Dithieno[3,2-b:2′,3′-d]pyrrole and benzothiadiazole-based semicrystalline copolymer for photovoltaic devices with indene-C60 Bisadduct

Wonho Lee, Gi Hwan Kim, Eunjae Jeong, Xiaowei Wang, Seungjib Yum, Seo Jin Ko, Sungu Hwang, Jin Young Kim, Han Young Woo

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A semicrystalline low-bandgap polymer (PDTPBT) based on alternating dithienopyrrole and benzothiadiazole moieties as a pair of the indene-C 60 bisadduct (ICBA) for polymeric solar cells is reported. The lowest unoccupied molecular orbital (LUMO) level of PDTPBT is measured to be -3.47 eV, ensuring sufficient energy offset for photoinduced charge transfer to ICBA. Photovoltaic cells are fabricated with ICBA and [6,6]-phenyl-C 71-butyric acid methyl ester (PC71BM) as an acceptor. By replacing PC71BM with ICBA, the open-circuit voltage is increased by 0.23 V and the resulting power conversion efficiency is improved from 1.17% to 1.71%. To optimize the ICBA-based devices, crystalline low-bandgap structures should be designed carefully as a pair of ICBA by considering the energy-level offset for charge separation and crystalline interchain ordering, for minimizing the intercalated ICBAs inside the polymer domain. A semicrystalline copolymer based on dithienopyrrole and benzothiadiazole is investigated as an active layer with the indene-C60 bisadduct (ICBA) for photovoltaic devices. A low-bandgap structure should be carefully designed as a pair of ICBA by considering the energy level offset for exciton separation and crystalline ordering for minimizing the intercalated ICBAs inside the polymer domain.

Original languageEnglish
Pages (from-to)2083-2090
Number of pages8
JournalMacromolecular Chemistry and Physics
Volume214
Issue number18
DOIs
Publication statusPublished - 2013 Sep 1
Externally publishedYes

Fingerprint

indene
Pyrroles
pyrroles
copolymers
Energy gap
Butyric acid
Copolymers
Crystalline materials
Electron energy levels
Esters
Polymers
Photovoltaic cells
Molecular orbitals
Open circuit voltage
Excitons
Conversion efficiency
Butyric Acid
butyric acid
Charge transfer
Solar cells

Keywords

  • charge transfer
  • dithienopyrrole
  • indene-C60 bisadduct (ICBA)
  • polymer solar cells
  • wide-angle X-ray scattering (WAXS)

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Cite this

Dithieno[3,2-b:2′,3′-d]pyrrole and benzothiadiazole-based semicrystalline copolymer for photovoltaic devices with indene-C60 Bisadduct. / Lee, Wonho; Kim, Gi Hwan; Jeong, Eunjae; Wang, Xiaowei; Yum, Seungjib; Ko, Seo Jin; Hwang, Sungu; Kim, Jin Young; Woo, Han Young.

In: Macromolecular Chemistry and Physics, Vol. 214, No. 18, 01.09.2013, p. 2083-2090.

Research output: Contribution to journalArticle

Lee, Wonho ; Kim, Gi Hwan ; Jeong, Eunjae ; Wang, Xiaowei ; Yum, Seungjib ; Ko, Seo Jin ; Hwang, Sungu ; Kim, Jin Young ; Woo, Han Young. / Dithieno[3,2-b:2′,3′-d]pyrrole and benzothiadiazole-based semicrystalline copolymer for photovoltaic devices with indene-C60 Bisadduct. In: Macromolecular Chemistry and Physics. 2013 ; Vol. 214, No. 18. pp. 2083-2090.
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abstract = "A semicrystalline low-bandgap polymer (PDTPBT) based on alternating dithienopyrrole and benzothiadiazole moieties as a pair of the indene-C 60 bisadduct (ICBA) for polymeric solar cells is reported. The lowest unoccupied molecular orbital (LUMO) level of PDTPBT is measured to be -3.47 eV, ensuring sufficient energy offset for photoinduced charge transfer to ICBA. Photovoltaic cells are fabricated with ICBA and [6,6]-phenyl-C 71-butyric acid methyl ester (PC71BM) as an acceptor. By replacing PC71BM with ICBA, the open-circuit voltage is increased by 0.23 V and the resulting power conversion efficiency is improved from 1.17{\%} to 1.71{\%}. To optimize the ICBA-based devices, crystalline low-bandgap structures should be designed carefully as a pair of ICBA by considering the energy-level offset for charge separation and crystalline interchain ordering, for minimizing the intercalated ICBAs inside the polymer domain. A semicrystalline copolymer based on dithienopyrrole and benzothiadiazole is investigated as an active layer with the indene-C60 bisadduct (ICBA) for photovoltaic devices. A low-bandgap structure should be carefully designed as a pair of ICBA by considering the energy level offset for exciton separation and crystalline ordering for minimizing the intercalated ICBAs inside the polymer domain.",
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AU - Kim, Gi Hwan

AU - Jeong, Eunjae

AU - Wang, Xiaowei

AU - Yum, Seungjib

AU - Ko, Seo Jin

AU - Hwang, Sungu

AU - Kim, Jin Young

AU - Woo, Han Young

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