Effect of the Donor Concentration on the Green Electroluminescence from Gallium Phosphide Diodes
- 1 January 1970
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 41 (1), 321-328
- https://doi.org/10.1063/1.1658342
Abstract
The optical properties of gallium phosphide green electroluminescent diodes formed by the in‐diffusion of zinc or beryllium into sulfur‐doped vapor‐phase epitaxial gallium phosphide have been studied as a function of donor concentration at temperatures between 77° to 350°K. At 77°K shallow‐donor‐shallow‐acceptor pair emission dominated for all diodes at high currents. At room temperature, bound exciton emission involving residual nitrogen impurities was dominant for lightly doped samples, while shallow‐donor‐valence‐band emission was dominant for samples with a donor concentration greater than 8×1017 cm−3. For both types of emission, the intensity at 300°K varied as exp (qV/kT). Relatively low efficiencies appeared to be a result of short nonradiative lifetimes in the vapor‐grown GaP. Electron microprobe measurements verified that variations in the positions of the emission lines from crystal to crystal were due to As contamination. An acceptor ionization energy of 56 meV was deduced for beryllium from a study of the low‐temperature emission spectra.Keywords
This publication has 27 references indexed in Scilit:
- Forward and Reverse Tunnel Currents in Gallium Phosphide Diffused p-n JunctionsJournal of Applied Physics, 1970
- Transport Properties of GaAs Obtained from Photoemission MeasurementsPhysical Review B, 1969
- Zinc Diffusion into Gallium Phosphide under High and Low Phosphorus OverpressureJournal of the Electrochemical Society, 1969
- Electrical and Optical Properties of Vapor-Grown GaPJournal of Applied Physics, 1968
- Properties of GaP Green-Light-Emitting Diodes Grown by Liquid-Phase EpitaxyJournal of Applied Physics, 1968
- Concentration Quenching of Luminescence by Donors or Acceptors in Gallium Phosphide and the Impurity-Band Auger ModelPhysical Review B, 1968
- The effect of the donor concentration on the optical efficiency of solution-grown GaP diodesSolid-State Electronics, 1968
- Green Electroluminescence from Gallium Phosphide Diodes near Room TemperatureJournal of Applied Physics, 1967
- Recombination Kinetics and Electroluminescence from Deep Levels in the Carrier Diffusion Region of aJunctionPhysical Review B, 1966
- Electroluminescent recombination near the energy gap in GaP diodesSolid-State Electronics, 1964