ECN publication
Title:
Silicon solar cells structured by reactive ion etching and processed with screen printing
 
Author(s):
 
Published by: Publication date:
ECN Solar Energy 1-7-1998
 
ECN report number: Document type:
ECN-RX--98-037 Article (scientific)
 
Number of pages:
4  

Published in: Paper, presented at the 2nd World conference and exhibition on photovoltaic solar energy conversion, Vienna, Austria, 6-10 July (), , , Vol., p.-.

Abstract:
Reactive Ion Etching (RIE) can texture multicrystalline silicon wafersvery well. RIE has the advantage over alkaline etches that it is not sensitive to the crystallographic orientation. RIE has the advantage over acid etches that it can be controlled much better. This work describes multicrystalline silicon solar cells textured by RIE and processed with an industrial process sequence consisting of mainly screen-printing steps. We also made mini-modules of the RIE textured cells. The RIE texturing parameters can be varied to give different textures. Care must be taken that the texture is sufficiently rough to give a low encapsulated reflectance but not so rough that carriers generated by light absorbed in the texture recombine at the surface and cannot be collected at the p-n junction. The screen printing on RIE textured cells was successful. We were able to make cells with both low reflectance and good quantum efficiency. Due to encapsulation problems we were not able to demonstrate an efficiency gain yet. 10 refs.


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