Spatial balance of photogenerated charge carriers in active layers of polymer solar cells

0574217 - FZÚ 2024 RIV CH eng J - Journal Article
Im, C. - Kang, S.W. - Choi, J. Y. - An, J. - Mičová, J. - Remeš, Zdeněk
Spatial balance of photogenerated charge carriers in active layers of polymer solar cells.
Molecules. Roč. 28, č. 15 (2023), č. článku 5823. E-ISSN 1420-3049
Institutional support: RVO:68378271
Keywords : polymeric photovoltaics * non-fullerene acceptors * internal absorption * internal quantum efficiency * transfer matrix method * spatial balance * charge carrier distribution
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 4.6, year: 2022
Method of publishing: Open access

Bulk heterojunction polymer solar cells (PSC) blended with non-fullerene -type aceptors (NFA) possess good solar power conversion efficiency and compatibility with flexible electronics rendering them good candidates for mobile photovoltaic applications. However, their internal absorption performance and mechanism are yet to be fully elucidated because of their complicated interference effects caused by their multilayer device structure. The transfer matrix method (TMM) is ideal for analyzing complex optical electric fields by considering multilayer interference effects. In this study an active (AL) thickness-dependent TMM was used to obtain accurate information on the photon-captur ing mechanisms of NFA-based PSCs, for comparison with experimental results. Devices with AL thicknesses of 40–350 nm were prepared, and the AL-thickness-dependent device parameters with incident photon -to -current efficiency spectra were compared with calculated internal absorption spectra.
Permanent Link: https://hdl.handle.net/11104/0344562