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Material Related Prerequisites for Chalcopyrite Based Thin Film Solar Cells

Published online by Cambridge University Press:  01 February 2011

Hans-Werner Schock
Hans-Werner Schock*
Affiliation:
University of Stuttgart, Institute of Physical Electronics, Pfaffenwaldring 47, D-70569 Stuttgart, Germany
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Abstract

This contribution reviews the present state of understanding of material properties of chalcopyrite based thin films in respect of application in solar cells. Specific properties of the surface and grain boundaries as well as the back contact have direct consequences for device operation. Surface reconstruction results in Cu depletion of the surface and provokes formation of an intrinsically graded structure. New information about the depth of Cu depleted surface layer is derived from grazing incidence x-ray diffraction. The origin of the charge necessary for an inversion of the surface is still open. In this context, we summarize and evaluate controversial discussions about extrinsic doping by diffusion of donors from partial electrolytes or from the buffer layer. Further open questions are the origin for low recombination velocity at grain boundaries and favorable properties of the back contact and its relation to the interface with back contact materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 763: Symposium B – Compound Semiconductor Photovoltaics , 2003 , B1.6
Copyright
Copyright © Materials Research Society 2003

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