摘要
活性层形貌的调控是实现全小分子有机太阳能电池高效率和稳定性的关键.本文将聚合物给体PM7作为形貌调节剂加入到BTTzR∶Y6二元体系中,制备了三元全小分子有机太阳能电池.研究结果表明,少量PM7的加入能够有效改善共混膜中的微观纳米结构和分子堆积,促使器件获得更加有效的激子解离和载流子传输;相应器件的短路电流和填充因子显著提升,最终能量转化效率从二元器件的13.9%提高到三元器件的16.0%.值得注意的是,三元器件的热稳定性大幅提升,在85℃加热2200 min后依然能够保持初始效率的79%;而二元器件则大幅衰减到初始效率的43%.以上结果表明,添加聚合物添加剂可以有效地调节共混膜形貌,以获得高效和稳定的全小分子有机太阳能电池.
For all-small-molecule organic solar cells(ASM-OSCs),modulating the morphology of active layer has been a challenging and urgent issue to achieve high efficiency and stablity.In this work,a polymer donor PM7 as a morphology modulator was incorporated to a BTTzR∶Y6 system to fabricate ternary ASM-OSCs.A small amount of PM7 could promote more favourable nanostructure and ordered molecular packing in the blend film,resulting in more efficient excition dissiociation and charge carrier transport in the device.As a result,the optimal ternary devices exhibited a significantly improved power conversion efficiency(PCE)of 16.0%with simultaneously enhanced short circuit current(JSC)and fill factor(FF)compared to the binary devices with a PCE of 13.9%.Notably,after being heated at 85℃for 2200 min,the ternary devices still retained 79%of its initial PCE,whereas the binary devices showed larger decay to 43%in the same duration.The results demonstrated that adding the polymer additive can effectively modulate the blend morphology for highly efficient and stable ASM-OSCs.
作者
时宇
张榴
国霞
王阳
肖海芹
房进
周祎
张茂杰
SHI Yu;ZHANG Liu;GUO Xia;WANG Yang;XIAO Haiqin;FANG Jin;ZHOU Yi;ZHANG Maojie(Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices,College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou 215123,China;National Engineering Research Center for Colloidal Materials,School of Chemistry&Chemical Engineering,Shandong University,Jinan 250100,China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2023年第7期149-158,共10页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:51973146)
山东省自然科学基金会(批准号:ZR2022JQ09)资助.
关键词
全小分子有机太阳能电池
聚合物添加剂
形貌调控
高效率与稳定性
All-small-molecule organic solar cell
Polymer additive
Morphology modulator
High efficiency and stability
作者简介
国霞,女,博士,教授,主要从事有机光伏材料与器件方面的研究.E⁃mail:guoxia0610@sdu.edu.cn;张茂杰,男,博士,教授,主要从事有机光伏领域方面的研究.E-mail:mjzhang@sdu.edu.cn。
