有机太阳能电池
材料科学
结晶度
化学工程
活动层
热稳定性
退火(玻璃)
混溶性
纳米技术
聚合物
复合材料
薄膜晶体管
工程类
图层(电子)
作者
Sheng-Ci Huang,Manohar Reddy Busireddy,Hsin-Feng Chang,I-Cheng Pan,Chia-Hsing Ho,Chung‐Wen Ko,Yi-Wei Tsai,Jhih‐Min Lin,Jiun‐Tai Chen,Chain‐Shu Hsu
出处
期刊:Solar RRL
[Wiley]
日期:2022-10-31
卷期号:6 (12)
被引量:7
标识
DOI:10.1002/solr.202200805
摘要
Organic solar cells (OSCs) have drawn lots of attention because of their rapid development and great potential in large‐area flexible electronics. Recently, volatile solid additives have been widely used in optimizing morphologies of active layers and improving device performances for nonfullerene (NF)‐based OSCs. Most solid additives, however, still suffer severe problems such as unsuitable volatile temperatures and requirement of extra solvent additives. Herein, a new solid additive 2,7‐dibromo‐9,9‐dimethylfluorene (DBDMF) with a high crystallinity and suitable volatile temperature as an additive for NF‐based OSCs is designed. DBDMF can suppress the overaggregation of the nonfullerene acceptors (NFAs) and improve the material rearrangements after thermal annealing because of the good miscibility with the NFAs. As a result, DBDMF‐treated OSC devices display more favorable film morphologies and phase separation, well‐balanced charge mobilities, higher electron transfer rates, and better device stability. Consequently, the PM6:BTP‐BO‐4F binary system shows an outstanding power conversion efficiency of 17.2% from 15.3% with a simultaneous increase in the fill factor from 71.4 to 77.1%. Furthermore, DBDMF has been applied to other two active layers, manifesting the general applicability. This study demonstrates a feasible and promising approach to develop volatilizable solid additives for improving performance and stability of NF‐based OSCs.
科研通智能强力驱动
Strongly Powered by AbleSci AI