Nano-interface engineering of heterojunction quantum dot solar cells and the effect on charge separation of multiple excitons

2016 Fiscal Year Annual Research Report

• Project/Area Number: 26286013
• Research Institution: The University of Electro-Communications
• Principal Investigator: 沈 青 電気通信大学, 情報理工学(系)研究科, 教授 (50282926)
• Co-Investigator(Kenkyū-buntansha): 豊田 太郎 電気通信大学, その他部局等, 名誉教授 (40217576)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 量子ドット / 太陽電池 / 光励起キャリアダイナミクス / 界面修飾

Outline of Annual Research Achievements

（1）PbSe量子ドット太陽電池の界面修飾と界面電荷分離・再結合ダイナミクス
まず、新しい方法を提案し安定なPbSe量子ドット溶液の作製に成功した。次に、異なる4種類のリガンド分子をPbSe量子ドットの表面パッシベーションに適用し、PbSe量子ドット薄膜を形成した。これらのリガンドの違いによる①PbSe量子ドット膜の空気中での安定性の変化、② PbSe量子ドット膜のエネルギー準位の変化、③PbSe量子ドット太陽電池の光電変換特性の変化について詳しく調べた。さらに、過渡吸収法により量子ドット界面での電荷移動速度定数のリガンド依存性とそのメカニズムを検討した。PbSe量子ドットにおける光励起キャリアの寿命と再結合過程のリガンド分子依存性を明らかにした。適切な量子ドット界面修飾方法を確立できれば、空気中で安定でありさらなる高効率化であるPbSe量子ドット太陽電池の構築ができることが判明した。
（2）PbS量子ドット太陽電池の界面修飾と界面電荷再結合の抑制
PbS量子ドットヘテロ接合型太陽電池に、PbS量子ドット層とAu電極との界面にBTPA-4という新しい有機小分子層をホール選択層として導入することをはじめて提案した。これにより、PbS量子ドット太陽電池の開放電圧の向上に成功した。開放電圧の時間応答と交流インピーダンスの測定結果より、BTPA-4ホール選択層の導入により、この界面での再結合を著しく抑制できたため、PbS量子ドット太陽電池における光励起キャリアの寿命が長くなり、開放電圧が向上できたことが明らかになった。さらに、この有機小分子BTPA-4を導入したPbS量子ドット太陽電池は空気中で100日以上保存しても安定であることを実証した。この結果より、提案したBTPA-4ホール選択層は従来の有機ホール選択層より安定であり、量子ドット太陽電池に応用できることが判明した

Research Progress Status

28年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

28年度が最終年度であるため、記入しない。

Causes of Carryover

28年度が最終年度であるため、記入しない。

Expenditure Plan for Carryover Budget

28年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] East China University of Sci. & Tech.(China)
  • Country Name: China
  • Counterpart Institution: East China University of Sci. & Tech.
• [Int'l Joint Research] Universitat Jaume I(Spain)
  • Country Name: Spain
  • Counterpart Institution: Universitat Jaume I
• [Journal Article] Improvement of photovoltaic performance of colloidal quantum dot solar cells using organic small molecule as hole-selective layer (2017)
  • Author(s): Zhang Yaohong, Wu Guohua, Mora-Sero Ivan, Ding Chao, Liu Feng, Huang Qingxun, Ogomi Yuhei, Hayase Shuzi, Toyoda Taro, Wang Ruixiang, Otsuki Joe, and Shen Qing*
  • Journal Title: The Journal of Physical Chemistry Letter Volume: ８ Pages: 2163-2169
  • DOI: 10.1021/acs.jpclett.7b00683
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Alloying Strategy in CuInGaSe Quantum Dots for High Efficiency Quantum Dot Sensitized Solar Cells (2017)
  • Author(s): Wenxiang Peng, Jun Du, Zhenxiao Pan, Naoki Nakazawa, Jiankun Sun, Zhonglin Du, Gencai Shen, Juan Yu, Jin-Song Hu*, Qing Shen*, and Xinhua Zhong*
  • Journal Title: ACS Appl. Mater. Interfaces Volume: 9 Pages: 5328-5336
  • DOI: 10.1021/acsami.6b14649
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Photovoltaic Properties of CdSe Quantum Dot Sensitized Inverse Opal TiO2 Solar Cells: The Effect of TiCl4 Post Treatment (2017)
  • Author(s): Motoki Hironaka, Taro Toyoda, Kanae Hori, Yuhei Ogomi, Shuzi Hayase, Qing Shen*
  • Journal Title: Journal of Modern Physics Volume: 8 Pages: 522-530
  • DOI: https://doi.org/10.4236/jmp.2017.84034
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Ligand-dependent exciton dynamics and photovoltaic properties of PbS quantum dot heterojunction solar cells (2017)
  • Author(s): Jin Chang, Yuhei Ogomi, Chao Ding, Yao Hong Zhang, Taro Toyoda, Shuzi Hayase, Kenji Katayama and Qing Shen*
  • Journal Title: Phys. Chem. Chem. Phys. Volume: 19 Pages: 6358-6367
  • DOI: 10.1039/C6CP06561A
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Air Stable PbSe Colloidal Quantum Dot Heterojunction Solar Cells: Ligand-Dependent Exciton Dissociation, Recombination, Photovoltaic Property, and Stability (2016)
  • Author(s): Yaohong Zhang, Chao Ding, Guohua Wu, Naoki Nakazawa, Jin Chang, Yuhei Ogomi, Taro Toyoda, Shuzi Hayase, Kenji Katayama, and Qing Shen*
  • Journal Title: J. Phys. Chem. C Volume: 120 Pages: 28509-28518
  • DOI: 10.1021/acs.jpcc.6b10920
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Recent progress on quantum dot solar cells: a review, J. Photon. Energy (2016)
  • Author(s): Tomah Sogabe, Qing Shen, Koichi Yamaguchi
  • Journal Title: J. Photon. Energy Volume: 6 Pages: 040901
  • DOI: 10.1117/1.JPE.6.040901
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Adsorption and Electronic Structure of CdSe Quantum Dots on Single Crystal ZnO: A Basic Study of Quantum Dot-Sensitization System (2016)
  • Author(s): Taro Toyoda, Witoon Yindeesuk, Keita Kamiyama, Shuzi Hayase, and Qing Shen
  • Journal Title: The Journal of Physical Chemistry C Volume: 120 Pages: 16367-16376
  • DOI: 10.1021/acs.jpcc.6b04130
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Novel Y doped BiVO4 thin film electrodes for enhanced photoelectric and photocatalytic performance (2016)
  • Author(s): Yaohong Zhang, Zhiguo Yi*, Guohua Wu*, Qing Shen*
  • Journal Title: Journal of Photochemistry and Photobiology A: Chemistry Volume: 327 Pages: 25-32
  • DOI: https://doi.org/10.1016/j.jphotochem.2016.05.004
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Neutral and anionic tetrazole-based ligands in designing novel ruthenium dyes for dye-sensitized solar cells (2016)
  • Author(s): Guohua Wu, Ryuji Kanekoa, Yaohong Zhangb, Yoshinao Shinozakia, Kosuke Sugawaa,Ashraful Islamc,**, Liyuan Han, Idriss Bedjad, Ravindra Kumar Guptad, Qing Shen,Joe Otsukia
  • Journal Title: J. Power Sources Volume: 37 Pages: 416-425
  • DOI: https://doi.org/10.1016/j.jpowsour.2015.12.135
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] The effect of CdS on the charge separation and recombination dynamics in PbS/CdS double-layered quantum dot sensitized solar cells (2016)
  • Author(s): Koki Sato, Keita Ono, Takuya Izuishi, Shota Kuwahara, Kenji Katayama**, Taro Toyoda, Shuzi Hayase and Qing Shen*
  • Journal Title: chemical physics Volume: 478 Pages: 159-163
  • DOI: http://dx.doi.org/10.1016/j.chemphys.2016.03.014
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Surface engineering of PbS quantum dot sensitized solar cells with a conversion efficiency exceeding 7% (2016)
  • Author(s): Shuang Jiao, Jin Wang, Qing Shen, Yan Li and Xinhua Zhong
  • Journal Title: J. Mater. Chem. A, Volume: 4 Pages: 7214-7221
  • DOI: 10.1039/C6TA02465C
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Mn doped quantum dots sensitized solar cells with power conversion efficiency exceeding 9% (2016)
  • Author(s): Jin Wang, Yan Li, Qing Shen, Takuya Izuishi, Zhenxiao Pan, Ke Zhao and Xinhua Zhong
  • Journal Title: J. Mater. Chem. A Volume: 4 Pages: 877-886
  • DOI: 10.1039/C5TA09306F
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] The Electronic Structure and Photoinduced Electron Transfer Rate of CdSe Quantum Dots on Single Crystal Rutile TiO2: Dependence on the Crystal Orientation of the Substrate (2016)
  • Author(s): Taro Toyoda, Witoon Yindeesuk, Keita Kamiyama, Kenji Katayama, Hisayoshi Kobayashi, Shuzi Hayase, and Qing Shen
  • Journal Title: J. Phys. Chem. C Volume: 120 Pages: 2047-2057
  • DOI: 10.1021/acs.jpcc.5b09528
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Zn-Cu-In-Se Quantum Dot Solar Cells with a Certified Power Conversion Efficiency of 11.6% (2016)
  • Author(s): Jun Du, Zhonglin Du, Jin-Song Hu, Zhenxiao Pan, Qing Shen, Jiankun Sun, Donghui Long, Hui Dong, Litao Sun, Xinhua Zhong, and Li-Jun Wan
  • Journal Title: J. Am. Chem. Soc Volume: 138 Pages: 4201-4209
  • DOI: 10.1021/jacs.6b00615
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Effects of Interface Engineering on Photoexcited Carrier Dynamics and Photovoltaic Performance in Perovskite Solar Cell (2017)
  • Author(s): Qing Shen, Yuhei Ogomi, Taro Toyoda, Kenji Yoshino, Takashi Minemoto and Shuzi Hayase
  • Organizer: 2017 China PV Technology International Conference
  • Place of Presentation: Xian (China)
  • Year and Date: 2017-03-30 – 2017-04-01
  • Int'l Joint Research / Invited
• [Presentation] 量子ドット太陽電池の電荷分離界面の構築と高効率化への道筋 (2017)
  • Author(s): 沈 青、豊田太郎
  • Organizer: 日本化学会第97春季年会
  • Place of Presentation: 慶応大学（東京都）
  • Year and Date: 2017-03-17 – 2017-03-19
  • Invited
• [Presentation] Photoexcited Carrier Dynamics, Interface Passivation and Mechanism for Improving Photovoltaic Performance in perovskite solar cells (2017)
  • Author(s): Qing Shen, Yuhei Ogomi, Taro Toyoda, Kenji Yoshino, Takashi Minemoto and Shuzi Hayase
  • Organizer: Asia Pacific Hybrid and Organic Photovoltaics Conference
  • Place of Presentation: パシフィコ横浜 （神奈川県横浜市）
  • Year and Date: 2017-02-03 – 2017-02-04
  • Int'l Joint Research / Invited
• [Presentation] Perovskite and Quantum Dot Solar Cells: Photoexcited Carrier Dynamics, Interface Engineering and Mechanism for Improving Photovoltaic Performance (2016)
  • Author(s): Qing Shen, Taro Toyoda, and Shuzi Hayase
  • Organizer: 12th China SoG Silicon and PV Power Conference
  • Place of Presentation: JiaXing （China)
  • Year and Date: 2016-11-24 – 2016-11-26
  • Int'l Joint Research / Invited
• [Presentation] Photoexcited Carrier Dynamics in Perovskite Solar Cells: Uncovering the Mechanism for Achieving High Efficiency (2016)
  • Author(s): Qing Shen, Yuhei Ogomi, Taro Toyoda, Kenji Yoshino, Takashi Minemoto and Shuzi Hayase
  • Organizer: 10th Aseanian Conference on Nano-Hybrid Solar Cells
  • Place of Presentation: Beijing (China)
  • Year and Date: 2016-09-20 – 2016-09-24
  • Int'l Joint Research / Invited
• [Presentation] 量子ドット太陽電池のナノ界面制御と高効率化 (2016)
  • Author(s): 沈 青、豊田太郎
  • Organizer: 第77回応用物理学会秋季学術講演会
  • Place of Presentation: 朱鷺メッセ（新潟県新潟市）
  • Year and Date: 2016-09-13 – 2016-09-16
  • Invited
• [Presentation] 高速レーザー分光法による太陽電池での光励起キャリアダイナミクスの解明－量子ドット太陽電池とペロブスカイト太陽電池について－ (2016)
  • Author(s): 沈 青
  • Organizer: 第77回応用物理学会秋季学術講演会
  • Place of Presentation: 朱鷺メッセ（新潟県新潟市）
  • Year and Date: 2016-09-13 – 2016-09-16
  • Invited
• [Presentation] Slow Hot Carrier Cooling and Fast Hole Transfer to P3HT in Cesium Lead Iodide (CsPbI3) Perovskite (2016)
  • Author(s): Qing Shen, Teresa S. Ripolles, Yuhei Ogomi, Koji Nishinaka, Takuya Izuishi, Kenji Katayama, Taro Toyoda, Kenji Yoshino, Shuzi Hayase
  • Organizer: International Conference on Hybrid and Organic Photovolatics (HOPV16)
  • Place of Presentation: Swansea (UK)
  • Year and Date: 2016-06-28 – 2016-07-01
  • Int'l Joint Research
• [Presentation] Slow hot carrrier cooling and ultrafast hole transfer in CsPbI3 perovskite: potential for hot carrier solar cell application (2016)
  • Author(s): Qing Shen, Teresa S. Ripolles, Yuhei Ogomi, Koji Nishinaka, Takuya Izuishi, Kenji Katayama, Taro Toyoda, Kenji Yoshino, Shuzi Hayase
  • Organizer: the 26th international symposium on photochemistry
  • Place of Presentation: 大阪市中央公会堂（大阪府大阪市）
  • Year and Date: 2016-04-03 – 2016-04-04
  • Int'l Joint Research