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Large Area Chemical Bath Deposition of CdS on Cu(InGa)Se2

Published online by Cambridge University Press:  31 January 2011

Nirav D Vora ,
Ingrid Repins ,
Steve Robbins ,
Johnathan Mann ,
Hector Castenada  and
Brian Armstrong
Nirav D Vora
Affiliation:
[email protected], National Renewable Energy Laboratory, 1617 Cole Blvd, Mailstop 3219, Golden, Colorado, 80401, United States, 303-384-7837
Ingrid Repins
Affiliation:
[email protected], National Renewable Energy Laboratory, Golden, Colorado, United States
Steve Robbins
Affiliation:
[email protected], National Renewable Energy Laboratory, Golden, Colorado, United States
Johnathan Mann
Affiliation:
[email protected], National Renewable Energy Laboratory, Golden, Colorado, United States
Hector Castenada
Affiliation:
[email protected], Heateflex Corporation, Arcadia, California, United States
Brian Armstrong
Affiliation:
[email protected], Heateflex Corporation, Arcadia, California, United States
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Abstract

Chemical bath deposition (CBD) is a commonly used method of depositing cadmium sulfide (CdS) films for photovoltaic application. The method is based on decomposition of a sulfur source in an alkaline solution of a cadmium source on the surface of the Cu(In,Ga)Se2 (CIGS) substrate. On the lab scale the CdS film is deposited by submerging a 1” square CIGS substrate in a heated beaker containing the chemical bath. This batch processing method is the one used for record-performing devices. There is an ongoing effort at the National Renewable Energy Laboratory to scale-up the CBD process to deposit CdS films on 6” square substrate. Efforts are focused at designing both batch and flow reactors for depositing uniform, device quality CdS films on larger substrates. Batch reactor designs involve reproducing the deposition process in the beaker on a bigger scale with minimal chemical waste, while flow reactors are designed for continuous processing, such as encountered in roll-to-roll manufacturing lines.

Keywords

photovoltaicsolution depositionthin film
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1165: Symposium M – Thin-Film Compound Semiconductor Photovoltaics–2009 , 2009 , 1165-M05-05
Copyright
Copyright © Materials Research Society 2009

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