摘要
活性层获得高质量薄膜是制备高性能三元有机太阳能电池(TOSCs)的前提,引入高结晶第三组分是一种简单而有效的薄膜优化手段之一。采用高结晶非富勒烯受体ITIC-Th作为第三组分,与非富勒烯受体BTP-BO-4F、聚合物给体PM6制备了一系列TOSCs。ITIC-Th作为形貌调节剂,可优化薄膜的分子排列和相分离;ITIC-Th作为光谱吸收互补的第三组分,可拓宽活性层的光谱吸收范围。此外,ITIC-Th与BTP-BO-4F易形成合金状态,可抑制器件的非辐射复合。当引入的ITIC-Th含量为5%时,TOSCs性能达到最优,能量转换效率(PCE)为17.66%,短路电流密度(J_(SC))为26.51mA·cm^(-2),开路电压(V_(OC))为0.862V,填充因子(FF)为77.32%,这主要得益于ITIC-Th作为第三组分协同优化了器件的光子俘获、激子解离、载流子传输和电荷收集,从而获得高性能TOSCs。选择高结晶非富勒烯受体作为第三组分是一种制备高性能TOSCs的有效策略,有利于推进TOSCs的商业化。
Obtaining high-quality thin films from the active layer is a prerequisite for the preparation of high-performance ternary organic solar cells(TOSCs),introducing the third component with high crystallinity is one of the simple and effective methods to optimize thin films..A series of TOSCs were prepared using the highly crystalline non-fullerene acceptor ITIC-Th as the third component,together with the non-fullerene acceptor BTP-BO-4F and the polymer donor PM6.As a morphology modifier,ITIC-Th can optimize the molecular arrangement and phase separation of thin films;as a third component with complementary spectral absorption,ITIC-Th can broaden the spectral absorption range of the active layer.In addition,ITIC-Th and BTP-BO-4F easily form an alloy state,which can inhibit the non-radiative recombination of the device.When the content of ITIC-Th is 5%,the TOSCs have the best performance,the power conversion efficiency(PCE)is 17.66%,the short-circuit current density(J_(SC))is 26.51 mA·cm^(-2),and the open-circuit voltage(V_(OC))is 0.862 V,with a fill factor(FF)of 77.32%,which are mainly due to ITIC-Th as the third component that synergistically optimizes the photon trapping,exciton dissociation,carrier transport,and charge collection of the device,resulting in high-performance TOSCs.Selecting a highly crystalline non-fullerene acceptor as the third component is an effective strategy to pre-pare high-performance TOSCs,which is beneficial to advance the commercialization of TOSCs.
作者
邓正起
黄天环
张坚
DENG Zhengqi;HUANG Tianhuan;ZHANG Jian(School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China;Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology,Guilin 541004,China)
出处
《桂林电子科技大学学报》
2024年第5期535-543,共9页
Journal of Guilin University of Electronic Technology
基金
国家自然科学基金(61774050)
广西自然科学基金(2019GXNSFGA245005)
广西科学研究与技术发展计划(2020ZYZX2005)
桂林电子科技大学研究生教育创新计划(2021YCXS157)。
关键词
三元有机太阳能电池
形貌调节剂
活性层
分子排列
相分离
ternary organic solar cell
morphology modifier
active layer
molecular arrangement
phase separation
作者简介
通信作者:张坚(1977-),男,教授,博士,研究方向为有机光电材料与器件。E-mail:jianzhang@guet.edu.cn。
