DTBDT-TTPD: a new dithienobenzodithiophene-based small molecule for use in efficient photovoltaic devices

被引：27

作者：

Cheon, Ye Rim ^{[1
,2
]}

Kim, Yu Jin ^{[3
]}

Back, Jang Yeol ^{[2
,4
]}

An, Tae Kyu ^{[3
]}

Park, Chan Eon ^{[3
]}

Kim, Yun-Hi ^{[1
,2
]}

机构：

[1] Gyeongsang Natl Univ, Dept Chem, Jinju 660701, South Korea

[2] Gyeongsang Natl Univ, ERI, Jinju 660701, South Korea

[3] Pohang Univ Sci & Technol, Dept Chem Engn, POSTECH Organ Elect Lab, Pohang 790784, South Korea

[4] Gyeongsang Natl Univ, Sch Mat Sci, Jinju 660701, South Korea

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2014年 / 2卷 / 39期

关键词：

HETEROJUNCTION SOLAR-CELLS; CONJUGATED POLYMERS; BULK; DIKETOPYRROLOPYRROLE; COPOLYMER; DESIGN;

D O I：

10.1039/c4ta03745f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We designed and synthesized a dithienobenzodithiophene (DTBDT)-based molecule with a planar molecular geometry, DTBDT-TTPD, for the fabrication of solution-processable organic solar cells (OSCs). DTBDT-TTPD exhibited both a low optical band gap of 1.88 eV and a low-lying highest occupied molecular orbital (HOMO) energy level of -5.61 eV, indicating that DTBDT-TTPD is a promising electron donor for use in OSCs. OSCs prepared with DTBDT-TTPD as the electron donor and 16,6]-phenyl-C-71-butyric acid methyl ester (PC71BM) as the electron acceptor were fabricated. An optimized power conversion efficiency of 4.98% with a high short circuit current of 10.6 mA cm(-2) was achieved after finely tuning the morphology through an annealing step. These results indicate that DTBDT-TTPD is an effective compound for producing very promising characteristics in small-molecule solar cell devices.

引用

页码：16443 / 16451

页数：9

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