NDLI: Reaction between sodium and selenium in Bridgman-grown CuInSe

Content Provider	IEEE Xplore Digital Library
Author	Myers, H.F. Champness, C.H. Ishiang Shih
Copyright Year	2012
Description	Author affiliation: McGill University, Montréal, Québec, H3A 1A7, Canada (Myers, H.F.; Champness, C.H.; Ishiang Shih)
Abstract	In the fabrication of CIGS-based solar cells, the incorporation of sodium to increase performance is now standard practice. Because grain boundaries may play a role in the Na action, in this laboratory, studies have been made of the effects of introducing Na into a melt of composition CuInSe to obtain Bridgman-grown monocrystals. It was found that if the added Na exceeds a critical value, [Na], the resulting material changes from p- to n-type. The quantity [Na] is almost proportional to x, the excess of Se over stoichiometry according to the formula [Na]= (2x+δ)/(1+2x+δ). This can be explained by the strong affinity of Na for Se to form NaSe-like compounds, starving the ternary of Se to produce a Se-deficient and therefore n-type chalcopyrite. This conclusion is based on measurements of transport properties, along with XRD, SEM/EDX measurements. On the monocrystal surfaces, CuIn was detected by XPS.
Starting Page	000181
Ending Page	000184
File Size	1049584
Page Count	4
File Format	PDF
ISBN	9781467300643
ISSN	01608371
e-ISBN	9781467300667
DOI	10.1109/PVSC.2012.6317596
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Compounds X-ray scattering Surface treatment Temperature measurement Films Crystals Bridgman-growth CuInSe2 sodium selenium monocrystalline
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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