Development of solution-processed organic thin-film solar cells using unmodified fullerenes

• Project/Area Number: 26289094
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Electronic materials/Electric materials
• Research Institution: University of Hyogo
• Principal Investigator: Tada Kazuya 兵庫県立大学, 工学(系)研究科(研究院), 准教授 (90305681)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥15,730,000 (Direct Cost: ¥12,100,000、Indirect Cost: ¥3,630,000); Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2014: ¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000)
• Keywords: 有機薄膜太陽電池 / 導電性高分子 / 無修飾フラーレン / 非ハロゲン系溶媒

Outline of Final Research Achievements

To realize solution-processed organic thin-film solar cells with low economical and environmental costs, the author has studied solution-processed organic solar cells using unmodified fullerene and halogen-free solvent. It has been found that the PTB7-Th:C70 photocells prepared with 1,2,4-trimethylbenzene show power conversion efficiency (PCE) of 5% under1 sun illumination. In comparison with the device with C70-PCBM, the device with unmodified C70 shows low PCE but superior thermal robustness. It has been also found that power conversion efficiency (PCE) becomes higher at lower light illumination.

Research Products

• [Journal Article] Validation of opposed two-diode equivalent-circuit model for S-shaped characteristic in polymer photocell by low-light characterization (2017)
  • Author(s): K. Tada
  • Journal Title: Organic Electronics Volume: 40 Pages: 8-12
  • DOI: 10.1016/j.orgel.2016.10.031
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Characteristics of PTB7-Th:C70 bulk heterojunction photocells under low-light illumination: Critical effect of dark parallel resistance (2017)
  • Author(s): K. Tada
  • Journal Title: Physica Status Solidi (a) Volume: - Issue: 7
  • DOI: 10.1002/pssa.201700018
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Characteristics of PTB7:C70 Bulk Heterojunction Photocell Prepared with Halogen-Free Solvent at Low Light Illumination (2017)
  • Author(s): K. Tada
  • Journal Title: Molecular Crystals and Liquid Crystals Volume: -
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Characteristics of PTB7:C70 Bulk Heterojunction Photocell Prepared with Halogen-Free Solvent at Low Light Illumination (2016)
  • Author(s): K. Tada
  • Journal Title: Polymer Bulletin Volume: 73 Issue: 9 Pages: 2401-2408
  • DOI: 10.1007/s00289-016-1667-6
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Characterization of polymer bulk heterojunction photocell with unmodified C70 prepared with halogen-free solvent for indoor light harvesting (2016)
  • Author(s): K. Tada
  • Journal Title: Organic Electronics Volume: 30 Pages: 289-295
  • DOI: 10.1016/j.orgel.2015.12.031
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Parameter extraction from S-shaped current-voltage characteristics in organic photocell with opposed two-diode model: Effects of ideality factors and series resistance (2015)
  • Author(s): K. Tada
  • Journal Title: Physica Status Solidi (a) Volume: 212 Issue: 8 Pages: 1731-1734
  • DOI: 10.1002/pssa.201431877
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Prototyping of LED-based Spectral Response Measurement Device for Photocells (2015)
  • Author(s): 田中宏明、多田和也
  • Journal Title: IEEJ Transactions on Electronics, Information and Systems Volume: 135 Issue: 11 Pages: 1293-1298
  • DOI: 10.1541/ieejeiss.135.1293
  • NAID: 130005106326
  • ISSN: 0385-4221, 1348-8155
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Solution-processed photocells based on low energy-gap polymer and unmodified C70 composites from halogen-free solvent exceeding 5% power conversion efficiency (2015)
  • Author(s): K. Tada
  • Journal Title: Solar Energy Materials and Solar Cells Volume: 143 Pages: 52-57
  • DOI: 10.1016/j.solmat.2015.06.029
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Note: Measuring spectral response of photocells with light-emitting diodes (2015)
  • Author(s): K. Tada and H. Tanaka
  • Journal Title: Review of Scientific Instruments Volume: 86 Issue: 12
  • DOI: 10.1063/1.4938156
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Thermally robust bulk heterojunction photocells based on PTB7:C70 composites (2015)
  • Author(s): K. Tada
  • Journal Title: Solar Energy Materials and Solar Cells Volume: 132 Pages: 15-20
  • DOI: 10.1016/j.solmat.2014.07.052
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Thermal Annealing Effect on Optical Absorption Spectra of Poly(3-hexylthiophene):Unmodified-C<SUB>60</SUB> Composites (2015)
  • Author(s): K. Tada
  • Journal Title: IEICE Transactions on Electronics Volume: E98.C Issue: 2 Pages: 120-122
  • DOI: 10.1587/transele.E98.C.120
  • NAID: 130004841678
  • ISSN: 0916-8524, 1745-1353
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Solution-processed small molecular photocells with neat fullerene (2014)
  • Author(s): K. Tada
  • Journal Title: Solar Energy Materials and Solar Cells Volume: 130 Pages: 331-335
  • DOI: 10.1016/j.solmat.2014.07.032
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] S字型電流-電圧特性を有する有機薄膜太陽電池の低照射光特性と等価回路モデル (2017)
  • Author(s): 多田和也
  • Organizer: 2017年電子情報通信学会総合大会
  • Place of Presentation: 名城大学（愛知県名古屋市）
  • Year and Date: 2017-03-22
• [Presentation] 室内光ハーベスティングデバイスとしての低環境負荷型有機薄膜太陽電池 (2017)
  • Author(s): 多田和也
  • Organizer: 平成29年 電気学会全国大会
  • Place of Presentation: 富山大学（富山県富山市）
  • Year and Date: 2017-03-15
• [Presentation] S字特性を示す光電池用対向2ダイオードモデルの低照射光特性を用いた妥当性の検討 (2017)
  • Author(s): 多田和也
  • Organizer: 第64回 応用物理学会春季学術講演会
  • Place of Presentation: パシフィコ横浜（神奈川県横浜市）
  • Year and Date: 2017-03-14
• [Presentation] Polymeric Photocells Using Unmodified Fullerene Prepared with Halogen-free Solvent (2016)
  • Author(s): K. Tada
  • Organizer: IUPAC International Conference on Advanced Polymeric Materials Commemorating the 40th Anniversary of the Polymer Society of Korea (IUPAC-PSK40)
  • Place of Presentation: 済州島（韓国）
  • Year and Date: 2016-10-04
  • Int'l Joint Research / Invited
• [Presentation] I-V曲線にS字特性を有する高分子光電池の低照射光特性 (2016)
  • Author(s): 多田和也
  • Organizer: 電子情報通信学会 有機エレクトロニクス研究会
  • Place of Presentation: 大阪大学（大阪府吹田市）
  • Year and Date: 2016-09-30
• [Presentation] 無修飾フラーレンと非ハロゲン系溶媒を用いた高分子光起電力素子の低照射光特性 (2016)
  • Author(s): 多田和也
  • Organizer: 2016年電子情報通信学会ソサイエティ大会
  • Place of Presentation: 北海道大学（北海道札幌市）
  • Year and Date: 2016-09-20
• [Presentation] 1 sun照射下でS字特性を示すバルクヘテロジャンクション型光電池の低照射光特性 (2016)
  • Author(s): 多田和也
  • 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
• [Presentation] Characteristics of PTB7:C70 Bulk Heterojunction Photocell Prepared with Halogen-Free Solvent at Low Light Illumination (2016)
  • Author(s): K. Tada
  • Organizer: KJF International Conference on Organic Materials for Electronics and Photonics (KJF-ICOMEP 2016)
  • Place of Presentation: アクロス福岡（福岡県福岡市）
  • Year and Date: 2016-09-04
  • Int'l Joint Research
• [Presentation] Characteristics of PTB7-Th:C70 bulk heterojunction photocells under low-light illumination (2016)
  • Author(s): K. Tada
  • Organizer: The 18th International Conference on Crystal Growth and Epitaxy (ICCGE18)
  • Place of Presentation: 名古屋国際会議場（愛知県名古屋市）
  • Year and Date: 2016-08-07
  • Int'l Joint Research
• [Presentation] 無修飾フラーレンを用いた高分子光電池の低照射光特性 (2016)
  • Author(s): 多田和也
  • Organizer: 電子情報通信学会 有機エレクトロニクス研究会
  • Place of Presentation: しいのき迎賓館（石川県金沢市）
  • Year and Date: 2016-07-15
• [Presentation] PTB7:C70バルクヘテロジャンクション型光電池の低照射光特性 (2016)
  • Author(s): 多田 和也
  • Organizer: 第63回 応用物理学関係連合講演会
  • Place of Presentation: 東京工業大学 大岡山キャンパス（東京都目黒区）
  • Year and Date: 2016-03-19
• [Presentation] LEDを用いた光電池の分光感度特性の評価 (2016)
  • Author(s): 54.田中宏明，多田和也
  • Organizer: 平成28年 電気学会全国大会
  • Place of Presentation: 東北大学 川内キャンパス（宮城県仙台市）
  • Year and Date: 2016-03-16
• [Presentation] 無修飾フラーレンと非ハロゲン系溶媒を用いた塗布型有機太陽電池 (2015)
  • Author(s): 多田 和也
  • Organizer: 電子情報通信学会 有機エレクトロニクス研究会
  • Place of Presentation: 大阪大学中之島センター（大阪府大阪市）
  • Year and Date: 2015-10-23
  • Invited
• [Presentation] PTB7:C70複合体を用いた耐熱性のある塗布型有機太陽電池 (2015)
  • Author(s): 多田 和也
  • Organizer: 第76回応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場（愛知県名古屋市）
  • Year and Date: 2015-09-13
• [Presentation] Characteristics of PTB7:C70 Bulk Heterojunction Photocell Prepared with Halogen-Free Solvent at Low Light Illumination (2015)
  • Author(s): K. Tada
  • Organizer: KJF International Conference on Organic Materials for Electronics and Photonics (KJF-ICOMEP)
  • Place of Presentation: 済州島（韓国）
  • Year and Date: 2015-09-06
  • Int'l Joint Research / Invited
• [Presentation] 対向する２個のダイオードを有する等価回路による光起電力素子のS字特性のフィッティング (2015)
  • Author(s): 多田 和也
  • Organizer: 電気学会 誘電・絶縁材料研究会
  • Place of Presentation: 富山大学（富山県富山市）
  • Year and Date: 2015-07-29
• [Presentation] Revival of unmodified fullerene in polymer bulk heterojunction photocells (2015)
  • Author(s): K. Tada
  • Organizer: International Conference on Electrical and Electronic Material Engineering (ICEME2015)
  • Place of Presentation: 新大阪ブリックビル（大阪府大阪市）
  • Year and Date: 2015-05-16
  • Int'l Joint Research
• [Presentation] PTB7:C70複合体を用いた耐熱性のある塗布型有機太陽電池 (2015)
  • Author(s): 多田和也
  • Organizer: 第62回 応用物理学関係連合講演会
  • Place of Presentation: 東海大学湘南キャンパス（神奈川県平塚市）
  • Year and Date: 2015-03-11 – 2015-03-14
• [Presentation] PTB7:C70複合体を用いた塗布型高分子太陽電池への熱アニーリング効果 (2015)
  • Author(s): 多田和也
  • Organizer: 2015年電子情報通信学会総合大会
  • Place of Presentation: 立命館大学びわこくさつキャンパス（滋賀県草津市）
  • Year and Date: 2015-03-10 – 2015-03-13
• [Presentation] 有機光起電力素子の電流―電圧特性の等価回路モデルへのフィッティングによる評価 (2015)
  • Author(s): 多田和也
  • Organizer: 電子情報通信学会 有機エレクトロニクス研究会
  • Place of Presentation: 自然科学研究機構 岡崎コンファレンスセンター（愛知県岡崎市）
  • Year and Date: 2015-01-21
• [Presentation] Realization of solution-processed bulk heterojunction photocells using neat fullerenes combined with halogen-free solvent (2014)
  • Author(s): K. Tada
  • Organizer: The 14th International symposium on Advanced Organic Photonics (ISAOP-14)
  • Place of Presentation: 大阪大学吹田キャンパス（大阪府吹田市）
  • Year and Date: 2014-11-04 – 2014-11-05
  • Invited
• [Presentation] 無修飾フラーレンと非ハロゲン化溶媒を用いた低分子系有機薄膜光起電力素子 (2014)
  • Author(s): 多田和也
  • Organizer: 2014年電子情報通信学会ソサイエティ大会
  • Place of Presentation: 徳島大学 常三島キャンパス（徳島県徳島市）
  • Year and Date: 2014-09-23 – 2014-09-26
• [Presentation] Solution-Processed Small Molecular Bulk Heterojunction Photocells with p-DTS(FBTTh2)2:C70 Composites (2014)
  • Author(s): K. Tada
  • Organizer: KJF International Conference on Organic Materials for Electronics and Photonics (KJF-ICOMEP)
  • Place of Presentation: つくば国際会議場（茨城県つくば市）
  • Year and Date: 2014-09-20 – 2014-09-23
• [Presentation] 高分子電子輸送層の適用によるPTB7:C70バルクヘテロジャンクション光起電力素子のパワー変換効率向上 (2014)
  • Author(s): 多田和也
  • Organizer: 第75回応用物理学会秋季学術講演会
  • Place of Presentation: 北海道大学 札幌キャンパス（北海道札幌市北区）
  • Year and Date: 2014-09-17 – 2014-09-20
• [Presentation] Thermal annealing effect on optical absorption spectra of poly(3-hexylthiophene):unmodified-C60 composites (2014)
  • Author(s): K. Tada
  • Organizer: 8th International Symposium on Organic Molecular Electronics (ISOME 2014)
  • Place of Presentation: 東京農工大学小金井キャンパス（東京都小金井市）
  • Year and Date: 2014-05-15 – 2014-05-16
• [Remarks]
  • URL: http://www.eng.u-hyogo.ac.jp/eecs/tada/tada.htm
• [Remarks] http://www.eng.u-hyogo.ac.jp/eecs/tada/tada.htm