Enhanced photocurrent generation by high molecular weight random copolymer consisting of benzothiadiazole and quinoxaline as donor materials

被引：16

作者：

Kim, Doo Hun ^{[1
]}

Song, Ho Jun ^{[1
]}

Heo, Soo Won ^{[1
]}

Song, Kwan Wook ^{[1
]}

Moon, Doo Kyung ^{[1
]}

机构：

[1] Konkuk Univ, Dept Mat Chem & Engn, Seoul 143701, South Korea

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2014年 / 120卷

基金：

新加坡国家研究基金会;

关键词：

Randomcopolymer; OPVs; Conjugated polymer; Benzothiadiazole; Quinoxaline; SOLAR-CELLS; ORGANIC PHOTOVOLTAICS; CONJUGATED POLYMERS; CHARGE-TRANSFER; HOLE MOBILITY; SEMICONDUCTORS; QUINACRIDONE; THIOPHENE;

D O I：

10.1016/j.solmat.2013.08.021

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

We synthesized organic photovoltaic materials that have high molecular weight and good solubility. A new random copolymer named poly[carbazole-co-dithienylbenzothiadiazole-co-dithienylquinoxaline] (PC-TBT-TQ) was polymerized through the Suzuki coupling reaction. PC-TBT-TQ was dissolved in a common organic solvent, and its M-n indicates a high molecular weight of 216.2 kg/mol. According to the result of thermal analysis, very high thermal stability was observed, with an approximately 5 wt% weight loss at 440 degrees C. The optical band gap of PC-TBT-TQ (1.89 eV) is slightly higher than that of PCDTBT (1.87 eV). The HOMO and LUMO levels of PC-TBT-TQ (HOMO level: 5.45 eV, LUMO level: 3.56 eV) are similar to those of PCDTBT (HOMO level: 5.45 eV, LUMO level: 3.58 eV). The OPV properties of the polymer were assessed by fabricating bulk-heterojunction polymer solar cells in the ITO/PEDOT:PSS/active-layer/BaF2/Ba/Al structure. When PC-TBT-TQ and PC71 BM were fabricated in a 1:4 ratio, the open-circuit voltage (V-OC), short-circuit current (J(SC)), fill factor (FF) and power conversion efficiency (PCE) were 0.83 V, 9.5 mA/cm(2), 43.3% and 3.5%, respectively. (C) 2013 Elsevier B.V. All rights reserved.

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页码：94 / 101

页数：8

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