Open AccessA STUDY ON PHOTOLUMINESCENCE IN a-C:H FILMS
Author(s) -
陈光华,
阎少光,
Zhang Fang qing
Publication year - 1992
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.41.500
Subject(s) - photoluminescence , annealing (glass) , materials science , spectral line , wavelength , excitation , excitation wavelength , analytical chemistry (journal) , photoluminescence excitation , band gap , optoelectronics , atomic physics , physics , chemistry , chromatography , quantum mechanics , astronomy , composite material
In this paper, the changes of photoluminescence (PL) spectra according to varied measuring temperatures, annealing temperatures, and excition wavelength in a-C:H films deposited by rf glow discharge are studied. The experimental results show that the PL efficiency becomes lower with increasing the measuring temperature or annealing temperature. We give an explanation to the phenomena using the two-phase model in a-C:H system. Furthermore, the PL spectra also changes with excitation energy; and as the latter geis near the optical gap Eopt, the emission intensity reaches its maximum.