Towards ultra-thin CdTe solar cells using MOCVD

Jones, E. W., Barrioz, Vincent, Irvine, Stuart and Lamb, Daniel (2009) Towards ultra-thin CdTe solar cells using MOCVD. Thin Solid Films, 517 (7). pp. 2226-2230. ISSN 0040 6090

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Official URL: http://dx.doi.org/10.1016/j.tsf.2008.10.093

Abstract

A study was made on very thin CdTe absorber < 1 µm layers to investigate limitations in CdTe collection efficiency. Metal organic chemical vapour deposition (MOCVD) was used to deposit cadmium sulfide (CdS), cadmium zinc sulfide (Cd0.9Zn0.1S) and cadmium telluride (CdTe). Improvements in photon collection in the blue, where the absorption length is shorter, have been achieved using a wider band gap Cd0.9Zn0.1S ternary alloy to replace CdS as the window layer. Solar cell capacitance simulator (SCAPS) modelling software [M. Burgelman, P. Nollet, S. Degrave, Thin Solid Films, 361–362 (2000) 527–532] has been used to calculate device parameters as a function of the absorber layer thickness (controlled by in situ using laser reflectometry). One feature of the MOCVD grown devices is the apparent absence of pin-holes, demonstrated by growth of an ultra-thin absorber (200 nm) with conversion efficiency of nearly 4%.

Item Type: Article
Uncontrolled Keywords: Metalorganic chemical vapour deposition Cadmium compounds; Semiconducting II–VI materials; Solar cells; Ultra-thin absorbers; Cadmium zinc sulfide
Subjects: F200 Materials Science
Department: Faculties > Engineering and Environment > Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 23 Nov 2015 16:15
Last Modified: 01 Mar 2016 15:56
URI: http://nrl.northumbria.ac.uk/id/eprint/24705

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