Crystallization driven boost in fill factor and stability in additive-free organic solar cells.

ABSTRACT: The control of morphology and microstructure during and after the active layer processing of bulk-heterojunction solar cells is critical to obtain elevated fill factors and overall good device performance. With the recent development of non-fullerene acceptors, wide attention has been paid to improve miscibility, solubility and nanoscale separation by laborious molecular design processes and by the use of additives. Nonetheless, several post-processing strategies can equally contribute to obtain an optimum phase separation and even to an enhanced crystallinity, but their effect on performance and device lifetime of polymer/non-fullerene acceptor solar cells is still unclear. Herein, we report a systematic comparison between different post-processing treatments including thermal annealing (

SUBMITTER: Garcia Romero D 

PROVIDER: S-EPMC8562594 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature