Open AccessЛюминесценция и стимулированное излучение поликристаллических пленок Cu(In,Ga)Se-=SUB=-2-=/SUB=-, осажденных методом магнетотронного напыления
Author(s) -
И. Е. Свитенков,
В. Н. Павловский,
Е. В. Луценко,
Г. П. Яблонский,
В.Я. Ширипов,
E. Khokhlov,
А. В. Мудрый,
V. D. Zhivulko,
О. М. Бородавченко,
М.В. Якушев
Publication year - 2018
Publication title -
fizika i tehnika poluprovodnikov
Language(s) - English
Resource type - Journals
eISSN - 1726-7315
pISSN - 0015-3222
DOI - 10.21883/ftp.2018.10.46450.8880
Subject(s) - analytical chemistry (journal) , materials science , substrate (aquarium) , thin film , luminescence , molybdenum , scanning electron microscope , nanosecond , layer (electronics) , sputter deposition , sputtering , laser , optoelectronics , chemistry , optics , metallurgy , nanotechnology , oceanography , physics , chromatography , geology , composite material
The stimulated emission of Cu(In,Ga)Se_2 alloy thin films formed by magnetron-assisted sputtering onto a sodium-fluoride layer deposited onto a molybdenum layer on a glass substrate is observed. The structural and optical parameters of the films are determined by scanning electron microscopy, local X-ray spectral microanalysis, X-ray structural analysis, and low-temperature luminescence ( T = 10 K) measurements in the range of excitation levels of 1.6–75 kW cm^–2 provided by nanosecond nitrogen-laser pulses. The stimulated emission threshold corresponds to ~25 kW cm^–2. Comparative analysis of the emission of Cu(In,Ga)Se_2 thin films suggests that the introduction of sodium results in significant improvement of the structural quality, specifically, in a decrease in the density of energy states in the band tails and in a decrease in the concentration of nonradiative-recombination centers.