Cyclopentadithiophene-benzothiadiazole oligomers and polymers; synthesis, characterisation, field-effect transistor and photovoltaic characteristics

被引：60

作者：

Horie, Masaki ^{[1
,3
]}

Kettle, Jeff ^{[2
,3
]}

Yu, Chin-Yang ^{[3
,4
]}

Majewski, Leszek A. ^{[5
]}

Chang, Shu-Wei ^{[1
]}

Kirkpatrick, James ^{[6
]}

Tuladhar, Sachetan M. ^{[7
]}

Nelson, Jenny ^{[7
]}

Saunders, Brian R. ^{[8
]}

Turner, Michael L. ^{[3
]}

机构：

[1] Natl Tsing Hua Univ, Frontier Res Ctr Fundamental & Appl Sci Matters, Dept Chem Engn, Hsinchu 30013, Taiwan

[2] Bangor Univ, Sch Elect Engn, Bangor LL57 1UT, Gwynedd, Wales

[3] Univ Manchester, Organ Mat Innovat Ctr, Sch Chem, Manchester M13 9PL, Lancs, England

[4] Natl Taiwan Univ Sci & Technol, Dept Mat Sci & Engn, Taipei 106, Taiwan

[5] Univ Manchester, Sch Elect & Elect Engn, Manchester M60 1QD, Lancs, England

[6] Univ Oxford, Oxford Martin Sch, Oxford OX1 2JD, England

[7] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London, England

[8] Univ Manchester, Sch Mat, Manchester M1 7HS, Lancs, England

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2012年 / 22卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

THIN-FILM TRANSISTORS; ORGANIC SOLAR-CELLS; CRYSTALLINE SEMICONDUCTING POLYMERS; DONOR-ACCEPTOR COPOLYMERS; CONJUGATED POLYMER; LOW-BANDGAP; THIOPHENE COPOLYMERS; BULK-HETEROJUNCTIONS; CHARGE-TRANSPORT; POLYTHIOPHENES;

D O I：

10.1039/c1jm12449h

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：

Conjugated oligomers with various ratios of cyclopentadithiophene (CPDT) to benzothiadiazole (BT) repeating units are reported. These oligomers can be polymerised to high molecular weight polymers (M-n > 100k) by oxidative polymerisation using iron(m)chloride. The electronic properties of these materials were examined by cyclic voltammetry and UV-vis spectroscopy and the results compared to those calculated using density functional theory (DFT). Polymers with optimum ratios of CPDT : BT (2 : 1) units show hole mobilities in excess of 10(-2) cm(2) V-1 s(-1) as the active layer in organic field effect transistors (OFETs). Bulk heterojunction organic photovoltaic (OPV) devices of these polymers with PCBM as the electron acceptor show a power conversion efficiency of 2.1% when processed in the absence of any additives. The reported OFET performance is significantly higher than the parent PCPDTBT alternating copolymer (CPDT : BT = 1 : 1) and also shows a moderate improvement in OPV performance.

引用

页码：381 / 389

页数：9

共 84 条

[21] High molecular weights, polydispersities, and annealing temperatures in the optimization of bulk-heterojunction photovoltaic cells based on poly(3-hexylthiophene) or poly(3-butylthiophene) [J].