Non-Radiative Processes in Crystals and in Nanocrystals. (1st January 2016)

• Record Type: Journal Article
• Authors: Collins, J.
• Is Part Of: ECS journal of solid state science and technology. Volume 5:Number 1(2016)
• Page Start: R3170
• Page End: R3184
• Publication Date: 2016-01-01
• Subjects: Adiabatic Approximation -- Electron-Phonon Coupling -- Line Broadening -- Line Shifting -- Nanocrystals -- Non-radiative Processes -- Phonon Density of States -- Phonon-Assisted Energy Transfer -- Vibronic; Solid state chemistry -- Periodicals; Electronics -- Materials -- Periodicals; Electrochemistry -- Periodicals; 541.0421
• DOI: 10.1149/2.0221601jss
• Languages: English
• ISSNs: 2162-8777

Abstract

Abstract : This paper discusses non-radiative processes that are relevant to the luminescence characteristics of optically active ions doped into insulators or large-gap semiconductors, with particular attention to how these processes are affected as the particle size is reduced from bulk single crystals to as small as a few nanometers. The non-radiative processes discussed in this article are thermal line broadening and thermal line shifting, relaxation via phonons between excited electronic states, vibronic emission and absorption, and phonon-assisted energy transfer. Given that one of the main effects of confinement in these particles is on the phonon density of states, we pay particular attention to how these non-radiative processes are altered due to the change in the phonon density of states as particle size decreases.