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Enhanced photovoltaic effect of polycrystalline BiFeO 3 film
Author(s) -
Liu Baoting,
Peng Zengwei,
Ma Jikui,
Wang Jinfeng,
Zhao Qingxun,
Wang Yinglong
Publication year - 2013
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201228789
Subject(s) - photocurrent , materials science , photovoltaic effect , crystallite , irradiation , optoelectronics , sputter deposition , substrate (aquarium) , current density , biasing , dark current , short circuit , open circuit voltage , voltage , sputtering , optics , thin film , photovoltaic system , nanotechnology , photodetector , electrical engineering , physics , oceanography , quantum mechanics , geology , nuclear physics , metallurgy , engineering
Polycrystalline BiFeO 3 (BFO) film has been fabricated on Pt(111)/Ti/SiO 2 /Si(001) substrate by a magnetron sputtering method. Both red light of 632.8 nm and purple light of 404 nm have been used to irradiate the sample. It is found that illumination of the sample by the two kinds of lights can induce an increase of the leakage‐current density. The increase of current density by purple light is about two orders of magnitude larger than that without irradiation, while an increase of an order of magnitude is produced by red light. Moreover, an enhanced photovoltaic effect has been observed when the sample is illuminated by purple light. The photocurrent at zero bias increases from 0.08 µA cm −2 in the dark to 3.2 µA cm −2 in purple light. The open‐circuit voltage is 0.28 V.