通过降低电压损耗实现效率达20.6%的串联有机太阳能电池。

Tandem organic solar cells with 20.6% efficiency enabled by reduced voltage losses.

作者信息

Wang Jianqiu, Zheng Zhong, Bi Pengqing, Chen Zhihao, Wang Yafei, Liu Xiaoyu, Zhang Shaoqing, Hao Xiaotao, Zhang Maojie, Li Yongfang, Hou Jianhui

机构信息

State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Laboratory of Advanced Optoelectronic Materials, Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.

出版信息

Natl Sci Rev. 2023 Mar 30;10(6):nwad085. doi: 10.1093/nsr/nwad085. eCollection 2023 Jun.

Large voltage losses are the main obstacle for achieving high efficiency in organic solar cells (OSCs). Here we construct ternary OSCs by introducing an asymmetric small molecule acceptor AITC into PBDB-TCl : BTP-eC9 system and demonstrate the effectiveness in simultaneously decreasing energy disorder and non-radiative voltage losses. It is found that the introduction of AITC can modify domain size and increase the degree of crystallinity, which enhances open-circuit voltage and power conversion efficiency (19.1%, certified as 18.9%). Inspiringly, an output efficiency of 20.6% of the constructed tandem OSCs based on PBDB-TCl : AITC : BTP-eC9 ternary active layer output a recorded efficiency of 20.6% (certified as 20.3%), which is the highest value in OSCs field to date. This work demonstrates that decreasing the voltage losses by ternary strategy and constructing of tandem architecture are effective approaches towards improving photovoltaic performance.

大的电压损失是有机太阳能电池（OSC）实现高效率的主要障碍。在此，我们通过将不对称小分子受体AITC引入PBDB-TCl : BTP-eC9体系来构建三元有机太阳能电池，并证明了其在同时降低能量无序和非辐射电压损失方面的有效性。研究发现，引入AITC可以改变畴尺寸并提高结晶度，从而提高开路电压和功率转换效率（19.1%，认证效率为18.9%）。令人鼓舞的是，基于PBDB-TCl : AITC : BTP-eC9三元活性层构建的串联有机太阳能电池输出效率达到20.6%（认证效率为20.3%），这是迄今为止有机太阳能电池领域的最高值。这项工作表明，通过三元策略降低电压损失以及构建串联结构是提高光伏性能的有效方法。