Stabilized Efficiency of Nonfullerene Organic Solar Cells Under UV-Filtered Sunlight
Journal
Solar RRL
Journal Volume
6
Journal Issue
12
Start Page
2200712
Date Issued
2022-12
Author(s)
Kuan-Yun Chiu
Pei-Hsuan Lo
Yi-Ru Lin
Ngoc Khanh Tran Ho
Yan-Jia Liao
Hsin-Fei Meng
Yu-Chiang Chao
農業部農業試驗所
Sheng-Fu Horng
Hsiao-Wen Zan
Abstract
The ultraviolet (UV) part in the sunlight is known to cause most damage to organic photovoltaics (OPV). UV filters therefore can improve stability. The lifetime of the UV-filtered OPV is determined by visible light. Herein, visible sunlight is divided into several bands and modeled by light-emitting diodes to study the stability of ternary OPV. Poly[(2,6-(4,8-bis(5-(2-ethylhexyl-3-fluoro)thiophen-2-yl)-benzo[1,2-b:4,5-b']dithiophene))-alt-(5,5-(1',3'-di-2-thienyl-5;,7'-bis(2-ethylhexyl)benzo[1',2'-c:4',5'-c']dithiophene-4,8-dione)] (PM6) is used as the donor. 2,2'-((2Z,2'Z)-((12,13-bis(2-ethylhexyl)-3,9-diundecyl-12,13-dihydro-[1,2,5]thiadiazolo[3,4-e]thieno[2 '',3 '':4',5']thieno[2',3':4,5]pyrrolo[3,2-g]thieno[2',3':4,5]thieno[3,2-b]indole-2,10-diyl)bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile (Y6) is used as the acceptor. Another polymer is added as the second donor to improve the stability. As expected, the deep and light blue bands dominate the decay under visible light. After about 1200 h of blue irradiation, the devices enter a relatively stable state up to 3000 h of tracking, in sharp contrast to the continuous decay under UV. No chemical reaction is observed under blue light. Years of outdoor lifetime for nonfullerene OPV are projected with the UV filter.
Subjects
nonfullerene acceptors
organic photovoltaics
sunlight stability
ternary systems
visible light
SDGs
Publisher
Wiley
Type
journal article