• DocumentCode
    121450
  • Title

    Improvement of the open-circuit voltage of Cu2ZnSnS4 cells using a two-layered process

  • Author

    Tajima, Shinya ; Itoh, Takayuki ; Hazama, Hirofumi ; Ohishi, Kiyoshi ; Asahi, Ryoji

  • Author_Institution
    Toyota Central R&D Labs., Inc., Nagakute, Japan
  • fYear
    2014
  • fDate
    8-13 June 2014
  • Abstract
    In Cu2ZnSnS4 (CZTS) photovoltaic cells, a low open-circuit voltage (VOC) principally causes the low conversion efficiency. We investigated the deposition of a CZTS layer using two-layered process to improve the VOC of the CZTS cells. In this process, the first CZTS layers near Mo electrode was composed of high Cu content and the second layer near surface was composed of low Cu content. The two-layered process improved the Voc of the CZTS cells, and the value increased from 0.66 to 0.78 V. Finally, the best CZTS cell showed a conversion efficiency of 8.8%.
  • Keywords
    copper compounds; electrochemical electrodes; solar cells; tin compounds; zinc compounds; CZTS photovoltaic cells; Cu2ZnSnS4; efficiency 8.8 percent; low conversion efficiency; low open-circuit voltage; molybdenum electrode; second layer near surface; solar cells; two-layered process; Indexes; RNA; Read only memory; Tin; CZTS; carrier concentration; chalcogenide; composition gradient; open-circuit voltage;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Photovoltaic Specialist Conference (PVSC), 2014 IEEE 40th
  • Conference_Location
    Denver, CO
  • Type

    conf

  • DOI
    10.1109/PVSC.2014.6924951
  • Filename
    6924951
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=121450