Journal
JOURNAL OF LUMINESCENCE
Volume 262, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2023.119939
Keywords
Lateral growth; ZnO nanowires; Ultraviolet photodetectors
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To create ultraviolet photodetectors with high sensitivity, detection rate, and responsivity, the lateral growth of ZnO nanowires arrays was controlled on a quartz substrate using a hydrothermal method. The combined effects of the ZnO seed layer and high-quality crystalline nanowires greatly improved the performance of the photodetectors.
In order to create ultraviolet photodetectors with a high sensitivity, high detection rate, and high responsivity, the lateral growth of ZnO nanowires arrays was controlled on a quartz substrate by using a hydrothermal method. The combined effects of the ZnO seed layer and the high quality of the crystalline nanowire arrays with different lengths greatly improved the performance of the photodetectors. The photocurrent in the photodetectors prepared with the lateral nanowires was 10(3) times higher than that of the photodetector prepared with a ZnO film due to the photoconductive gain of nanowires. As the nanowire length increased, the responsivity increased and then decreased due to the surface action of nanowires and the influence of interpolation space. The ZnO nanowire photodetector with the optimal length showed significant performance improvements including a higher responsivity, larger detectivity, lower NEP, and extremely enhanced EQE of 14.9 A/W, 2.3 x 10(12) jones, 3.0 x 10(-13) WHz(-1/2) and 5.0 x 10(3)%, respectively. The controlled growth of lateral nanowires for use in high-performance photodetectors provides a feasible way to realize high efficiency light detection in future optoelectronic applications.
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