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Title: Enhanced open voltage of BiFeO{sub 3} polycrystalline film by surface modification of organolead halide perovskite

Inorganic-organolead halide perovskite CH{sub 3}NH{sub 3}PbI{sub 3} modified BiFeO{sub 3} polycrystalline film has been established. The composite photoelectrode presents much larger open voltage and several magnitudes superior photoelectric conversion performance in comparison to the ordinary BiFeO{sub 3} polycrystalline film. The I-V curve shows that the short-circuit current (J{sub sc}) is 1.74 mA·cm{sup −2} and open-circuit voltage (V{sub oc}) is 1.62 V, the device's photon to current efficiency is over 1%. The large open voltage and high photovoltaic efficiency is believed to attributed to the spontaneous polarization of composite perovskite induced by BiFeO{sub 3} lattice and modified reduced work function of the modified BiFeO{sub 3} surface. Our results clearly show that the present BiFeO{sub 3}-CH{sub 3}NH{sub 3}PbI{sub 3} planar device is capable to generate a large voltage in macro scale under visible light, leading an approach to further applications on photodetectors and optoelectronic switch.
Authors:
 [1] ;  [2] ; ; ;  [1] ;  [1] ;  [2]
  1. Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22303968
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BISMUTH COMPOUNDS; CONVERSION; CURRENTS; ELECTRIC CONDUCTIVITY; ELECTRIC POTENTIAL; FERRITES; FILMS; HALIDES; MODIFICATIONS; PEROVSKITE; PHOTODETECTORS; PHOTONS; PHOTOVOLTAIC EFFECT; POLARIZATION; POLYCRYSTALS; SURFACES; SWITCHES; VISIBLE RADIATION; WORK FUNCTIONS