Efficiency limits in wide-bandgap Ge-containing donor polymer:non-fullerene acceptor bulk heterojunction solar cells

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Written By Fluxim AG

J. I. Khan, S. Alsaggaf, R. S. Ashraf, B. Purushothaman, N. Chaturvedi, I. McCulloch, F. Laquai

Phys. Stat. Sol. (RRL) (2021)

https://doi.org/10.1002/pssr.202100206

The authors investigate charge carrier generation and recombination dynamics in blends of a novel wide-bandgap germanium-containing donor polymer, namely PEHGeNDT-BT, paired with either O-IDTBR or O-IDTBCN as a non-fullerene acceptor in BHJ solar cells by (ultrafast) transient spectroscopy and time-delayed collection field (TDCF) experiments. Carrier drift-diffusion simulations of the devices’ current-voltage (J-V) characteristics confirm that the experimentally determined kinetic parameters and process yields can reproduce the measured J-V curves under steady-state solar illumination.

Fluxim AG
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