Proceedings of MATSUS Fall 2023 Conference (MATSUSFall23)
Publication date: 18th July 2023
The rapid development of commercial and scientific space programs requires next-generation radiation-resistant optoelectronics and photovoltaics. Organic photodiodes and photovoltaics hold great promise for the fabrication of cost-effective and ultralight optoelectronic and energy-harvesting devices. They are prominent candidates for space applications as the most lightweight among all inorganic and perovskite counterparts.
In this study, we conducted a comprehensive quantitative analysis of the photodiode and photovoltaic characteristics of organic non-fullerene PCE10:ITIC-4F devices before and after exposure to a 150 ns pulse of 170 keV proton irradiation with the fluence of 2·1012 p/cm2 that is equivalent to six years of operation at a low Earth orbit. While an expected initial performance reduction happened under the photodiode and photovoltaic operation modes, a hitherto unknown self-healing effect in the organic devices was observed during several days after the extreme proton irradiation. We investigated the BHJ material properties and the multi-mechanisms recombination processes before and after irradiation and during the self-healing phase. This analysis provides a quantitative understanding of the changes occurring in the device physics and points toward the relevant aspects of the self-healing mechanism related to the dynamics of proton-induced traps in the bulk of the organic active layer.
This work was accepted by Advanced Energy Materials (DOI: 10.1002/aenm.202301696).
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