Enhanced performance of organic photovoltaic cells fabricated with a methyl thiophene-3-carboxylate-containing alternating conjugated copolymer

Min Ju Cho, Jangwon Seo, Kyung Hwan Kim, Dong Hoon Choi, Paras N. Prasad

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

A new donor-acceptor copolymer, containing benzodithiophene (BDT) and methyl thiophene-3-carboxylate (3MT) units, is designed and synthesized for polymer solar cells (PSCs). The 3MT unit is used as an electron acceptor unit in this copolymer to provide a lower highest occupied molecular orbital (HOMO) level for obtaining polymer solar cells with a higher open-circuit voltage (V OC). The resulting bulk heterojunction PSC made of the copolymer and [6,6]-phenyl-C71-butyric acid methyl ester (PC 71BM) exhibits a power conversion efficiency (PCE) up to 4.52%, a short circuit current (J SC) of 10.5 mA·cm- 2, and a V OC of 0.86 V. A new donor-acceptor type copolymer containing methyl thiophene-3-carboxylate is designed and synthesized to obtain a lower highest occupied molecular orbital (HOMO) level and strong inter- or intra-molecular interaction between polymers. The photovoltaic device based-on this copolymer exhibits a power conversion efficiency up to 4.52% and an open-circuit voltage of 0.86 V.

Original languageEnglish
Pages (from-to)146-151
Number of pages6
JournalMacromolecular Rapid Communications
Volume33
Issue number2
DOIs
Publication statusPublished - 2012 Jan 27

Fingerprint

Thiophenes
Photovoltaic cells
Thiophene
Copolymers
Molecular orbitals
Open circuit voltage
Conversion efficiency
Butyric acid
Butyric Acid
Molecular interactions
Short circuit currents
Heterojunctions
Esters
Polymers
Electrons
Polymer solar cells

Keywords

  • bulk heterojunction
  • conjugated polymers
  • copolymerization
  • PCBM
  • polymer solar cells

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Enhanced performance of organic photovoltaic cells fabricated with a methyl thiophene-3-carboxylate-containing alternating conjugated copolymer. / Cho, Min Ju; Seo, Jangwon; Kim, Kyung Hwan; Choi, Dong Hoon; Prasad, Paras N.

In: Macromolecular Rapid Communications, Vol. 33, No. 2, 27.01.2012, p. 146-151.

Research output: Contribution to journalArticle

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