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Polythiophene derivative comprising carbazoles as pendant groups for polymer solar cell applications

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Title: Polythiophene derivative comprising carbazoles as pendant groups for polymer solar cell applications
Authors: Wang, Hsing-Ju1, Chan, Li-Hsin2 lhchan@ncnu.edu.tw, Chen, Chih-Ping3, Lee, Rong-Ho1, Su, Wen-Chiung4, Jeng, Ru-Jong1 rjjeng@nchu.edu.tw
Source: Thin Solid Films. May2011, Vol. 519 Issue 15, p5264-5269. 6p.
Subjects: Polythiophenes, Carbazole, Solar cells, Polymers, Electrochemical analysis, Oxidation, Energy conversion, Energy levels (Quantum mechanics)
Abstract: Abstract: We have prepared a polythiophene copolymer (CzPh-PT) containing 9-position substituted carbazoles as bulky pendants and investigated its application in polymer solar cell (PSC). Electrochemical study presented that the onset oxidation potential positively shifted 0.47eV for CzPh-PT in comparison with that of poly(3-hexyl thiophene). By incorporating the bulky substituent of CzPh-PT, the effective conjugation length can be curtailed, and consequently a lowered HOMO energy level (−5.38eV) was acquired. This promises better air stability and a high open circuit voltage (V oc) for the PSC. Moreover, the optical properties of CzPh-PT reveal that the presence of π–π interaction between carbazole units can enhance light harvesting ability in visible region, leading to a wide absorbance. PSC was fabricated based on an interpenetrating network of CzPh-PT as electron-sufficient polymer and [6,6]-phenyl C61 butyric acid methyl ester (PC61BM) as electron-deficient material. The PSC device based on the blend of CzPh-PT/PC61BM (w/w=1:1) gave the best preliminary result with a V oc of 0.85V, a short-circuit current of 1.57mA/cm2, and a fill factor of 0.27, offering an overall power conversion efficiency of 0.36%. Our finding suggests that the polythiophene derivative comprising bulky steric groups as side chains is promising for PSC applications. [Copyright &y& Elsevier]
Copyright of Thin Solid Films is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 60921170
AccessLevel: 6
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PubTypeId: academicJournal
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  Data: Polythiophene derivative comprising carbazoles as pendant groups for polymer solar cell applications
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  Data: <searchLink fieldCode="AR" term="%22Wang%2C+Hsing-Ju%22">Wang, Hsing-Ju</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Chan%2C+Li-Hsin%22">Chan, Li-Hsin</searchLink><relatesTo>2</relatesTo><i> lhchan@ncnu.edu.tw</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Chih-Ping%22">Chen, Chih-Ping</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Lee%2C+Rong-Ho%22">Lee, Rong-Ho</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Su%2C+Wen-Chiung%22">Su, Wen-Chiung</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Jeng%2C+Ru-Jong%22">Jeng, Ru-Jong</searchLink><relatesTo>1</relatesTo><i> rjjeng@nchu.edu.tw</i>
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  Data: <searchLink fieldCode="JN" term="%22Thin+Solid+Films%22">Thin Solid Films</searchLink>. May2011, Vol. 519 Issue 15, p5264-5269. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Polythiophenes%22">Polythiophenes</searchLink><br /><searchLink fieldCode="DE" term="%22Carbazole%22">Carbazole</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+cells%22">Solar cells</searchLink><br /><searchLink fieldCode="DE" term="%22Polymers%22">Polymers</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemical+analysis%22">Electrochemical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation%22">Oxidation</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+conversion%22">Energy conversion</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+levels+%28Quantum+mechanics%29%22">Energy levels (Quantum mechanics)</searchLink>
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  Data: Abstract: We have prepared a polythiophene copolymer (CzPh-PT) containing 9-position substituted carbazoles as bulky pendants and investigated its application in polymer solar cell (PSC). Electrochemical study presented that the onset oxidation potential positively shifted 0.47eV for CzPh-PT in comparison with that of poly(3-hexyl thiophene). By incorporating the bulky substituent of CzPh-PT, the effective conjugation length can be curtailed, and consequently a lowered HOMO energy level (−5.38eV) was acquired. This promises better air stability and a high open circuit voltage (V oc) for the PSC. Moreover, the optical properties of CzPh-PT reveal that the presence of π–π interaction between carbazole units can enhance light harvesting ability in visible region, leading to a wide absorbance. PSC was fabricated based on an interpenetrating network of CzPh-PT as electron-sufficient polymer and [6,6]-phenyl C61 butyric acid methyl ester (PC61BM) as electron-deficient material. The PSC device based on the blend of CzPh-PT/PC61BM (w/w=1:1) gave the best preliminary result with a V oc of 0.85V, a short-circuit current of 1.57mA/cm2, and a fill factor of 0.27, offering an overall power conversion efficiency of 0.36%. Our finding suggests that the polythiophene derivative comprising bulky steric groups as side chains is promising for PSC applications. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Thin Solid Films is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.tsf.2011.01.173
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      – Code: eng
        Text: English
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        PageCount: 6
        StartPage: 5264
    Subjects:
      – SubjectFull: Polythiophenes
        Type: general
      – SubjectFull: Carbazole
        Type: general
      – SubjectFull: Solar cells
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      – SubjectFull: Polymers
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      – SubjectFull: Electrochemical analysis
        Type: general
      – SubjectFull: Oxidation
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      – SubjectFull: Energy conversion
        Type: general
      – SubjectFull: Energy levels (Quantum mechanics)
        Type: general
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      – TitleFull: Polythiophene derivative comprising carbazoles as pendant groups for polymer solar cell applications
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            NameFull: Wang, Hsing-Ju
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            NameFull: Chan, Li-Hsin
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            NameFull: Su, Wen-Chiung
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              M: 05
              Text: May2011
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              Y: 2011
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              Value: 519
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