On conversion of luminescence into absorption and the van Roosbroeck-Shockley relation

Abstract

The problem of conversion of experimentally measured luminescence spectrum into the absorption cross section is revisited. The common practice of using the van Roosbroeck-Shockley (or Kubo-Martin-Schwinger or Kennard-Stepanov) relation in this context is incorrect because luminescence from semiconductors is essentially all due to the spontaneous emission component of the recombination of carriers distributed far-from-equilibrium. A simple, physically consistent, and practical prescription for converting the luminescence spectra into absorption is presented and its relation to the so-called nonequilibrium generalization of the van Roosbroeck-Shockley relationship is discussed.

3 pages, 2 figures

References in corpus (3)

• Excitonic Photoluminescence in Semiconductor Quantum Wells: Plasma versus Excitons
• Urbach tail studies by luminescence filtering in moderately doped bulk InP
• Alloy disorder effects on the room temperature optical properties of GaInNAs quantum wells

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