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Title: Field-effect BaTiO{sub 3}-Si solar cells

Conventional solar cells make use of the spatial variation in electronic environment due to junctions for charge separation. We investigated field-effect BaTiO{sub 3}-Si solar cells that utilize the bound surface charges of BaTiO{sub 3} to separate charge carriers in silicon. Rectifying behavior and photovoltaic effect were observed on cells with forward polarization. Theoretical simulation indicated that the induced electric field due to BaTiO{sub 3} polarization could extend into the silicon layer, which is consistent with experimental observations. In addition, adjusting relevant parameters may optimize the electric field distribution. The cells are promising in terms of material selection, device design, and fabrication.
Authors:
; ; ; ; ;  [1] ;  [2]
  1. Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong (China)
  2. Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong (China)
Publication Date:
OSTI Identifier:
22258612
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BARIUM; CHARGE CARRIERS; ELECTRIC CONTACTS; ELECTRIC FIELDS; PHOTOVOLTAIC EFFECT; POLARIZATION; SEMICONDUCTOR JUNCTIONS; SILICON; SOLAR CELLS; TITANATES; TITANIUM OXIDES