Photo-induced electron transfer from a conducting polymer to buckminsterfullerene: A molecular approach to high efficiency photovoltaic cells. Final report

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For photovoltaic cells made with pure conjugated polymers, energy conversion efficiencies were typically 10{sup {minus}3}--10{sup {minus}2}%, too low to be used in practical applications. The recent discovery of photoinduced electron transfer in composites of conducting polymers (as donors) and buckminsterfullerene, C{sub 60}, and its derivatives (as acceptors) provided a molecular approach to high efficiency photovoltaic conversion. Since the time scale for photoinduced charge transfer is subpicosecond, more than 10{sup 3} times faster than the radiative or nonradiative decay of photo-excitations, the quantum efficiency for charge transfer and charge separation from donor to acceptor is close to unity. Thus, photoinduced charge ... continued below

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4 p.

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Heeger, A.J. August 13, 1998.

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Description

For photovoltaic cells made with pure conjugated polymers, energy conversion efficiencies were typically 10{sup {minus}3}--10{sup {minus}2}%, too low to be used in practical applications. The recent discovery of photoinduced electron transfer in composites of conducting polymers (as donors) and buckminsterfullerene, C{sub 60}, and its derivatives (as acceptors) provided a molecular approach to high efficiency photovoltaic conversion. Since the time scale for photoinduced charge transfer is subpicosecond, more than 10{sup 3} times faster than the radiative or nonradiative decay of photo-excitations, the quantum efficiency for charge transfer and charge separation from donor to acceptor is close to unity. Thus, photoinduced charge transfer across a donor/acceptor (D/A) interface provides an effective method of overcome early time carrier recombination in organic systems and thus to enhance the optoelectronic response of these materials. Progress toward creating bulk D/A heterojunction materials is described by summarizing two publications which resulted from this research, namely: Plastic photovoltaic cells made with donor-acceptor composites -- Enhanced carrier collection efficiency via a network of internal heterojunctions; and Charge separation and photovoltaic conversion in polymer composites with internal donor/acceptor heterojunctions.

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4 p.

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OSTI as DE98006360

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  • Other Information: PBD: 13 Aug 1998

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  • Other: DE98006360
  • Report No.: DOE/ER/12138--T1
  • Grant Number: FG03-93ER12138
  • DOI: 10.2172/656624 | External Link
  • Office of Scientific & Technical Information Report Number: 656624
  • Archival Resource Key: ark:/67531/metadc712494

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Office of Scientific & Technical Information Technical Reports

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  • August 13, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 6, 2015, 4:17 p.m.

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Heeger, A.J. Photo-induced electron transfer from a conducting polymer to buckminsterfullerene: A molecular approach to high efficiency photovoltaic cells. Final report, report, August 13, 1998; United States. (digital.library.unt.edu/ark:/67531/metadc712494/: accessed November 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.