Sharma, Alka and Kaur, Mandeep and Bhattacharyya, Biplab and Karuppiah, Stalin and Singh, Surinder P. and Senguttuvan, T. D. and Husale, Sudhir (2015) Channel length specific broadspectral photosensitivity of robust chemically grown CdS photodetector. AIP Advances, 5 (4). ISSN 2158-3226

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CdS grown by chemical bath deposition (CBD) technique is very simple, robust, economical method and has potential large scale applications in solar cells, photovoltaic, photodetectors, sensors and optoelectronic devices. Here we report channel lengths (CLs) specific broadspectral photoresponse properties of commonly grown robust CdS films by CBD. The broadspectral dependent current flow has been observed in all CLs and the rise and decay times have been measured in milliseconds for visible wavelengths (400-700nm). The rise time curves showed linear dependency when measured for CLs 300, 500 and 700nm and non-linearity was observed for CLs 7 mu m, 45 mu m and 350 mu m. We have noticed that decrease in channel lengths down to nanometers (300 nm) increases the response time. Three steps decay time has been noticed for all CLs. The shorter channels (nm) showed two trends in decay time, small increase for wavelengths < 550nm and significant increase for wavelengths > 550nm. Finally, CLs specific broadspectral photosensitivity has been investigated which indicates the device geometry and fabrication method play an important role for defining the CdS based photodetectors or simulating the characteristics of a photodetector. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.

Item Type: Article
Subjects: Materials Science
Applied Physics/Condensed Matter
Nanoscience/ Nanotechnology
Depositing User: Dr. Rajpal Walke
Date Deposited: 19 Sep 2016 07:25
Last Modified: 19 Sep 2016 07:25

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