Künecke U, Schuster M, Wellmann P (2021)
Publication Language: English
Publication Type: Journal article, Original article
Publication year: 2021
Book Volume: 14
Article Number: 2861
Journal Issue: 11
URI: https://www.mdpi.com/1996-1944/14/11/2861
DOI: 10.3390/ma14112861
Open Access Link: https://www.mdpi.com/1996-1944/14/11/2861
The efficiency of Cu(In,Ga)(S,Se)2 (CIGSSe) solar cell absorbers can be increased by the
optimization of the Ga/In and S/Se gradients throughout the absorber. Analyzing such gradients is
therefore an important method in tracking the effectiveness of process variations. To measure compositional
gradients in CIGSSe, energy dispersive X-ray analysis (EDX) with different acceleration
energies performed at both the front surface and the backside of delaminated absorbers was used.
This procedure allows for the determination of compositional gradients at locations that are millimeters
apart and distributed over the entire sample. The method is therefore representative for a large
area and yields information about the lateral homogeneity in the millimeter range. The procedure is
helpful if methods such as secondary ion-mass (SIMS), time-of-flight SIMS, or glow-discharge optical
emission spectrometry (GDOES) are not available. Results of such EDX measurements are compared
with GDOES, and they show good agreement. The procedure can also be used in a targeted manner
to detect local changes of the gradients in inhomogeneities or points of interest in the m range. As
an example, a comparison between the compositional gradients in the regular absorber and above
the laser cut separating the Mo back contact is shown.
APA:
Künecke, U., Schuster, M., & Wellmann, P. (2021). Analysis of compositional gradients in Cu(In,Ga)(S,Se)2 solar cell absorbers using energy dispersive x-ray analysis with different acceleration energies. Materials, 14(11). https://doi.org/10.3390/ma14112861
MLA:
Künecke, Ulrike, Matthias Schuster, and Peter Wellmann. "Analysis of compositional gradients in Cu(In,Ga)(S,Se)2 solar cell absorbers using energy dispersive x-ray analysis with different acceleration energies." Materials 14.11 (2021).
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