학술논문
X-ray spectroscopic analysis of the growth of CBD-CdS buffers on flexible Cu(In,Ga)Se2 thin-film solar cell structures
Document Type
Conference
Author
Source
2012 38th IEEE Photovoltaic Specialists Conference Photovoltaic Specialists Conference (PVSC), 2012 38th IEEE. :001682-001687 Jun, 2012
Subject
Language
ISSN
0160-8371
Abstract
The chemical bath deposition (CBD) of CdS layers on Cu(In,Ga)Se 2 (“CIGSe”) absorbers on flexible polyimide substrates is examined using a combination of soft x-ray emission (XES) and photoelectron (XPS) spectroscopies. For this purpose, absorbers with with varying degrees of Cu-deficiency and NaF precursor thickness were studied. From the data, a detailed picture of the chemical surface composition (in particular the carbon and oxygen contamination) of the CBD-CdS layers can be drawn. The thickness and deposition rates were determined by monitoring the CdS-induced attenuation of the In 3d 5/2 XPS and In M 4,5 XES signals of the absorber, finding no significant impact of Na and/or Cu content of the CIGSe.