Title :
Optical-fiber-based, time-resolved photoluminescence spectrometer for thin-film absorber characterization and analysis of TRPL data for CdS/CdTe interface
Author :
Kuciauskas, Darius ; Duenow, Joel N. ; Kanevce, Ana ; Li, Jian V. ; Young, Matthew R. ; Dippo, Pat ; Levi, Dean H.
Author_Institution :
Nat. Renewable Energy Lab., Golden, CO, USA
Abstract :
We describe the design of a time resolved photoluminescence (TRPL) spectrometer for rapid semiconductor absorber characterization. Simplicity and flexibility is achieved by using single optical fiber to deliver laser pulses and to collect photoluminescence. We apply TRPL for characterization of CdS/CdTe absorbers after deposition, CdCl2 treatment, Cu doping, and back contact formation. Data suggest this method could be applied in various stages of PV device processing. Finally, we show how to analyze TRPL data for CdS/CdTe absorbers by considering laser light absorption depth and intermixing at CdS/CdTe interface.
Keywords :
cadmium compounds; light absorption; optical fibres; photoluminescence; semiconductor thin films; solar absorber-convertors; solar cells; thin film devices; CdS-CdTe; PV device processing; TRPL data analysis; TRPL spectrometer; laser light absorption depth; laser pulses; optical-fiber-based spectrometer; semiconductor absorber characterization; thin-film absorber characterization; time-resolved photoluminescence spectrometer; Instruments; Junctions; Laser excitation; Measurement by laser beam; Radiative recombination; Semiconductor device measurement; Wavelength measurement; CdTe; Time-resolved photoluminescence; lifetime; thin-film photovoltaics;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2012 38th IEEE
Conference_Location :
Austin, TX
Print_ISBN :
978-1-4673-0064-3
DOI :
10.1109/PVSC.2012.6317927
