Abstract
Cu(In,Ga)Se2 (CIGS) thin films and solar cells were studied by photoacoustic spectroscopy (PAS) which is non-contact and non-destructive characterization of optical absorption properties. As preliminary experiment, the band gap of CIGS bulk alloy crystals were characterized by PAS, photoluminescence, and electroreflectance measurements, and the utilization of PAS was examined as the characterization of CIGS alloys. Photoacoustic (PA) spectra of CIGS thin films grown on a Mo/soda-lime glass (SLG) substrate showed the existence of the deep absorption band. The deep absorption band was observed only in PA spectra of CIGS/Mo/SLG films grown by three-stage method. The microphone-based PAS method detected the signal from the deep interface in CIGS/Mo/SLG structure sensitively. On the other hand, the PA spectrum of CdS/CIGS/Mo/SLG obtained by the transparent piezoelectric photo-thermal (Tr-PPT) method showed the clear absorption edge. Therefore, microphone-based PAS and Tr-PPT measurements can give complementary absorption properties of CIGS films.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callSimilar Papers
More From: Japanese Journal of Applied Physics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
