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|Type:||Artigo de periódico|
|Title:||Many-body And Hot-phonon Effects In The Radiative Emission Spectrum Of Cds Under High Excitation Intensities|
|Abstract:||We present here experimental results concerning the photoluminescence spectrum of CdS under high excitation intensities. With increasing excitation intensity the single emission band observed at 77 °K shows a peak displacement towards lower energies, and enhancement of its low-energy side as well as of its high-energy side. These effects increase with excitation intensity. We develop a complete model that can account for the above behavior and the emission band shape. The broadening is mainly due to nonequilibrium distribution of LO phonons, though contributions to the high-energy side from hot electrons is quite significant. Self-energy corrections account for the band reduction and consequently to the shift of the luminescence band peak towards lower energies. © 1975 The American Physical Society.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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