Development of combinatorial pulsed laser deposition for expedited device optimization in CdTe/CdS thin-film solar cells


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Authors
Kadhim, A 
Harrison, P 
Meeth, J 
Al-Mebir, A 
Zeng, G 
Abstract

jats:pA combinatorial pulsed laser deposition system was developed by integrating a computer controlled scanning sample stage in order to rapidly screen processing conditions relevant to CdTe/CdS thin-film solar cells. Using this system, the thickness of the CdTe absorber layer is varied across a single sample from 1.5 jats:italicμ</jats:italic>m to 0.75 jats:italicμ</jats:italic>m. The effects of thickness on CdTe grain morphology, crystal orientation, and cell efficiency were investigated with respect to different postprocessing conditions. It is shown that the thinner CdTe layer of 0.75 jats:italicμ</jats:italic>m obtained the best power conversion efficiency up to 5.3%. The results of this work shows the importance that CdTe grain size/morphology relative to CdTe thickness has on device performance and quantitatively exhibits what those values should be to obtain efficient thin-film CdTe/CdS solar cells fabricated with pulsed laser deposition. Further development of this combinatorial approach could enable high-throughput exploration and optimization of CdTe/CdS solar cells.</jats:p>

Description
Keywords
40 Engineering, 4016 Materials Engineering, 34 Chemical Sciences
Journal Title
International Journal of Optics
Conference Name
Journal ISSN
1687-9384
1687-9392
Volume Title
Publisher
Hindawi Limited