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Quantum-dot-sensitized solar cell with unprecedentedly high photocurrent

Scientific reports, 2013, Vol.3 (1), p.1050-1050, Article 1050 [Peer Reviewed Journal]

Copyright Nature Publishing Group Jan 2013 ;Copyright © 2013, Macmillan Publishers Limited. All rights reserved 2013 Macmillan Publishers Limited. All rights reserved ;ISSN: 2045-2322 ;EISSN: 2045-2322 ;DOI: 10.1038/srep01050 ;PMID: 23308343

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  • Title:
    Quantum-dot-sensitized solar cell with unprecedentedly high photocurrent
  • Author: Lee, Jin-Wook ; Son, Dae-Yong ; Ahn, Tae Kyu ; Shin, Hee-Won ; Kim, In Young ; Hwang, Seong-Ju ; Ko, Min Jae ; Sul, Soohwan ; Han, Hyouksoo ; Park, Nam-Gyu
  • Subjects: Illumination ; Injection ; Photovoltaic cells ; Quantum dots ; Recombination
  • Is Part Of: Scientific reports, 2013, Vol.3 (1), p.1050-1050, Article 1050
  • Description: The reported photocurrent density (J(SC)) of PbS quantum dot (QD)-sensitized solar cell was less than 19 mA/cm(2) despite the capability to generate 38 mA/cm(2), which results from inefficient electron injection and fast charge recombination. Here, we report on a PbS:Hg QD-sensitized solar cell with an unprecedentedly high J(SC) of 30 mA/cm(2). By Hg(2+) doping into PbS, J(SC) is almost doubled with improved stability. Femtosecond transient study confirms that the improved J(SC) is due to enhanced electron injection and suppressed charge recombination. EXAFS reveals that Pb-S bond is reinforced and structural disorder is reduced by interstitially incorporated Hg(2+), which is responsible for the enhanced electron injection, suppressed recombination and stability. Thanks to the extremely high J(SC), power conversion efficiency of 5.6% is demonstrated at one sun illumination.
  • Publisher: England: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 2045-2322
    EISSN: 2045-2322
    DOI: 10.1038/srep01050
    PMID: 23308343
  • Source: PubMed Central
    ProQuest Central
    DOAJ Directory of Open Access Journals
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