Benzotriazole and benzothiadiazole containing conjugated copolymers for organic solar cell applications

APAYDIN, Dogukan Hazar
Yildiz, Dilber Esra
Toppare, Levent Kamil
Çırpan, Ali
2-Dodecyl benzotriazole (BTz) and benzothiadiazole (BTd) containing copolymers poly(4-(2-dodecyl-2H-benzo[d][1,2,3]triazol-4-yl)benzo[c][1,2,5]thiadiazole (P1), poly(4-(5-(2-dodecyl-7-(thiophen-2yl)-2H-benzo[d][1,2,3]triazol-4-yl)thiophen-2-yl)benzo[c][1,2,5]thiadiazole (P2) and poly(4-(5-(2-dodecyl-7-(4-hexylthiophen-2-yl)-2H-benzo[d] [1,2,3]triazol-4-yl)-3-hexylthiophen-2-yl) benzo[c][1,2,5] thiadiazole (P3) were synthesized via Suzuki polycondensation. We report the application of conjugated copolymers in bulk heterojunction photovoltaic devices. When the copolymers were blended with [6,6]phenyl-C-61-butyric acid methyl ester (PCBM), P2 showed the best performance with an open circuit voltage (V,), a short-circuit current density (J(sc)) and a power conversion efficiency (PCE) of 0.45 V, 3.48 mA cm(-2) and 0.45%, respectively, under AM 1.5G illumination conditions (100 mW cm(-2)). The hole mobilities of the devices were calculated from J-V curves using Space Charge Limited Current (SCLC) method and the maximum mobility value was found to be 3.15 x 10(-5) cm(2) V-1 s(-1) the P2:PCBM blend.
Citation Formats
M. KARAKUS, D. H. APAYDIN, D. E. Yildiz, L. K. Toppare, and A. Çırpan, “Benzotriazole and benzothiadiazole containing conjugated copolymers for organic solar cell applications,” POLYMER, vol. 53, no. 6, pp. 1198–1202, 2012, Accessed: 00, 2020. [Online]. Available: