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Title: Excitation and Fe concentration dependences in the impulse photoconductance of InP:Fe

Abstract

We report impulse response measurements on InP:Fe photoconductors excited by laser and electron beam radiation. Measurements are reported on crystals with Fe concentrations from 2 x 10/sup 15/ cm/sup -3/ to 4 x 10/sup 16/ cm/sup -3/ and with excited electron-hole-pair densities of approx.10/sup 12/ cm/sup -3/ and 9 x 10/sup 17/ cm/sup -3/. Measured signal decays are purely exponential in character, and decay times are inversely related to Fe concentration. No long-lived tails are observed. Decay times show no dependence on excitation level for excited carrier concentrations that are well above and well below the Fe concentrations. The magnitude of the photoresponse indicates that electrons and not holes are the primary current carriers. The data suggest that for impulse excitation photoconductance decay in InP:Fe is due to trap-assisted recombination of electrons and holes at the Fe sites, with a rate determined by the species with the slower capture rate.

Authors:
; ; ;
Publication Date:
Research Org.:
Electronics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
OSTI Identifier:
5152920
Resource Type:
Journal Article
Journal Name:
Appl. Phys. Lett.; (United States)
Additional Journal Information:
Journal Volume: 44:6
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ELECTRON BEAMS; COLLISIONS; INDIUM PHOSPHIDES; CHARGE CARRIERS; ELECTRON COLLISIONS; IMPURITIES; PHOTOCONDUCTIVITY; PHOTON COLLISIONS; CARRIER DENSITY; CRYSTAL DOPING; EXCITATION; HOLES; IRON IONS; RECOMBINATION; RESPONSE FUNCTIONS; TRAPPING; TRAPS; BEAMS; CHARGED PARTICLES; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ENERGY-LEVEL TRANSITIONS; FUNCTIONS; INDIUM COMPOUNDS; IONS; LEPTON BEAMS; PARTICLE BEAMS; PHOSPHIDES; PHOSPHORUS COMPOUNDS; PHYSICAL PROPERTIES; PNICTIDES; 360603* - Materials- Properties

Citation Formats

Hammond, R B, Paulter, N G, Wagner, R S, and Springer, T E. Excitation and Fe concentration dependences in the impulse photoconductance of InP:Fe. United States: N. p., 1984. Web. doi:10.1063/1.94855.
Hammond, R B, Paulter, N G, Wagner, R S, & Springer, T E. Excitation and Fe concentration dependences in the impulse photoconductance of InP:Fe. United States. https://doi.org/10.1063/1.94855
Hammond, R B, Paulter, N G, Wagner, R S, and Springer, T E. 1984. "Excitation and Fe concentration dependences in the impulse photoconductance of InP:Fe". United States. https://doi.org/10.1063/1.94855.
@article{osti_5152920,
title = {Excitation and Fe concentration dependences in the impulse photoconductance of InP:Fe},
author = {Hammond, R B and Paulter, N G and Wagner, R S and Springer, T E},
abstractNote = {We report impulse response measurements on InP:Fe photoconductors excited by laser and electron beam radiation. Measurements are reported on crystals with Fe concentrations from 2 x 10/sup 15/ cm/sup -3/ to 4 x 10/sup 16/ cm/sup -3/ and with excited electron-hole-pair densities of approx.10/sup 12/ cm/sup -3/ and 9 x 10/sup 17/ cm/sup -3/. Measured signal decays are purely exponential in character, and decay times are inversely related to Fe concentration. No long-lived tails are observed. Decay times show no dependence on excitation level for excited carrier concentrations that are well above and well below the Fe concentrations. The magnitude of the photoresponse indicates that electrons and not holes are the primary current carriers. The data suggest that for impulse excitation photoconductance decay in InP:Fe is due to trap-assisted recombination of electrons and holes at the Fe sites, with a rate determined by the species with the slower capture rate.},
doi = {10.1063/1.94855},
url = {https://www.osti.gov/biblio/5152920}, journal = {Appl. Phys. Lett.; (United States)},
number = ,
volume = 44:6,
place = {United States},
year = {1984},
month = {3}
}