Synthesis and Search for Design Principles of New Electron Accepting Polymers for All-Polymer Solar Cells

被引：105

作者：

Jung, In Hwan ^{[1
,2
]}

Lo, Wai-Yip ^{[1
,2
]}

Jang, Jaeyoung ^{[1
,2
]}

Chen, Wei ^{[3
]}

Zhao, Donglin ^{[1
,2
]}

Landry, Erik S. ^{[3
]}

Lu, Luyao ^{[1
,2
]}

Talapin, Dmitri V. ^{[1
,2
,4
]}

Yu, Luping ^{[1
,2
]}

机构：

[1] Univ Chicago, Dept Chem, Chicago, IL 60637 USA

[2] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA

[3] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[4] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA

来源：

CHEMISTRY OF MATERIALS | 2014年 / 26卷 / 11期

基金：

美国国家科学基金会;

关键词：

FIELD-EFFECT TRANSISTORS; CONJUGATED POLYMERS; N-TYPE; PHOTOVOLTAIC CELLS; FILL FACTOR; MOBILITY; DONOR; PERFORMANCE; EFFICIENCY; TRANSPORT;

D O I：

10.1021/cm500832h

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：

New electron withdrawing monomers, thieno-[2',3':5',6']pyrido[3,4-g] thieno [3,2-c] isoquinoline-5,11(4H,10H)-dione (TPTI) and fluorenedicyclopentathiophene dimalononitrile (CN), have been developed and used to form 12 alternating polymers having different monomer combinations: (a) weak donating monomer-strong accepting monomer, (b) weak accepting monomer-strong accepting monomer, (c) weak accepting monomer-weak accepting monomer, and (d) strong donating monomer-strong accepting monomer. It was found that lowest unoccupied molecular orbital (LUMO) energy levels of polymers are significantly determined by stronger electron accepting monomers and highest occupied molecular orbital (HOMO) energy levels by the weak electron accepting monomers. In addition, fluorescent quantum yields of the TPTI-based polymers in chloroform solution are significantly decreased as the LUMO energy levels of the TPTI series of polymers become deeper. The quantum yield was found to be closely related with the photovoltaic properties, which reflects the effect of internal polarization on the photovoltaic properties. Only the electron accepting polymers showing SCLC mobility higher than 10(-4) cm(2)/(Vs) exhibited photovoltaic performance in blend films with a donor polymer, and the PTB7:PNPDI (1:1.8 w/w) device exhibited the highest power conversion efficiency of 1.03% (V-oc = 0.69 V, J(cc) = -4.13 mA/cm(2), FF = 0.36) under AM 1.5G condition, 100 W/cm(2). We provide a large set of systematic structure-property relationships, which gives new perspectives for the design of electron accepting materials.

引用

页码：3450 / 3459

页数：10