Diketopyrrolopyrrole-based conjugated polymers containing alkyl and aryl side-chains for bulk heterojunction solar cells

被引:2
作者
Park, Su Jung [1 ]
Jung, Ji Eun [1 ]
Kang, Min Kwan [1 ]
Na, Yang Ho [1 ]
Song, Hyun Hoon [1 ]
Kang, Jae Wook [2 ]
Baek, Nam Seob [3 ]
Kim, Tae-Dong [1 ]
机构
[1] Hannam Univ, Dept Adv Mat, Taejon 305811, South Korea
[2] Chonbuk Natl Univ, Polymer Mat Fus Res Ctr, Dept Flexible & Printable Elect, Jeonju 561756, South Korea
[3] Chem Opt Inc, Taejon 305510, South Korea
基金
新加坡国家研究基金会;
关键词
DPP conjugated polymers; Side-chain engineering; Bulk heterojunction solar cells; THIN-FILM TRANSISTORS; ORGANIC PHOTOVOLTAICS; PERFORMANCE; MOBILITY; SEMICONDUCTORS; EFFICIENCY;
D O I
10.1016/j.synthmet.2015.02.035
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A series of diketopyrrolopyrrole (DPP)-based conjugated polymers were synthesized with varied side groups such as alkyl and aryl side-chains on a DPP backbone. Their thermal, optical, and photovoltaic properties were investigated. After adding 2% of 1,8-diiodooctane (DIO) as a processing additive in active layers for the bulk heterojunction device, we could achieve the highest PCE of 2.02% with V-OC=0.68V, J(SC)=5.31 mA cm(-2), and FF=56.0% for PDPPT-s1:[70]PCBM (1:2). The device for PDPPT-as designed with asymmetrical side groups on the DPP units also showed good solar cell performance comparable with PDPPT-s1. These results suggest that the DIO additives can control side-chain interference on DPP units. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:221 / 227
页数:7
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