Dual-Donor-Induced Crystallinity Modulation Enables 19.23% Efficiency Organic Solar Cells.

ABSTRACT: Trap-assisted charge recombination is one of the primary limitations of restricting the performance of organic solar cells. However, effectively reducing the presence of traps in the photoactive layer remains challenging. Herein, wide bandgap polymer donor PTzBI-dF is demonstrated as an effective modulator for enhancing the crystallinity of the bulk heterojunction active layers composed of D18 derivatives blended with Y6, leading to dense and ordered molecular packings, and thus, improves photoluminescence quenching properties. As a result, the photovoltaic devices exhibit reduced trap-assisted charge recombination losses, achieving an optimized power conversion efficiency of over 19%. Besides the efficiency enhancement, the devices comprised of PTzBI-dF as a third component simultaneously

SUBMITTER: Liang A 

PROVIDER: S-EPMC11602937 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature