Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

High-performance visible blind ultraviolet photodetector based on KTaO3 single crystal

Not Accessible

Your library or personal account may give you access

Abstract

We report a visible-blind ultraviolet photoconductive detector with interdigitated electrodes based on KTaO3 (KTO) single crystals. Both the steady spectral responses and the transient photovoltaic measurements clearly exhibit a cutoff wavelength at 344 nm (3.6eV), in accordance with the bandgap of KTO. The KTO photodetectors show a low dark current 1.5pA at 20 V, and a high UV-to-visible rejection ratio with 3 orders of magnitude at room temperature. The quantum efficiency is 37.49% under 20 V bias, and the detectivity D* of 3.85×1012cm·Hz0.5/W, which is comparable to that of silicon photodetectors in the UV region. The rise time of photoelectric response is 260ps, indicating an ultrafast photoelectric response characteristic. The present work offers appealing prospects for the application of KTO materials in high-performance visible blind ultraviolet photodetectors.

© 2016 Optical Society of America

Full Article  |  PDF Article
More Like This
Low-noise visible-blind photodetectors based on SrTiO3 single crystal with transparent indium tin oxide electrode as window

Er-Jia Guo, Hui-Bin Lu, Meng He, Jie Xing, Kui-Juan Jin, and Guo-Zhen Yang
Appl. Opt. 49(14) 2557-2560 (2010)

Visible blind ultraviolet photodetector based on CH3NH3PbCl3 thin film

Wenzhen Wang, Haitao Xu, Jiang Cai, Jiabin Zhu, Chaowei Ni, Feng Hong, Zebo Fang, Fuzong Xu, Siwei Cui, Run Xu, Linjun Wang, Fei Xu, and Jian Huang
Opt. Express 24(8) 8411-8419 (2016)

Visible-blind, ultraviolet-sensitive photodetector based on SrTiO3 single crystal

J. Xing, K. Zhao, H. B. Lu, X. Wang, G. Z. Liu, K. J. Jin, M. He, C. C. Wang, and G. Z. Yang
Opt. Lett. 32(17) 2526-2528 (2007)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved