The Stand for Research of Positional-Sensitive Photosensor
https://doi.org/10.32362/2500-316X-2019-7-3-69-76
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Abstract
The paper considers position-sensitive photodetectors (PSP), which are designed to detect the source of electromagnetic radiation in the optical range and determine the coordinates of the irradiated area in real time, as well as to track moving optical objects. In particular, data are presented on photodetectors based on photosensitive epitaxial CdSe/mica layers with an unconventional layout and switching of electrical contacts. The output signal of such PSP is the transverse potential difference that appears between its two contacts after exposure of one of the areas of the photodetector. These PSPs can be an alternative or competition to existing photocells due to high accuracy, speed, ease of manufacture and low cost. But there are significant obstacles for their wide application. First, it is an analog type of output signal, which prevents its further processing. And, second, it is difficult to calibrate “manually” a newly made photosensor: it takes a long time associated with the accumulation and processing of large amounts of data. The introduction of computer technology and the creation of an information-measuring system allow us to process the output signals of such photodetectors with high accuracy and speed in real time. To solve this problem we have developed a stand for the study of position-sensitive photodetectors, which is presented in this paper. This stand allows digitizing the signal received from the photodetector, in real time, with high accuracy to determine the coordinates of the irradiated area on the photodetector and explore its characteristics such as the specified value of the dark current of the photodetector, light current at a certain illumination, and output voltage. At this stand, position-sensitive photodetectors based on the CdS/mica system were studied. It is shown that the characteristics and parameters of photoreceivers measured on this stand coincide with theoretical ones, within the error limits. Recommendations on the use of the stand
are given.
About the Authors
V. I. ChukitaRussian Federation
Senior Lecturer of the Chair of Solid-State Electronics and Microelectronics
128, 25th of October st., Tiraspol MD-3300, PMR
E. A. Senokosov
Russian Federation
D.Sc. (Phys. and Mathem.), Professor, Head of the Chair of Solid-State Electronics and Microelectronics
128, 25th of October st., Tiraspol MD-3300, PMR
V. S. Feshchenko
Russian Federation
D.Sc. (Engineering), Associate Professor, Head of the Research and Production Laboratory № 1
4, Ivan Franko st., Moscow 121108, Russia
References
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Supplementary files
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1. Fig.2. Experimental dependence of voltage UBD = f(r00) at Iinput = 3.0 µA and θ = π/4 (curve 1) and theoretical dependence of voltage UBD = f(r00) at Iinput = 3.0, 2.0, 1.0 µA and θ = π/4 (curves 2, 3, 4, respectively). | |
Subject | ||
Type | Research Instrument | |
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(67KB)
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Indexing metadata ▾ |
Title | Fig.2. Experimental dependence of voltage UBD = f(r00) at Iinput = 3.0 µA and θ = π/4 (curve 1) and theoretical dependence of voltage UBD = f(r00) at Iinput = 3.0, 2.0, 1.0 µA and θ = π/4 (curves 2, 3, 4, respectively). | |
Type | Research Instrument | |
Date | 2019-06-10 |
Review
For citations:
Chukita V.I., Senokosov E.A., Feshchenko V.S. The Stand for Research of Positional-Sensitive Photosensor. Russian Technological Journal. 2019;7(3):69-76. (In Russ.) https://doi.org/10.32362/2500-316X-2019-7-3-69-76
ISSN 2500-316X (Online)