基于聚合物给体/有机小分子/富勒烯受体的三元共混有机太阳能电池

doi:10.6023/A14080607

化学学报 ›› 2015, Vol. 73 ›› Issue (3): 252-256.DOI: 10.6023/A14080607 上一篇下一篇

所属专题：新型太阳能电池

研究通讯

基于聚合物给体/有机小分子/富勒烯受体的三元共混有机太阳能电池

程沛^a,c, 史钦钦^a, 占肖卫^b

a 中国科学院化学研究所中国科学院有机固体重点实验室北京 100190;
b 北京大学工学院材料科学与工程系北京 100871;
c 中国科学院大学北京 100049

投稿日期:2014-08-26 发布日期:2014-09-06
通讯作者: 占肖卫 E-mail:xwzhan@pku.edu.cn
基金资助:
项目受国家自然科学基金(Nos. 21025418, 51261130582)、国家973计划(No. 2011CB808401)和中国科学院的资助.

Ternary Blend Organic Solar Cells Based on P3HT/TT-TTPA/PC₆₁BM

Cheng Pei^a,c, Shi Qinqin^a, Zhan Xiaowei^b

a Beijing National Laboratory for Molecular Sciences and CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190;
b Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871;
c University of Chinese Academy of Sciences, Beijing 100049

Received:2014-08-26 Published:2014-09-06
Supported by:
Project supported by the National Natural Science Foundation of China (Nos. 21025418, 51261130582), the 973 Project (No. 2011CB808401) and the Chinese Academy of Sciences.

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摘要/Abstract

成功构筑了基于聚合物给体P3HT/有机小分子TT-TTPA/富勒烯受体PC₆₁BM的三元共混有机太阳能电池. 共轭有机小分子TT-TTPA与PC₆₁BM有很好的相容性, 相分离很小. 溶剂退火和热退火时, 含量相对较少的TT-TTPA容易从P3HT相中脱离出来进入PC₆₁BM相, 增加P3HT的结晶空间, 从而提高P3HT的结晶度和相纯度. 通过引入少量的第三组分TT-TTPA, 制备的三元共混有机太阳能电池获得了4.41%的能量转换效率, 相对于P3HT/PC₆₁BM二元共混体系的效率(3.85%)提高显著.

关键词: 有机太阳能电池, 三元共混, P3HT/PC₆₁BM, 相纯度, 形貌调控

Organic solar cells (OSCs) are a promising cost-effective alternative for utility of solar energy, and possess advantages such as low cost, light weight and flexibility. Much attention has been focused on the development of OSCs (synthesis of new donor or acceptor materials, control of morphology of active layer and fabrication of new device structures) which have seen a dramatic rise in efficiency over the last decade. Since the bulk heterojunction concept was reported in 1995, two-component (binary) blend has been predominant as active layer and achieved great success with power conversion efficiencies (PCEs) up to ca. 10%. Ternary blend of active layer consisting of a donor material, an acceptor material and a third component has received increasing attention in recent five years. The third components include light-absorbing polymers or small molecules, fullerene or non-fullerene acceptors, inorganic nanomaterials (quantum dots, metal nanomaterials or carbon-based nanomaterials) and organic nonvolatile additives (polymers or small molecules). Compared with binary blend, ternary blend may present some advantages: broader and stronger absorption; more efficient charge transfer and charge transport, better morphology and improved stability. In this work, we fabricated ternary blend OSCs based on P3HT/TT-TTPA/PC₆₁BM blend. TT-TTPA is a conjugated small molecule with thiazolothiazole as acceptor unit, triphenylamine as donor unit and thiophene as bridge. TT-TTPA has good miscibility with PC₆₁BM and the phase separation scale of TT-TTPA/PC₆₁BM blend is very small. During solvent annealing and thermal annealing, the small amount of TT-TTPA in P3HT domains can move from P3HT domains to PC₆₁BM domains, thus increase the phase purity of P3HT domains that can undergo crystallization. After optimization of the weight ratio of TT-TTPA in ternary blend, we achieved better PCE (4.41%) relative to binary blend (3.85%). Effects of TT-TTPA on absorption, crystallinity and morphology of P3HT:PC₆₁BM blend films were investigated by UV-vis, X-ray diffraction and atomic force microscopy.

Key words: organic solar cells, ternary blend, P3HT/PC₆₁BM, domain purity, morphology control

引用此文

程沛, 史钦钦, 占肖卫. 基于聚合物给体/有机小分子/富勒烯受体的三元共混有机太阳能电池[J]. 化学学报, 2015, 73(3): 252-256.

Cheng Pei, Shi Qinqin, Zhan Xiaowei. Ternary Blend Organic Solar Cells Based on P3HT/TT-TTPA/PC₆₁BM[J]. Acta Chim. Sinica, 2015, 73(3): 252-256.

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基于聚合物给体/有机小分子/富勒烯受体的三元共混有机太阳能电池

Ternary Blend Organic Solar Cells Based on P3HT/TT-TTPA/PC₆₁BM

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基于聚合物给体/有机小分子/富勒烯受体的三元共混有机太阳能电池

Ternary Blend Organic Solar Cells Based on P3HT/TT-TTPA/PC61BM

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Ternary Blend Organic Solar Cells Based on P3HT/TT-TTPA/PC₆₁BM