Triisopropylsilylacetylene-functionalised anthracene-alt-benzothiadiazole copolymers for application in bulk heterojunction solar cells

被引：5

作者：

Cartwright, Luke ^{[1
]}

Taylor, Lois. J. ^{[1
]}

Yi, Hunan ^{[1
]}

Iraqi, Ahmed ^{[1
]}

Zhang, Yiwei ^{[2
]}

Scarratt, Nicholas. W. ^{[2
]}

Wang, Tao ^{[3
]}

Lidzey, David. G. ^{[2
]}

机构：

[1] Univ Sheffield, Dept Chem, Sheffield S3 7HF, S Yorkshire, England

[2] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

[3] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Peoples R China

来源：

RSC ADVANCES | 2015年 / 5卷 / 123期

基金：

英国工程与自然科学研究理事会;

关键词：

DONOR-ACCEPTOR COPOLYMERS; TO-ROLL FABRICATION; CONJUGATED POLYMERS; HIGH-PERFORMANCE; BAND-GAP; PHOTOVOLTAIC PERFORMANCE; PHOTOPHYSICAL PROPERTIES; ORGANIC SEMICONDUCTORS; FLUORINE SUBSTITUTION; EFFICIENT;

D O I：

10.1039/c5ra20927g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Three triisopropylsilylacetylene-functionalised anthracene (TIPSAnt) based polymers were synthesised by copolymerising TIPSAnt with either dithienyl-5,6-difluoro-benzo[c]-[ 1,2,5] thiadiazole, dithienyl-benzo[c] [1,2,5] thiadiazole or dibithiophenyl-benzo[c]-[ 1,2,5] thiadiazole to yield PTATffBT, PTATBT-8 and PTAT2BT-8, respectively. PTAT2BT-8 demonstrated a reduced optical and electrochemical band gap, relative to PTATffBT and PTATBT-8. The HOMO level of PTAT2BT-8 (-5.32 eV) is significantly shallower compared to its counterparts. This can be attributed to increased intramolecular charge transfer along the polymer backbone; a consequence of the incorporation of additional thiophene spacer units. The photovoltaic properties of the polymers were investigated by fabricating bulk heterojunction (BHJ) polymer solar cells using PC70BM as the electron acceptor. PTATffBT displayed limited solubility in common organic solvents and could not be used for the fabrication of photovoltaic cells. Optimised photovoltaic devices fabricated from PTATBT-8 and PTAT2BT-8 demonstrated power conversion efficiencies of 2.36% and 3.15%, respectively. PTAT2BT-8 provided better efficiencies chiefly as a result of better J(sc) and FF values.

引用

页码：101607 / 101615

页数：9

共 51 条

[51] Development of Fluorinated Benzothiadiazole as a Structural Unit for a Polymer Solar Cell of 7% Efficiency [J].

Zhou, Huaxing ;

Yang, Liqiang ;

Stuart, Andrew C. ;

Price, Samuel C. ;

Liu, Shubin ;

You, Wei .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2011, 50 (13) :2995-2998

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