Visible-blind, ultraviolet-sensitive photodetector based on SrTiO3 single crystal.
High-sensitivity and visible-blind ultraviolet (UV) photoconductive detectors based on SrTiO(3) single crystal with interdigitated electrodes are reported. The responsivities of photovoltage and photocurrent can reach 2.13x10(5) V/W and 213 mA/W, respectively, at 330 nm at ambient temperature, and the corresponding quantum efficiency eta reaches 80.2%. The dark current is lower than 50 pA at 10 V bias, and the UV/visible contrast ratio is about four orders of magnitude with a sharp cutoff at 390 nm. The experimental results demonstrate that SrTiO(3) single crystal has potentially wide applications in UV detection.
Xing
J
J
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China.
Zhao
K
K
Lu
H B
HB
Wang
X
X
Liu
G Z
GZ
Jin
K J
KJ
He
M
M
Wang
C C
CC
Yang
G Z
GZ