Benzotriazole and benzothiadiazole containing conjugated copolymers for organic solar cell applications

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• 作者：Melike Karakus^a ; Doğ ; ukan Hazar Apaydı ; n^d ; Dilber Esra Yı ; ldı ; z^b ; Levent Toppare^a ; ^c ; ^d ; ^e ; Ali Cirpan^a ; ^d ; ^e ; ^{acirpan@metu.edu.tr}
• 关键词：Conjugated copolymer ; Organic solar cells ; Benzothiadiazole
• 刊名：Polymer
• 出版年：2012
• 期刊代码：83_00323861
• 类别：ms
• 出版时间：9 March, 2012
• 卷：53
• 期：6
• 页码：1198-1202
• 文件大小：613 K

摘要

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-C₆₁-butyric acid methyl ester (PCBM), P2 showed the best performance with an open circuit voltage (V_oc), a short-circuit current density (J_sc) and a power conversion efficiency (PCE) of 0.45聽V, 3.48聽mA聽cm^鈭? and 0.45%, respectively, under AM 1.5G illumination conditions (100聽mW聽cm^鈭?). 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聽脳聽10^鈭?聽cm²聽V^鈭?聽s^鈭? for the P2:PCBM blend.