Solar-blind deep-ultraviolet photodetectors based on an LaAlO(3) single crystal.
Solar-blind deep-ultraviolet (DUV) photoconductive detectors based on an LaAlO(3) (LAO) single crystal with interdigitated electrodes are reported. The LAO detectors show a high sensitivity to DUV light with wavelengths less than 210 nm, and the DUV/UV (200 versus 290 nm) contrast ratio is more than 2 orders of magnitude. The photocurrent responsivity of LAO detector reaches 71.8 mA/W at 200 nm at 10 V bias, and the corresponding quantum efficiency eta is 44.6%. The noise current under sunlight at midday outdoors is only 77 pA. The experimental results indicate that the LAO detectors have attractive potential applications in DUV detection.
Xing
Jie
J
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
Guo
Erjia
E
Jin
Kui-Juan
KJ
Lu
Huibin
H
Wen
Juan
J
Yang
Guozhen
G
D017607:Aluminum Compounds / Q000737:chemistry*; D004566:Electrodes; D007811:Lanthanum / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010777:Photochemistry / Q000379:methods*; D012680:Sensitivity and Specificity; D014466:Ultraviolet Rays
D017607:Aluminum Compounds; D010087:Oxides; D007811:Lanthanum