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

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

SUBMITTER: Yang W 

PROVIDER: S-EPMC7057953 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature