Composition-tuned PbSxSe1−x Schottky-barrier infrared detectors
- 1 November 1977
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 31 (9) , 620-622
- https://doi.org/10.1063/1.89773
Abstract
Schottky‐barrier photodiodes were prepared by depositing either lead or indium onto p‐type PbSxSe1−x epitaxial films. These photodiodes had 77 °K zero‐bias resistance‐area products of 26–21 000 Ω cm2 as x varied from 0 to 1, respectively. The peak detectivities were close to the background limit and could be composition tuned between 3.7 and 6.9 μm at 77 °K. Narrowband detectors were prepared by using one film as a short‐wavelength cutoff filter and a second film, of slightly different composition, as the detector. These devices exhibit high quantum efficiencies, low half‐bandwidths, and insensitivity to variations in incident angle.Keywords
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