NDLI: The ZnO-reflectance effect on the heterojunction ITO/ZnO/CdS/CdTe

Content Provider	IEEE Xplore Digital Library
Author	Pena, J.L. Rejon, V. Ares, O. Camacho, J.M. Rios-Flores, A.
Copyright Year	2012
Description	Author affiliation: Applied Physics Department, CINVESTAV-IPN, Mérida, Yucatán, 97310, México (Pena, J.L.; Rejon, V.; Ares, O.; Camacho, J.M.; Rios-Flores, A.)
Abstract	The reported structure in this work was fabricated using layers ITO/ZnO/CdS/CdTe grown onto borosilicate commercial glass. The thin films of ITO and CdS were deposited using rf-sputtering in argon atmosphere from ITO and CdS targets. The ZnO layer also was deposited by rf-sputtering from metallic Zn target. All targets were of 5N of purity. The CdTe film was about 8 µm of thickness, was deposited onto CdS using a conventional closed space sublimation technique. By using basic calculus for optical antireflective coatings, was demonstrated that film ZnO has the nearest refraction index as needing for optical matching for ITO and CdS layers. The reflectance of the structure glass/ITO/ZnO/CdS/CdTe when the ZnO thickness is varied from 100–400 nm it is reported. In this work also the reflectance of the intermediate structures such as glass/ITO, glass/ITO/ZnO and glass/ITO/ZnO/CdS are reported. We found a minimum reflectance of 9% of the complete structure between 500–850 nm of wavelength. By taking the optimal thickness, a solar cell was fabricated, was activated by using CHClF gas mixed with Ar at 400 °C for 5 minutes. As a back contact 15 nm of Cu and 500 nm of Mo were deposited by rf-sputtering in Ar atmosphere. The efficiency was about 10.1% for a cell of 1.01 cm2. After two months, the solar cell preserves its characteristics.
Starting Page	002021
Ending Page	002023
File Size	1308102
Page Count	3
File Format	PDF
ISBN	9781467300643
ISSN	01608371
e-ISBN	9781467300667
DOI	10.1109/PVSC.2012.6317995
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Zinc oxide Photovoltaic cells Reflectivity Indium tin oxide Glass Optical films refractive index antireflection coating photovoltaic cells ZnO CdS CdTe
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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