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Sol–gel-derived nanocrystalline aluminum-doped zinc oxide thin films for use as antireflection coatings in silicon solar cells

Published online by Cambridge University Press:  14 October 2013

Amita Verma  and
Narayanasamy Vijayan
Amita Verma*
Affiliation:
Physics of Energy Harvesting Division, National Physical Laboratory, Council of Scientific and Industrial Research, New Delhi 110012, India
Narayanasamy Vijayan
Affiliation:
Physics of Energy Harvesting Division, National Physical Laboratory, Council of Scientific and Industrial Research, New Delhi 110012, India
*
a)Address all correspondence to this author. e-mail: amitaverma75@gmail.com
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Abstract

Sol–gel-derived aluminum (Al)-doped zinc oxide thin films have been deposited on silicon (Si) wafers and microslide glass substrates using the spin coating technique. The atomic ratio of Al:Zn in the films is 0.05, 0.1, 0.2, and 0.3. The films have been characterized using different techniques, i.e., x-ray diffraction, Fourier transform infrared spectroscopy, atomic force microscopy, scanning electron microscopy, UV-visible-near infrared spectrophotometry, spectroscopic ellipsometry, and the four-probe method. The films have exhibited excellent optical transmittance (∼90%). The refractive indices of the films are in the range between 1.47 and 1.53. The thickness of the films is in the range of 103–115 nm. The films have demonstrated reflectivity of about 3% at a wave length of 600 nm. The reflectivity, transmittance, refractive index, and thickness values of the films show that the films are promising candidates for utility as antireflection coatings in silicon solar cells.

Keywords

annealingcrystallinedopantelectrical propertiesnanoscaleoptical propertiessol–gelx-ray diffraction (XRD)
Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 21 , 14 November 2013 , pp. 2990 - 2995
Copyright
Copyright © Materials Research Society 2013 

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