Simultaneous enhanced efficiency and thermal stability in organic solar cells from a polymer acceptor additive

• DOI: 10.1038/s41467-020-14926-5
• Publication Date: 2020-03-05T11:06:26Z
• Authors: Wenyan Yang; Zhenghui Luo; Rui Sun; Jie Guo; Tao Wang; Yao Wu; Wei Wang; Jing Guo; Qiang Wu; Mumin Shi; Hongneng Li; Chuluo Yang; Jie Min
• Keywords: Acceptor; Degradation; Thermal Stability

Abstract The thermal stability of organic solar cells is critical for practical applications this emerging technology. Thus, effective approaches and strategies need to be found alleviate their inherent instability. Here, we show a polymer acceptor-doping general strategy report thermally stable bulk heterojunction photovoltaic system, which exhibits an improved power conversion efficiency 15.10%. Supported by statistical analyses device degradation data, morphological characteristics physical mechanisms study, polymer-doping blend shows longer lifetime, nearly keeping its ( t = 800 h) under accelerated aging tests at 150 o C. Further analysis the behaviors indicates bright future system in outer space applications. Notably, use acceptor as dual function additive other four systems was also confirmed, demonstrating good generality strategy.