In situ performance and stability tests of flexible polymer:non-fullerene solar cells at 35 km stratospheric environment
Zihan Xu a, Guoning Xu b, Yunfei Han a, Yu Tang b, Jian Qin a, Qun Luo a, Chang-Qi Ma a
a i-Lab & Printed Electronics Research Center, Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences (CAS), Suzhou 215123, P. R. China, 398 Ruoshui Road, SEID, SIP, Suzhou, China
b Aerospace Information Research Institute,Chinese Academy of Sciences, Beijing 100094, P. R. China
Proceedings of New Generation Photovoltaics for Space (PVSPACE)
Online, Spain, 2022 June 21st - 22nd
Organizers: Narges Yaghoobi Nia, Aldo Di Carlo, Luigi Schirone and Mahmoud Zendehdel
Invited Speaker, Qun Luo, presentation 007
Publication date: 8th June 2022

Flexible organic solar cell (FOSC) is one of the most promising power sources for aerospace aircrafts due to the attractive advantages of high power-per-weight ratio and excellent mechanical flexibility. Understanding the performance and stability of the high-performance FOSCs is essential for further development of FOSCs for aerospace application. In this work, we systematically investigated the performance of the state-of-the-art high-performance non-fullerene solar cells under low temperature (-60 ⁰C) and intensive UV illumination, and in situ measured the performance and stability of the FOSCs at 35 km stratospheric environment through a high-altitude balloon. The encapsulated FOSCs with an area of 0.64 cm2 gave a highest power density of 9.76 mW/cm2 under AM0 illumination, corresponding to a power-per-weight ratio around 2 kW/kg. More importantly, the cells showed stable power output during the 3-hour continuous flying at 35 km and only 10% performance decay after return back to the lab, suggesting a promising stability of the FOSCs in stratospheric environment.

This work was supported by the National Natural Science Foundation of China (22135001, 22075315), the Youth Innovation Promotion Association (2019317) and the Scientific Experimental System in Near Space of Chinese Academy of Sciences (XDA17020304) of Chinese Academy of Sciences.

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