Keywords
1
2
2-f:2’
3-benzothiadiazole
3’-h]quinoxaline
dithieno[3
hole transport materials
perovskite solar cells
PSCs.
Stille cross-coupling
Abstract
Two novel conjugated polymers comprised of 2,3-R2-di- thieno[3,2-f:2’,3’-h]quinoxaline, where R is 3’-(octyloxy)- phenyl (P1) or 2’-(2-ethylhexyl)thiophen-4’-yl (P2), and 2,1,3-benzothiadiazole have been synthesized using the Stille cross-coupling reaction. The synthesized polymers were investigated as hole transport layer (HTL) materials in perovskite solar cells. Polymer P2 as an HTL material provided improved short-circuit current and open-circuit voltage and, correspondingly, enhanced power conversion efficiency of perovskite solar cells compared to that of polymer P1.
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