Journal
SOLAR ENERGY
Volume 173, Issue -, Pages 120-125Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2018.07.031
Keywords
CBD; CdS; Residue; Thermal evaporation; Thin films
Categories
Funding
- Solar Energy Research Institute of The National University of Malaysia (@UKM) [GUP-2016-042]
- Institute of Sustainable Energy (ISE) of the Universiti Tenaga Nasional (@The National Energy University) of Malaysia
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CdS microcrystal, with sphere like morphology, was synthesised from the residue obtained after the chemical bath deposition (CBD) of CdS thin layers usually deposited for CdTe and/or CIGS thin film solar cells, specifically by recycling the chemical waste. The residue was collected and reused to deposit cadmium sulphide (CdS) thin films on glass substrate by thermal evaporation. The films were subsequently annealed in vacuum at 250 degrees C, 350 degrees C and 420 degrees C for 40 min. The structural and optical properties were characterized by XRD, SEM, and UV-Vis spectrometry. All the films were found to exhibit high transmittance (over 70 to 90%). The optical band gap energy was found to be in the range of 2.28-2.37 eV, which is very suitable to be used as buffer or window for CdTe or CIGS thin film solar cells.
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