NDLI: Enhanced optical absorption and photoresponse of glancing angle deposited CIGS nanorods

Content Provider	IEEE Xplore Digital Library
Author	Brozak, M. Cansizoglu, H. Karabacak, T.
Copyright Year	2015
Description	Author affiliation: Dept. of Phys. & Astron., Univ. of Arkansas at Little Rock, Little Rock, AR, USA (Brozak, M.; Cansizoglu, H.; Karabacak, T.)
Abstract	Nanostructured materials have become an attractive alternative to their thin film and bulk counterparts in photovoltaic and photoconductivity research. This is mainly attributed to their superior optical and electrical properties. Light trapping in vertically aligned nanostructures results in high optical absorption and provides lower dark current and enhanced carrier lifetime by utilizing an anode and cathode via a metal capping process that isolates each nanorod. The combination of these two features can potentially lead to the development of high efficiency nanostructured devices including solar cells, photodiodes, and photodetectors. Results from optical absorption and responsivity properties of nanorod arrays of $CuInGaSe_{2}$ (CIGS), a p-type semiconductor with a wide band gap ranging from 1.0 eV to 1.7 eV, are compared to their thin film counterpart. Utilizing an RF sputtering system, glancing angle deposition (GLAD) technique was used to grow CIGS nanorods while conventional films were fabricated by normal incidence deposition. Scanning electron microscopy (SEM) images indicated a successful growth of CIGS nanorods. Optical reflection was found to be strongly altered by the presence of the nanorod structures through spectroscopic reflectometry and photoresponse was greatly enhanced with an enhancement factor of 7X in fabricated devices.
Starting Page	1
Ending Page	5
File Size	655568
Page Count	5
File Format	PDF
e-ISBN	9781479979448
DOI	10.1109/PVSC.2015.7356121
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-06-14
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical films Optical scattering Integrated optics Optical device fabrication Optical imaging Optical reflection semiconducting nanorods Glancing angle deposition (GLAD) isolated anode/cathode structure light trapping nanowire/nanorod arrays optical absorption optical properties
Content Type	Text
Resource Type	Article

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