DocumentCode
3711075
Title
Compositional dependence photoluminescence study of polycrystalline CuGaSe2 thin films
Author
Muhammad Monirul Islam;Hajime Shibata;Koji Matsubara;Shigeru Niki;Takeaki Sakurai;Katsuhiro Akimoto
Author_Institution
Division of Applied Physics, Faculty of Pure and Applied Science, University of Tsukuba, Ibaraki 305-8573, Japan
fYear
2015
fDate
6/1/2015 12:00:00 AM
Firstpage
1
Lastpage
4
Abstract
CuGaSe2 thin films with different Cu/Ga ratio were studied using photoluminescence (PL) method. Measurement at 1.4 K shows asymmetrically broadened PL spectra for all the samples where PL-peaks shift to lower energy with a decrease of the Cu/Ga ratio. Excitation power and temperature dependent PL spectra were explained using donor to acceptor pair transition under the influence of potential fluctuation. Magnitude of the potential fluctuation was calculated from lower energy tail of the emission spectra. Effect of Cu-deficiency on the properties of the CuGaSe2 films and fabricated solar cells were discussed in relation to the potential fluctuation at the band-edge.
Keywords
"Fluctuations","Temperature measurement","Films","Photovoltaic cells","Semiconductor device measurement","Photonic band gap","Photoluminescence"
Publisher
ieee
Conference_Titel
Photovoltaic Specialist Conference (PVSC), 2015 IEEE 42nd
Type
conf
DOI
10.1109/PVSC.2015.7355791
Filename
7355791
Link To Document