The performance of new polymer solar cells based on thiophene and thienyl-quinoxaline with the post treatments

Bowen Gao; Chao Gao; Haimei Wu; Wenxiu Que; Wei Wei

doi:10.1016/j.matlet.2014.01.140

The performance of new polymer solar cells based on thiophene and thienyl-quinoxaline with the post treatments

Bowen Gao
, Chao Gao
, Haimei Wu
, Wenxiu Que
, Wei Wei

Faculty of Electronic and Information Engineering

Chinese Academy of Sciences
Xi'an Jiaotong University
Xian Modern Chemwastry Research Institute

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

A new low band gap (optical band gap=1.62 eV) polymer (TTQ) based on thiophene and thienyl-quinoxaline by substituting phenyl in quinoxaline unit for thiophene rings was synthesized and characterized for application in polymer solar cells (PSCs). The optical band gap (E_g^opt) deduced from the onset (765 nm) of the polymer absorption spectrum in the films was 1.62 eV, which was less than those of the polymers TQ and FTQ and was closer to the ideal band gap of a donor for BHJ polymer solar cell applications. For the optimized polymer solar cell of TTQ:PC₇₁BM, 1:1 w/w, in DCB solution, a PCE over 1.41% with V_oc of 0.70 V, J_sc of 3.89 mA/cm², and fill factor (FF) of 55% under AM1.5 conditions was achieved by solvent annealing in comparing with those of solvent surface treatment devices (PCE of 1.34%) and thermal annealing devices (PCE of 1.10%).

Original language	English
Pages (from-to)	74-77
Number of pages	4
Journal	Materials Letters
Volume	122
DOIs	https://doi.org/10.1016/j.matlet.2014.01.140
State	Published - 1 May 2014

Keywords

Polymer solar cell
Solvent annealing
Solvent surface treatment
Thienyl-quinoxaline

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title = "The performance of new polymer solar cells based on thiophene and thienyl-quinoxaline with the post treatments",

abstract = "A new low band gap (optical band gap=1.62 eV) polymer (TTQ) based on thiophene and thienyl-quinoxaline by substituting phenyl in quinoxaline unit for thiophene rings was synthesized and characterized for application in polymer solar cells (PSCs). The optical band gap (Egopt) deduced from the onset (765 nm) of the polymer absorption spectrum in the films was 1.62 eV, which was less than those of the polymers TQ and FTQ and was closer to the ideal band gap of a donor for BHJ polymer solar cell applications. For the optimized polymer solar cell of TTQ:PC71BM, 1:1 w/w, in DCB solution, a PCE over 1.41\% with Voc of 0.70 V, Jsc of 3.89 mA/cm2, and fill factor (FF) of 55\% under AM1.5 conditions was achieved by solvent annealing in comparing with those of solvent surface treatment devices (PCE of 1.34\%) and thermal annealing devices (PCE of 1.10\%).",

keywords = "Polymer solar cell, Solvent annealing, Solvent surface treatment, Thienyl-quinoxaline",

author = "Bowen Gao and Chao Gao and Haimei Wu and Wenxiu Que and Wei Wei",

year = "2014",

month = may,

day = "1",

doi = "10.1016/j.matlet.2014.01.140",

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pages = "74--77",

journal = "Materials Letters",

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T1 - The performance of new polymer solar cells based on thiophene and thienyl-quinoxaline with the post treatments

AU - Gao, Bowen

AU - Gao, Chao

AU - Wu, Haimei

AU - Que, Wenxiu

AU - Wei, Wei

PY - 2014/5/1

Y1 - 2014/5/1

N2 - A new low band gap (optical band gap=1.62 eV) polymer (TTQ) based on thiophene and thienyl-quinoxaline by substituting phenyl in quinoxaline unit for thiophene rings was synthesized and characterized for application in polymer solar cells (PSCs). The optical band gap (Egopt) deduced from the onset (765 nm) of the polymer absorption spectrum in the films was 1.62 eV, which was less than those of the polymers TQ and FTQ and was closer to the ideal band gap of a donor for BHJ polymer solar cell applications. For the optimized polymer solar cell of TTQ:PC71BM, 1:1 w/w, in DCB solution, a PCE over 1.41% with Voc of 0.70 V, Jsc of 3.89 mA/cm2, and fill factor (FF) of 55% under AM1.5 conditions was achieved by solvent annealing in comparing with those of solvent surface treatment devices (PCE of 1.34%) and thermal annealing devices (PCE of 1.10%).

AB - A new low band gap (optical band gap=1.62 eV) polymer (TTQ) based on thiophene and thienyl-quinoxaline by substituting phenyl in quinoxaline unit for thiophene rings was synthesized and characterized for application in polymer solar cells (PSCs). The optical band gap (Egopt) deduced from the onset (765 nm) of the polymer absorption spectrum in the films was 1.62 eV, which was less than those of the polymers TQ and FTQ and was closer to the ideal band gap of a donor for BHJ polymer solar cell applications. For the optimized polymer solar cell of TTQ:PC71BM, 1:1 w/w, in DCB solution, a PCE over 1.41% with Voc of 0.70 V, Jsc of 3.89 mA/cm2, and fill factor (FF) of 55% under AM1.5 conditions was achieved by solvent annealing in comparing with those of solvent surface treatment devices (PCE of 1.34%) and thermal annealing devices (PCE of 1.10%).

KW - Polymer solar cell

KW - Solvent annealing

KW - Solvent surface treatment

KW - Thienyl-quinoxaline

UR - https://www.scopus.com/pages/publications/84894670895

U2 - 10.1016/j.matlet.2014.01.140

DO - 10.1016/j.matlet.2014.01.140

M3 - 文章

AN - SCOPUS:84894670895

SN - 0167-577X

VL - 122

SP - 74

EP - 77

JO - Materials Letters

JF - Materials Letters

ER -

The performance of new polymer solar cells based on thiophene and thienyl-quinoxaline with the post treatments

Abstract

Keywords

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