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Low-temperature Wet Chemical Deposition of Ultra-thin ZnS/ZnO Bilayers on Plastic Substrates for Applications of Photovoltaic Devices

Published online by Cambridge University Press:  01 February 2011

Rong-Fuh Louh ,
William Wu ,
Jean Liu  and
Irene Tsai
Rong-Fuh Louh
Affiliation:
[email protected], Feng Chia University, Materials science and Engineering, Taichung, Taiwan, Province of China
William Wu
Affiliation:
[email protected], Feng Chia University, Materials science and Engineering, Taichung, Taiwan, Province of China
Jean Liu
Affiliation:
[email protected], Feng Chia University, Materials science and Engineering, Taichung, Taiwan, Province of China
Irene Tsai
Affiliation:
[email protected], Feng Chia University, Materials science and Engineering, Taichung, Taiwan, Province of China
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Abstract

The ultra-thin II-VI semiconductor ZnS/ZnO bilayers (< 50 nm thickness for each layer) can be easily formed on the plastic substrates at 70˜80°C for 20 min. By low temperature wet chemical synthesis techniques, namely chemical bath deposition (CBD) and successive ionic layer adsorption and reaction (SILAR). The specific microstructure of such ZnS/ZnO bilayers including film thickness, particle size and morphology, is also modified and obtained in accordance with processing parameters. Along with thin film quality and morphology, the transmittance and reflectance of ZnS/ZnO layers can be measured by field emission SEM and UV-Vis spectroscopy. Besides the bilayer of ZnS (˜35 nm thick)/ZnO (˜50 nm thick) film with uniform thickness was successfully deposited on the optical grade PET substrates, a well-distributed layer of ZnO nanoparticles with ˜100 nm size on the top of ZnS (35 nm thick) film was also attempted. The average transmittance of these bilayer samples can reach greater 85%. Our future goal is to employ such ZnS/ZnO bilayer structure on potential organic substrates to be associated with flexible photovoltaic devices to meet desired cost-effectiveness requirements.

Keywords

photovoltaicchemical synthesisII-VI
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1260: Symposium T – Photovoltaics and Optoelectronics from Nanoparticles , 2010 , 1260-T05-08
Copyright
Copyright © Materials Research Society 2010

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