Citation

Islam, M. A. and Rahman, K. S. and Sobayel, K. and Enam, T. and Ali, A. M. and Zaman, Mukter and Akhtaruzzaman, M. and Amin, N. (2017) Fabrication of high efficiency sputtered CdS:O/CdTe thin film solar cells from window/absorber layer growth optimization in magnetron sputtering. Solar Energy Materials and Solar Cells, 172. pp. 384-393. ISSN 0927-0248

Text 1-s2.0-S0927024817304592-main.pdf Restricted to Repository staff only Download (1MB)

Abstract

In this study, CdTe (up to 2.0 µm thick) and oxygenated CdS (CdS:O, up to 100 nm thick) films were deposited by magnetron sputtering and optimum conditions of film growth were investigated for CdS:O/CdTe solar cells. Favourable TeO2 has been confirmed in XRD after the CdCl2 heat treatment of the CdTe films. Moreover, improved structural, optical and electrical properties are observed in the CdCl2 heat treated films. A detailed quantitative study has also been executed using XPS that finds sulfide, sulfate and an intermediate oxide as a function of oxygen content. In many cases, CdS contribution remains predominant, however, the CdSOx contribution increases with the increase of oxygen's partial pressure and decrease of growth rate. The complete solar cell device was fabricated of various CdTe thin films with different growth rates in sputtering. A highly resistive transparent (HRT) buffer layer ZnO:Sn was placed in between the FTO and CdS:O to avoid the forward leakage problem and screen printed C:Cu/Ag is used as the back contact for low cost fabrication. The J-V characteristics and external quantum efficiency (EQE) were measured for the solar cells under the illumination of AM 1.5G and the highest efficiency of 10.3% was achieved for the optimized CdTe growth rate of 5.4 Å/s, while CdS:O growth rate was 0.25 Å/s.

Item Type:	Article
Uncontrolled Keywords:	Thin film solar cell, CdTe, Sputtering, CdS:O thin films, XPS, PL, Conversion efficiency
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Divisions:	Faculty of Engineering (FOE)
Depositing User:	Ms Suzilawati Abu Samah
Date Deposited:	29 Jul 2020 03:04
Last Modified:	29 Jul 2020 03:04
URII:	http://shdl.mmu.edu.my/id/eprint/6989

Downloads

Edit (login required)