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Luminescence Spectroscopy of Semiconductors$
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Ivan Pelant and Jan Valenta

Print publication date: 2012

Print ISBN-13: 9780199588336

Published to Oxford Scholarship Online: May 2012

DOI: 10.1093/acprof:oso/9780199588336.001.0001

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6 Non-radiative recombination

6 Non-radiative recombination

(p.148) 6 Non-radiative recombination
Luminescence Spectroscopy of Semiconductors

Ivan Pelant

Jan Valenta

Oxford University Press

Nonradiative recombination involves various kinds of transformation of the electronic excitation energy into other types of energy than light. Instead of being emitted as luminescence, there are three basic ways how the excitation energy can be nonradiatively dissipated: (i) transformation into heat, which comprises multiphonon nonradiative recombination, surface recombination and Auger recombination, (ii) creation of lattice defects and (iii) photochemical changes of the electronically excited material. Relevant kinetic equations are outlined. Criteria conditioning the occurrence of particular processes are discussed. A noteworthy case of the competition between photochemical sensitivity and photoluminescence efficiency in silver halides as a function of temperature is addressed.

Keywords:   multiphonon recombination, surface recombination, auger recombination, lattice defects, photochemical reactions

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