Carbazole-Substituted Triphenylamine and Diketopyrrolopyrrole Alternating Copolymer for Photovoltaic Cells

被引：13
作者：
Bian, Linyi [1 ]
Yang, Dong [2 ,3 ]
Yin, Liangming [1 ]
Zhang, Jian [2 ]
Tang, Weihua [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Minist Educ, Key Lab Soft Chem & Funct Mat, Nanjing 210094, Jiangsu, Peoples R China
[2] Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
[3] Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
来源：
MACROMOLECULAR CHEMISTRY AND PHYSICS | 2013年 / 214卷 / 19期
基金：
中国国家自然科学基金;
关键词：
bulk heterojunction; polymer solar cells; narrow bandgap polymers; two-dimensional polymers; POLYMER SOLAR-CELLS; THIN-FILM TRANSISTORS; BAND-GAP POLYMERS; ENERGY-CONVERSION EFFICIENCY; OPEN-CIRCUIT VOLTAGE; CONJUGATED POLYMERS; HIGH-MOBILITY; SEMICONDUCTING POLYMER; TANDEM POLYMER; HOLE MOBILITY;
D O I：
10.1002/macp.201300356
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A new alternating conjugated polymer (PTCDPP) of carbazole-substituted triarylamine and diketopyrrolopyrrole is prepared and characterized in detail. The polymer exhibits two strong absorption bands at 345 and 600 nm. With highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels of -5.13 eV and -3.67 eV, PTCDPP displays an energy gap of 1.66 eV. PTCDPP-based bulk heterojunction solar cells with a structure of fluorinated tin oxide (FTO)/TiO2/PTCDPP:[6,6]-phenyl-C61-butyric acid methyl ester (PCBM)/MoO3/Ag are fabricated. The devices are optimized by adjusting the composition of the PTCDPP:PCBM active layer, thermal treatment, and addition of processing additives. The device based on PTCDPP:PCBM (1:4, w/w) shows a power conversion efficiency (PCE) of 2.31%, with a short-circuit current of 4.17 mA cm(-2), an open-circuit voltage of 0.79 V, and a fill factor of 0.35. The best cell performance (2.65% PCE) is achieved by using 1,8-diiodooctane (3%, v/v) as a processing additive and annealing the active layer at 80 degrees C.
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页码：2136 / 2143
页数：8
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