物理化学学报 >> 2021, Vol. 37 >> Issue (3): 2009056.doi: 10.3866/PKU.WHXB202009056

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基于非富勒烯电子受体的半透明有机太阳能电池

刘柏侨1, 许韵华1,*(), 夏冬冬3, 肖承义2,*(), 杨兆凡2, 李韦伟2,*()   

  1. 1 北京交通大学理学院化学系，北京 100044
    2 北京化工大学有机无机复合材料国家重点实验室，北京 100029
    3 中国科学院化学研究所有机固体实验室北京分子科学国家实验室，北京 100190
  • 收稿日期:2020-09-17 录用日期:2020-10-30 发布日期:2020-11-12
  • 通讯作者: 许韵华,肖承义,李韦伟 E-mail:yhxu@bjtu.edu.cn;xiaocy@mail.buct.edu.cn;liweiwei@iccas.ac.cn
  • 作者简介:许韵华，北京交通大学教授，博士生导师。主要研究方向为光电材料及应用、精细化工品、应用电化学、材料工程、光学
    肖承义，2017年获得中国科学院化学研究所博士学位，现为北京化工大学讲师。主要研究方向为有机场效应晶体管，有机太阳能电池及有机柔性器件
    李韦伟，北京化工大学教授，博士生导师，研究方向为新型有机共轭材料的开发，有机太阳能电池、有机场效应晶体管、柔性器件
  • 基金资助:
    国家自然科学基金(52073016);国家自然科学基金(21905018);中央高校基础研究经费(XK1802-2)

Semitransparent Organic Solar Cells based on Non-Fullerene Electron Acceptors

Baiqiao Liu1, Yunhua Xu1,*(), Dongdong Xia3, Chengyi Xiao2,*(), Zhaofan Yang2, Weiwei Li2,*()   

  1. 1 Department of Chemistry, School of Science, Beijing Jiaotong University, Beijing 100044, China
    2 State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
    3 Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2020-09-17 Accepted:2020-10-30 Published:2020-11-12
  • Contact: Yunhua Xu,Chengyi Xiao,Weiwei Li E-mail:yhxu@bjtu.edu.cn;xiaocy@mail.buct.edu.cn;liweiwei@iccas.ac.cn
  • About author:Weiwei Li. Email: liweiwei@iccas.ac.cn (W.L.)
    Chengyi Xiao. Email: xiaocy@mail.buct.edu.cn (C.X.)
    Yunhua Xu. Email: yhxu@bjtu.edu.cn (Y.X.)


  • Supported by:
    the National Natural Science Foundation of China(52073016);the National Natural Science Foundation of China(21905018);the Fundamental Research Funds for the Central Universities(XK1802-2)

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摘要：

半透明有机太阳能电池以其独特的光电特性在建筑集成光伏上具有广阔的应用前景。非富勒烯小分子受体近几年发展十分迅速。其中，基于非富勒烯小分子受体的半透明有机太阳能电池具有较高的光电转换效率和平均可见光透过率，因而得到了广泛关注。本文总结了近几年来非富勒烯受体型半透明有机太阳能电池的最新研究进展，探究活性层材料设计及器件构型优化对半透明有机太阳能电池的影响，希望为半透明有机太阳能电池在今后研究中新材料体系的优选提供一定的参考。

关键词: 半透明有机太阳能电池, 非富勒烯受体, 平均可见光透射率, 光电转换效率

Abstract:

Semitransparent organic solar cells (ST-OSCs) have attracted attention for use in building integrated photovoltaics because of their large range tunability in colors, transparency, and high efficiency. However, the development of semitransparent devices based on fullerene acceptors remained almost stagnant in the early period. This was due to the weak absorption of fullerene small molecules in the visible and near-infrared regions as well as the large non-radiative energy loss, resulting in drastic open-circuit voltage loss. In addition, the energy level and chemical structure of fullerene molecules cannot be easily regulated, and the strong aggregation characteristics of fullerenes greatly limit the development of OSCs. In contrast, the designability of the chemical structures and controllability of the energy levels of non-fullerene electron acceptors has encouraged researchers to explore high-performance organic solar cells while and simultaneously stimulating the development of ST-OSCs. In this review, the recent progress in non-fullerene small molecule acceptors for ST-OSCs is summarized. The article focuses on ST-OSCs from the aspects of device structures and active layers. In view of the semitransparent device structure, except for replacing the traditional electrodes with semitransparent electrodes, researchers have introduced suitable interface layers to regulate the absorption and reflection of sunlight. The interface layers mainly contain a reflective layer (evaporated on the top electrode to reflect near-infrared light); an anti-reflection layer (located below ITO (indium tin oxide)) to mitigate light reflection at the air-glass interface and thus enhance the absorption of sunlight); and an optical outcoupling layer (simultaneously increasing reflection and transmission). From the active layer, it is mainly divided into two categories. First, researchers have optimized the photovoltaic performance of semitransparent devices from the perspective of molecular structures, mainly by broadening the absorption window of non-fullerene small molecule acceptors, thus improving the crystallinity and charge mobility of small molecules, and regulating the stacking behavior and orientation of molecules in the films. Second, regarding the active layer processing, much effort has been undertaken to optimize the light absorption, morphology, and charge carrier transport channels of blended films.

Key words: Semitransparent organic solar cell, Non-fullerene acceptor, Average visible-light transmittance, Power conversion efficiency