Effect of photodarkening on photoluminescence dynamics in CdS-doped glass

• Published in: Journal of luminescence Vol. 90; no. 3; pp. 129 - 134
• Main Authors: Malý, P, Miyoshi, T
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.08.2000; Elsevier
• Subjects: Amorphous semiconductors; glasses; Amorphous semiconductors; glasses; nanocrystalline materials; CdS; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of specific thin films; Other solid inorganic materials; Photodarkening; Photoluminescence; Physics; Semiconductor nanocrystals; 78.47.+p; CdS; Semiconductor nanocrystals; 73.20.−r; Photoluminescence; Photodarkening; 78.55.−m; Inorganic compounds; Transition element compounds; Cadmium sulfides; Photoinduced effect; Semiconductor doped glasses; Experimental study; Darkening; Nanocrystal; Luminescence decay
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/S0022-2313(99)00618-3

We have studied the effect of photodarkening on photoluminescence dynamics in CdS nanocrystals in glass. We have found that the commonly observed increase in the decay rate during photodarkening is spectrally selective, being limited only to the photoluminescence spectral region generally related with carriers in nanocrystal interior states or in shallow traps. On the contrary, the photoluminescence decay rate is exponentially dependent on photon energy (exponential constant of 0.8 eV for the fresh sample) in the spectral interval covering the whole photoluminescence spectrum.