Synthesis, characterization and photovoltaic properties of two-dimensional conjugated polybenzodithiophene derivatives appending diketopyrrolopyrrole units as side chain

被引：12

作者：

Chen, Jianhua ^{[1
]}

Xiao, Manjun ^{[1
,2
]}

Su, Wenyan ^{[1
]}

Duan, Xiongwei ^{[1
]}

Duan, Linrui ^{[1
]}

Peng, Wenhong ^{[1
]}

Tan, Hua ^{[1
,3
]}

Yang, Renqiang ^{[2
]}

Zhu, Weiguo ^{[1
,3
]}

机构：

[1] Xiangtan Univ, Coll Chem, Key Lab Environm Friendly Chem & Applicat, Minist Educ, Xiangtan 411105, Peoples R China

[2] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China

[3] S China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510000, Guangdong, Peoples R China

来源：

POLYMER | 2014年 / 55卷 / 19期

基金：

湖南省自然科学基金; 中国国家自然科学基金;

关键词：

Two-dimensional conjugated polymer; Benzodithiophene; Diketopyrrolopyrrole; ORGANIC SOLAR-CELLS; POWER CONVERSION EFFICIENCY; PROCESSING ADDITIVES; PERFORMANCE; POLYMER; TANDEM; COPOLYMERS;

D O I：

10.1016/j.polymer.2014.07.055

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Two side-chain donor-acceptor (D-A) narrow-band-gap two-dimensional (2D) conjugated polymers of POBDTDPPs and PTBDTDPPs with benzodithiophene (BDT) as D unit and appending diketopyrrolopyrrole (DPP) as A unit were designed and synthesized. The optical, thermal, electrochemical and photovoltaic properties have been investigated. It was found that both polymers exhibit better solution processability and a deeper HOMO energy level relative to its corresponding main-chain conjugated polymers (PBDT-DPP). Moreover, the PTBDTDPPs with an additional di(alkylthiophene)- substituted BDT unit shows a deeper HOMO energy level than the POBDTDPPs with a dialkoxy- substituted BDT unit. Using PTBDTDPPs as an electron donor and [6,6]-phenyl-C-71-butyric acid methyl ester as an electron acceptor, the resulting polymer solar cells (PSCs) exhibited meliorative photovoltaic properties with a power conversion efficiency (PCE) of 2.92% and open circuit voltage (V-oc) of 0.94 V. The PCE and V-oc levels are 1.52-2.92 and 1.14-1.18 times higher than those in the PBDT-DPP- and POBDTDPPs-based PSCs, respectively. This work demonstrates a good example for tuning energy level and photovoltaic properties of the polymers by the application of 2D conjugated structure. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：4857 / 4864

页数：8

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