Optical transitions via the deep O donor in GaP. II. Temperature dependence of cross sections
- 15 July 1978
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 18 (2), 830-843
- https://doi.org/10.1103/physrevb.18.830
Abstract
A detailed experimental study of temperature dependence of optical cross sections for the GaP: O one-electron state for K is presented. Broadening effects on the edge as well as temperature shift of the deep-level binding energy and spectral variations of the measured cross section with temperature are treated. In our purely optical data from bulk material the overall broadening of the edge for and is well explained (∼15% accuracy) by absorption of configuration-coordinate phonon quanta in the optical transitions, apart from an anomalous behavior below 30 K. The 0.9-eV O level is nearly pinned to the valence band below 175 K () while above this temperature seems to decrease gradually. The temperature-dependent spectral behavior of the cross sections seems to be due to the presence of two different levels related to the one-electron O state where the new level is situated 80±20 meV above the previously established 0.9-eV level. The apparent temperature dependence of the part of the cross sections associated with the 0.9-eV level is described in terms of a thermal activation energy of 0.4 meV.
Keywords
This publication has 26 references indexed in Scilit:
- Optical transitions via the deep O donor in GaP. I. Phonon interaction in low-temperature spectraPhysical Review B, 1978
- Entropy of ionization and temperature variation of ionization levels of defects in semiconductorsPhysical Review B, 1976
- Phonon interaction in optical transitions via the deep O donor in GaPJournal of Luminescence, 1976
- The dielectric constant of GaP from a refined analysis of donor-acceptor pair luminescence, and the deviation of the pair energy from the coulomb lawJournal of Luminescence, 1973
- Photocapacitance Studies of the Oxygen Donor in GaP. I. Optical Cross Sections, Energy Levels, and ConcentrationPhysical Review B, 1973
- Radiative and Nonradiative Recombination at Neutral Oxygen in-Type GaPPhysical Review B, 1971
- Electron-Capture ("Internal") Luminescence from the Oxygen Donor in Gallium PhosphidePhysical Review B, 1968
- Band Gap of Gallium Phosphide from 0 to 900°K and Light Emission from Diodes at High TemperaturesPhysical Review B, 1968
- Infrared Donor-Acceptor Pair Spectra Involving the Deep Oxygen Donor in Gallium PhosphidePhysical Review B, 1968
- Intrinsic Absorption-Edge Spectrum of Gallium PhosphidePhysical Review B, 1966