Low bandgap carbazole copolymers containing an electron-withdrawing side chain for solar cell applications

Jung Feng Lee, Lien-Chung Hsu, Po I. Lee, Hung Yi Chuang, Ming Lun Yang, Jen-Sue Chen, Wei-Yang Chou

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A new series of low bandgap carbazole copolymers containing an electron-withdrawing moiety as a side chain, via Suzuki, Yamamoto, and Stille polymerization reactions has been synthesized. Their bandgaps and molecular energy levels can be tuned by copolymerizing with different conjugated electron-donating units. The resulting copolymers have low optical and electrochemical bandgaps. The optical bandgaps of the copolymers range from 1.79 to 1.24 eV. In order to investigate their photovoltaic properties, polymer solar cell devices based on low bandgap copolymers were fabricated with a structure of ITO/PEDOT:PSS/copolymers:PCBM/Al, under the illumination of AM 1.5 G, 100 mW/cm2. The power conversion efficiencies (PCE) of the polymer solar cells based on these low bandgap copolymers were measured. The best performance was obtained by using PC-CARB as the electron donor and 6,6-phenyl C71-butyric acid methyl ester (PC71BM) as the electron acceptor. The PCE of the solar cell based on PC-CARB/P71CBM (1:4) was 1.27% with an open-circuit voltage (Voc) of 0.65 V, and a short-circuit current (Jsc) of 6.69 mA/cm2.

Original languageEnglish
Pages (from-to)2795-2804
Number of pages10
JournalSolar Energy Materials and Solar Cells
Volume95
Issue number10
DOIs
Publication statusPublished - 2011 Oct 1

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Solar cells
Energy gap
Copolymers
Electrons
Conversion efficiency
Butyric acid
Butyric Acid
Optical band gaps
Open circuit voltage
Short circuit currents
Electron energy levels
carbazole
Esters
Lighting
Polymerization
Polymer solar cells

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

Cite this

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title = "Low bandgap carbazole copolymers containing an electron-withdrawing side chain for solar cell applications",
abstract = "A new series of low bandgap carbazole copolymers containing an electron-withdrawing moiety as a side chain, via Suzuki, Yamamoto, and Stille polymerization reactions has been synthesized. Their bandgaps and molecular energy levels can be tuned by copolymerizing with different conjugated electron-donating units. The resulting copolymers have low optical and electrochemical bandgaps. The optical bandgaps of the copolymers range from 1.79 to 1.24 eV. In order to investigate their photovoltaic properties, polymer solar cell devices based on low bandgap copolymers were fabricated with a structure of ITO/PEDOT:PSS/copolymers:PCBM/Al, under the illumination of AM 1.5 G, 100 mW/cm2. The power conversion efficiencies (PCE) of the polymer solar cells based on these low bandgap copolymers were measured. The best performance was obtained by using PC-CARB as the electron donor and 6,6-phenyl C71-butyric acid methyl ester (PC71BM) as the electron acceptor. The PCE of the solar cell based on PC-CARB/P71CBM (1:4) was 1.27{\%} with an open-circuit voltage (Voc) of 0.65 V, and a short-circuit current (Jsc) of 6.69 mA/cm2.",
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Low bandgap carbazole copolymers containing an electron-withdrawing side chain for solar cell applications. / Lee, Jung Feng; Hsu, Lien-Chung; Lee, Po I.; Chuang, Hung Yi; Yang, Ming Lun; Chen, Jen-Sue; Chou, Wei-Yang.

In: Solar Energy Materials and Solar Cells, Vol. 95, No. 10, 01.10.2011, p. 2795-2804.

Research output: Contribution to journalArticle

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AU - Hsu, Lien-Chung

AU - Lee, Po I.

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AU - Chen, Jen-Sue

AU - Chou, Wei-Yang

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