Effect of side chain position on solar cell performance in cyclopentadithiophene-based copolymers

Sang Kyu Lee; Jung Hwa Seo; Nam Sung Cho; Shinuk Cho

doi:10.1016/j.tsf.2012.04.009

Effect of side chain position on solar cell performance in cyclopentadithiophene-based copolymers

Sang Kyu Lee, Jung Hwa Seo, Nam Sung Cho, Shinuk Cho

Department of Physics

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

10 Scopus citations

Abstract

The photovoltaic properties of a series of low band-gap conjugated copolymers, in which alkyl side chains were substituted at various positions, were investigated using donor-acceptor (D-A) conjugated copolymers consisting of a cyclopentadithiophene derivative and dithienyl-benzothiadiazole. The base polymer, which has no alkyl side chains, yielded promising power conversion efficiency of 3.8%. Polymers with alkyl side chains, however, exhibited significantly decreased performance. In addition, the effects of processing additive became negligible. The results indicate that substituted side chains, which were introduced to improve solubility, critically affected the optical and electronic properties of D-A conjugated copolymers. Furthermore, the position of the side chain was also very important for controlling the morphological properties of the D-A conjugated copolymers.

Original language	English
Pages (from-to)	5438-5441
Number of pages	4
Journal	Thin Solid Films
Volume	520
Issue number	16
DOIs	https://doi.org/10.1016/j.tsf.2012.04.009
State	Published - 1 Jun 2012

Keywords

Donnors-acceptors conjugated copolymer
Polymer solar cells
Substituted side chain

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.tsf.2012.04.009

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title = "Effect of side chain position on solar cell performance in cyclopentadithiophene-based copolymers",

abstract = "The photovoltaic properties of a series of low band-gap conjugated copolymers, in which alkyl side chains were substituted at various positions, were investigated using donor-acceptor (D-A) conjugated copolymers consisting of a cyclopentadithiophene derivative and dithienyl-benzothiadiazole. The base polymer, which has no alkyl side chains, yielded promising power conversion efficiency of 3.8%. Polymers with alkyl side chains, however, exhibited significantly decreased performance. In addition, the effects of processing additive became negligible. The results indicate that substituted side chains, which were introduced to improve solubility, critically affected the optical and electronic properties of D-A conjugated copolymers. Furthermore, the position of the side chain was also very important for controlling the morphological properties of the D-A conjugated copolymers.",

keywords = "Donnors-acceptors conjugated copolymer, Polymer solar cells, Substituted side chain",

author = "Lee, {Sang Kyu} and Seo, {Jung Hwa} and Cho, {Nam Sung} and Shinuk Cho",

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TY - JOUR

T1 - Effect of side chain position on solar cell performance in cyclopentadithiophene-based copolymers

AU - Lee, Sang Kyu

AU - Seo, Jung Hwa

AU - Cho, Nam Sung

AU - Cho, Shinuk

PY - 2012/6/1

Y1 - 2012/6/1

N2 - The photovoltaic properties of a series of low band-gap conjugated copolymers, in which alkyl side chains were substituted at various positions, were investigated using donor-acceptor (D-A) conjugated copolymers consisting of a cyclopentadithiophene derivative and dithienyl-benzothiadiazole. The base polymer, which has no alkyl side chains, yielded promising power conversion efficiency of 3.8%. Polymers with alkyl side chains, however, exhibited significantly decreased performance. In addition, the effects of processing additive became negligible. The results indicate that substituted side chains, which were introduced to improve solubility, critically affected the optical and electronic properties of D-A conjugated copolymers. Furthermore, the position of the side chain was also very important for controlling the morphological properties of the D-A conjugated copolymers.

AB - The photovoltaic properties of a series of low band-gap conjugated copolymers, in which alkyl side chains were substituted at various positions, were investigated using donor-acceptor (D-A) conjugated copolymers consisting of a cyclopentadithiophene derivative and dithienyl-benzothiadiazole. The base polymer, which has no alkyl side chains, yielded promising power conversion efficiency of 3.8%. Polymers with alkyl side chains, however, exhibited significantly decreased performance. In addition, the effects of processing additive became negligible. The results indicate that substituted side chains, which were introduced to improve solubility, critically affected the optical and electronic properties of D-A conjugated copolymers. Furthermore, the position of the side chain was also very important for controlling the morphological properties of the D-A conjugated copolymers.

KW - Donnors-acceptors conjugated copolymer

KW - Polymer solar cells

KW - Substituted side chain

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DO - 10.1016/j.tsf.2012.04.009

M3 - Article

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SN - 0040-6090

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JO - Thin Solid Films

JF - Thin Solid Films

IS - 16

ER -

Effect of side chain position on solar cell performance in cyclopentadithiophene-based copolymers

Abstract

Keywords

UN SDGs

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