Highly Efficient and Stable Solar Cells Based on Thiazolothiazole and Naphthobisthiadiazole Copolymers

被引：53

作者：

Saito, Masahiko ^{[1
,2
]}

Osaka, Itaru ^{[2
,3
]}

Suzuki, Yasuhito ^{[2
]}

Takimiya, Kazuo ^{[1
,2
]}

Okabe, Takashi ^{[4
]}

Ikeda, Satoru ^{[4
]}

Asano, Tsuyoshi ^{[4
]}

机构：

[1] Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Hiroshima 7398527, Japan

[2] RIKEN Ctr Emergent Matter Sci, Emergent Mol Funct Res Grp, Wako, Saitama 3510198, Japan

[3] Japan Sci & Technol Agcy, Precursory Res Embryon Sci & Technol PRESTO, Chiyoda Ku, Tokyo 1020075, Japan

[4] JX Nippon Oil & Energy Corp, Cent Tech Res Lab, Naka Ku, Yokohama, Kanagawa 2310815, Japan

来源：

SCIENTIFIC REPORTS | 2015年 / 5卷

关键词：

POWER-CONVERSION EFFICIENCY; POLYMERS; STABILITY; ORIENTATION; TRANSISTOR; MORPHOLOGY; ADDITIVES; NETWORK; DESIGN;

D O I：

10.1038/srep14202

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A critical issue in polymer-based solar cells (PSCs) is to improve the power conversion efficiency (PCE) as well as the stability. Here, we describe the development of new semiconducting polymers consisting of thiophene, thiazolothiazole and naphthobisthiadiazole in the polymer backbone. The polymers had good solubility and thus solution-processability, appropriate electronic structure with narrow band gaps of similar to 1.57 eV and low-lying HOMO energy levels of similar to-5.40 eV, and highly ordered structure with the favorable face-on backbone orientation. Solar cells based on the polymers and PC71BM exhibited quite high PCEs of up to 9%. More interestingly, the cells also demonstrated excellent stability as they showed negligible degradation of PCE when stored at 85 degrees C for 500 hours in the dark under nitrogen atmosphere. These results indicate that the newly developed polymers are promising materials for PSCs in the practical use.

引用

页数：9

共 42 条

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