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New UV‐A Photodetector Based on Individual Potassium Niobate Nanowires with High Performance
Author(s) -
Liu Hui,
Zhang Zhiming,
Hu Linfeng,
Gao Nan,
Sang Liwen,
Liao Meiyong,
Ma Renzhi,
Xu Fangfang,
Fang Xiaosheng
Publication year - 2014
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201400176
Subject(s) - materials science , photodetector , nanowire , potassium niobate , optoelectronics , potassium , nanotechnology , ferroelectricity , dielectric , metallurgy
A new UV‐A photodetector based on K 2 Nb 8 O 21 nanowire is successfully fabricated for the first time. The potassium niobate is synthesized using a facile molten method. The K 2 Nb 8 O 21 nanowire photodetectors exhibit an excellent sensitivity and wavelength selectivity with respect to UV‐A light. Furthermore, the photodetectors show great advantages in response time compared with other sensors based on single‐oxide semiconductor nanostructures, and, especially, the responsivity is much better than that of single ZnS nanobelt photodetectors. The mechanism of conductivity is explained from the viewpoints of field emission and thermionic field emission for the change of light intensities.