Abstract
A solar-blind ultraviolet photodetector based on perovskite (LaAlO3)0.3-(SrAl0.5Ta0.5O3)0.7 (LSAT) single crystal has been fabricated. The Deep Ultra Violet (DUV)/Ultra Violet (UV) (200 versus 290 nm) ratio is more than three orders of magnitude under the applied bias voltage 200 V. Under illumination at 200 nm, the responsivity of this ultraviolet photodetector reaches 4 mA/W at 200 V bias. The corresponding quantum efficiency and detectivity are 2.76% and 1×1011 cm·Hz0.5/W, respectively. The ultrafast response with a rise time of 563 ps and full width half maximum (FWHM) of 1.085 ns is obtained. The high sensitivity, ultrafast response speed, and good signal-to-noise ratio demonstrate that the LSAT photodetector could be a promising candidate as the solar-blind ultraviolet photodetector.
Original language | English |
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Article number | 035302 |
Journal | AIP Advances |
Volume | 7 |
Issue number | 3 |
DOIs | |
State | Published - Mar 1 2017 |
Externally published | Yes |
Funding
This work was supported by the National Hi-tech (R&D) project of China (No. 2014AA032607), the National Basic Research Program of China (Nos. 2014CB921001 and 2013CB328706), the Key Research Program of Frontier Sciences, CAS (No. QYZDJSSW-SLH020), and the National Natural Science Foundation of China (Nos. 11674385, 11404380, 11574365, 11474349, and 11104255), and the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (No. XDB07030200) and Fundamental Research Funds for the Central Universities (Grant Nos. 53200859478 and 53200859128).