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Development of fast and sensitive ultraviolet photodetector using p‐type Ni O /n‐type Ti O 2 heterostructures
Author(s) -
Khun K.,
Ibupoto Z. H.,
Willander M.
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.201330149
Subject(s) - photocurrent , materials science , photodetector , tin oxide , optoelectronics , nanorod , ultraviolet , rutile , heterojunction , non blocking i/o , photodiode , dark current , substrate (aquarium) , homojunction , biasing , nanotechnology , doping , chemical engineering , voltage , chemistry , biochemistry , oceanography , physics , quantum mechanics , geology , engineering , catalysis
The fast and sensitive ultraviolet (UV) photodetector are of high demand due to their potential applications in several fields. Therefore, the present study describes the synthesis of well aligned TiO 2 nanorods, NiO nanostructures and their composite hetero‐structures on the fluorine doped tin oxide (FTO) glass substrate by hydrothermal method. The material characterization was performed by scanning electron microscopy and X‐ray diffraction. The synthesized nanostructures are well aligned, dense, and uniform on the substrate. TiO 2 nanostructures are tetragonal in shape with rutile phase. The current–voltage ( I – V ) characteristics were measured at room temperature. The photodiode exhibits nonlinear and rectifying behavior with high sensitivity and fast UV detection response. The enhanced photocurrent and less dark current are the attractive features of the fabricated photodiode. The observed UV response for the photodetector describes its worth and potential application in the respective fields.