of defect levels in BaSi2 epitaxial films by photoluminescence and the effect of atomic hydrogen passivation2019

    • Author(s)
      Benincasa Louise、Hoshida Hirofumi、Deng Tianguo、Sato Takuma、Xu Zhihao、Toko Kaoru、Terai Yoshikazu、Suemasu Takashi
    • Journal Title

      Journal of Physics Communications

      Volume: 3 Issue: 7 Pages: 075005-075005

    • DOI

      10.1088/2399-6528/ab2fa1

    • NAID

      120007133014

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Marked enhancement of the photoresponsivity and minority-carrier lifetime of BaSi2 passivated with atomic hydrogen2019

    • Author(s)
      Xu Zhihao、Shohonov Denis A.、Filonov Andrew B.、Gotoh Kazuhiro、Deng Tianguo、Honda Syuta、Toko Kaoru、Usami Noritaka、Migas Dmitri B.、Borisenko Victor E.、Suemasu Takashi
    • Journal Title

      Physical Review Materials

      Volume: 3 Issue: 6

    • DOI

      10.1103/physrevmaterials.3.065403

    • NAID

      120007133339

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Investigation of native defects in BaSi2 epitaxial films by electron paramagnetic resonance2019

    • Author(s)
      Sato Takuma、Lombard Christian、Yamashita Yudai、Xu Zhihao、Benincasa Louise、Toko Kaoru、Gambarelli Serge、Suemasu Takashi
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 6 Pages: 061005-061005

    • DOI

      10.7567/1882-0786/ab2062

    • NAID

      120007127923

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Simple way of finding Ba to Si deposition rate ratios for high photoresponsivity in BaSi2 films by Raman spectroscopy2019

    • Author(s)
      Yamashita Yudai、Takahara Yuuki、Sato Takuma、Toko Kaoru、Uedono Akira、Suemasu Takashi
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 5 Pages: 055506-055506

    • DOI

      10.7567/1882-0786/ab14b9

    • NAID

      120007127924

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Impact of deposition pressure and two-step growth technique on the photoresponsivity enhancement of polycrystalline BaSi2 films formed by sputtering2019

    • Author(s)
      Matsuno Satoshi、Nemoto Taira、Mesuda Masami、Kuramochi Hideto、Toko Kaoru、Suemasu Takashi
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 2 Pages: 021004-021004

    • DOI

      10.7567/1882-0786/aafc70

    • NAID

      120007128046

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Operation of BaSi2 homojunction solar cells on p+-Si(111) substrates and the effect of structure parameters on their performance2019

    • Author(s)
      Kodama Komomo、Yamashita Yudai、Toko Kaoru、Suemasu Takashi
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 4 Pages: 041005-041005

    • DOI

      10.7567/1882-0786/ab0c4f

    • NAID

      120007128045

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Significant photoresponsivity enhancement of polycrystalline BaSi2 films formed on heated Si(111) substrates by sputtering2018

    • Author(s)
      Matsuno Satoshi、Takabe Ryota、Yokoyama Seiya、Toko Kaoru、Mesuda Masami、Kuramochi Hideto、Suemasu Takashi
    • Journal Title

      Applied Physics Express

      Volume: 11 Issue: 7 Pages: 071401-071401

    • DOI

      10.7567/apex.11.071401

    • NAID

      120007134088

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Identification of Vibrational Modes in BaSi<sub>2</sub> Epitaxial Films by Infrared and Raman Spectroscopy2018

    • Author(s)
      Hoshida Hirofumi、Murakoso Naoki、Suemasu Takashi、Terai Yoshikazu
    • Journal Title

      Defect and Diffusion Forum

      Volume: 386 Pages: 43-47

    • DOI

      10.4028/www.scientific.net/ddf.386.43

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Investigation of electrically active defects in undoped BaSi2 light absorber layers using deep-level transient spectroscopy2018

    • Author(s)
      Yamashita Yudai、Sato Takuma、Bayu Miftahullatif Emha、Toko Kaoru、Suemasu Takashi
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 57 Issue: 7 Pages: 075801-075801

    • DOI

      10.7567/jjap.57.075801

    • NAID

      210000149263

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] First Operation of n+-AZO/p-BaSi2 Thin Film Solar Cells2020

    • Author(s)
      Yudai Yamashita, Kaoru Toko, and Takashi Suemasu
    • Organizer
      The 30th International Photovoltaic Science and Engineering Conference (PVSEC-30)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Remarkable improvement of the optical properties of As-doped n-BaSi2 films2020

    • Author(s)
      Sho Aonuki, Kaoru Toko, and Takashi Suemasu
    • Organizer
      The 30th International Photovoltaic Science and Engineering Conference (PVSEC-30)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Formation of the high photoresponse BaSi2 films sputtered on glass substrates2020

    • Author(s)
      Ryota Koitabashi, Taira Nemoto, Masami Mesuda, Kaoru Toko, and Takashi Suemasu
    • Organizer
      The 30th International Photovoltaic Science and Engineering Conference (PVSEC-30)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 3D device simulation and first demonstration of BaSi2 thin film solar cells2020

    • Author(s)
      Yudai Yamashita, Rudi Santbergen, Carlos Mario Ruiz Tobon, Olindo Isabella, and Takashi Suemasu
    • Organizer
      PRiME 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Optical 3D device simulation of BaSi2 thin film solar cells2020

    • Author(s)
      Yudai Yamashita, Rudi Santbergen, Carlos Mario Ruiz Tobon, Miro Zeman, Olindo Isabella, and Takashi Suemasu
    • Organizer
      37th European PV Solar Energy Conference and Exhibition (37th EU-PVSEC)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Hydrogen states in BaSi2 by muon spin rotation2020

    • Author(s)
      Zhihao Xu, Takuma Sato, Jumpei Nakamura, Akihiro Koda, Koichiro Shimomura, and Takashi Suemasu
    • Organizer
      37th European PV Solar Energy Conference and Exhibition (37th EU-PVSEC)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Atomic hydrogen passivation for marked photoresponsivity improvement of As-doped n-BaSi2 films2020

    • Author(s)
      S. Aonuki, Y. Yamashita, T. Sato, Z. Xu, K. Toko, and T. Suemasu
    • Organizer
      62th Electric Materials Conference
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] First demonstration of n+-AZO/p-BaSi2 thin film solar cells2020

    • Author(s)
      Yudai Yamashita, Kaoru Toko, and Takashi Suemasu
    • Organizer
      Fifth Asian School-Conference on Physics and Technology of Nanostructured Materials (ASCO-NANOMAT 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Molecular beam epitaxy of BaSi2 light absorbers with smooth BaSi2/Si interface using three-step growth method2019

    • Author(s)
      Y. Yamashita, T. Sato, K. Toko and T. Suemasu
    • Organizer
      29th International Photovoltaic Science and Engineering Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fabrication of As-doped n-type BaSi2 Films Grown by Molecular Beam Epitaxy2019

    • Author(s)
      S. Aonuki, Y. Yamashita, K. Toko and T. Suemasu
    • Organizer
      5th Asia-Pacific Conference on Semiconducting Silicides and Related Materials
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Molecular Beam Epitaxy of High-quality Undoped BaSi2 Light Absorbers using Threestep Growth Method2019

    • Author(s)
      Y. Yamashita, T. Sato, K. Toko, T. Suemasu
    • Organizer
      5th Asia-Pacific Conference on Semiconducting Silicides and Related Materials
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of defect levels in undoped-BaSi2 epitaxial films and the effect of atomic hydrogen passivation by photoluminescence measurement2019

    • Author(s)
      L. Benincasa, H. Hoshida, T. Deng, T. Sato, Z. Xu, K. Toko, Y. Terai, and T. Suemasu
    • Organizer
      5th Asia-Pacific Conference on Semiconducting Silicides and Related Materials
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Electron paramagnetic resonance spectra of BaSi2 epitaxial films and bulk samples2019

    • Author(s)
      T. Sato, Y. Yamashita, Z. Xu, L. Benincasa, K. Toko, S. Gambarelli, T. Suemasu
    • Organizer
      5th Asia-Pacific Conference on Semiconducting Silicides and Related Materials
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Significant improvement of optical properties of BaSi2 due to atomic H passivation by radio-frequency plasma2019

    • Author(s)
      Z. Xu, K. Gotoh, T. Deng, K. Toko, N. Usami, and T. Suemasu
    • Organizer
      46th IEEE Photovoltaic Specialists Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Semiconducting BaSi2 solar cells and ultrafast current-induced domain wall motion in Mn4N2019

    • Author(s)
      T. Suemasu
    • Organizer
      4th Int. Conf. Energy Materials and Nanostructures
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Rare-earth free Si-based new materials for high-efficiency solar cells2019

    • Author(s)
      T. Suemasu
    • Organizer
      3rd Southeast Asia Collaborative Symposium on Energy Materials
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Characterization of Defect Levels in BaSi2 by DLTS and Significant Improvement of Photoresponsivity by Increasing Growth Temperature2019

    • Author(s)
      Y. Yamashita, T. Sato, K. Toko, T. Suemasu
    • Organizer
      MRS Spring Meeting and exhibit
    • Related Report
      2019 Annual Research Report
  • [Presentation] Significant impact of Ba to Si deposition rate ratios during molecular beam epitaxy on electrical and optical properties of BaSi2 absorber layers2018

    • Author(s)
      Takashi Suemasu
    • Organizer
      The Forum on the Science and Techonology of Silicon Materials
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Present status and future prospect of BaSi2 solar cells2018

    • Author(s)
      Takashi Suemasu
    • Organizer
      4th International Asian School Conference on Physics and Technology of Nanostructured Materials
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent achievements towards high-efficiency BaSi2 homojunction solar cells2018

    • Author(s)
      Takashi Suemasu
    • Organizer
      10th International WorkShop on Crystalline Siliciond for Solar Cells
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Remarks] 環境半導体・磁性体研究室

    • URL

      http://www.bk.tsukuba.ac.jp/~ecology/

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report
  • [Remarks] 環境半導体・磁性体研究室

    • URL

      http://www.bk.tsukuba.ac.jp/~ecology/publications.html

    • Related Report
      2018 Annual Research Report
  • [Patent(Industrial Property Rights)] 珪化バリウム膜およびその製造方法2018

    • Inventor(s)
      召田雅実、倉持豪人、末益崇
    • Industrial Property Rights Holder
      召田雅実、倉持豪人、末益崇
    • Industrial Property Rights Type
      特許
    • Filing Date
      2018
    • Acquisition Date
      2018
    • Related Report
      2018 Annual Research Report
  • [Patent(Industrial Property Rights)] 半導体装置およびその製造方法2018

    • Inventor(s)
      末益崇、都甲薫、宇佐美徳隆、原康祐
    • Industrial Property Rights Holder
      末益崇、都甲薫、宇佐美徳隆、原康祐
    • Industrial Property Rights Type
      特許
    • Filing Date
      2018
    • Acquisition Date
      2018
    • Related Report
      2018 Annual Research Report
  • [Patent(Industrial Property Rights)] 珪化バリウム系積層材及びその製造方法2018

    • Inventor(s)
      倉持豪人, 召田雅実, 末益崇
    • Industrial Property Rights Holder
      倉持豪人, 召田雅実, 末益崇
    • Industrial Property Rights Type
      特許
    • Filing Date
      2018
    • Acquisition Date
      2018
    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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