Chapter

Non-radiative recombination

Ivan Pelant and Jan Valenta

in Luminescence Spectroscopy of Semiconductors

Published in print February 2012 | ISBN: 9780199588336
Published online May 2012 | e-ISBN: 9780191738548 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199588336.003.0006
Non-radiative recombination

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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

Chapter.  5693 words.  Illustrated.

Subjects: Atomic, Molecular, and Optical Physics

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