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- W2051287337 abstract "Green light-emitting diodes (LEDs) have been fabricated by Zn diffusion into vapor phase epitaxial (VPE) GaP grown by the PH3HClGaH2 technique with nitrogen doping achieved by adding NH3 to the gas stream. The diffusion was carried out at 900°C using a totally vaporizing source of Zn and P in a closed ampoule. The junction depth, surface concentration and diode performance are reported as a function of Zn pressure during diffusion. The diode properties, such as capacitance-voltage and current- and flux-voltage characteristics, were investigated. The slope of the log I vs V plot was found to be ∼12kT at low voltages. This component of the diode current was found to be nonradiative and to be purely a surface leakage current which disappears for diodes with large perimeter-to-area ratios. In these diodes with long lifetimes and low ND − NA, the effect of conductivity modulation was observed in the diode characteristics. The optimum conditions for high efficiency LEDs were found to be ND < 1017 cm−3, NZn ⩽ 2 × 1018 cm−3, NN ∼ 4 × 1018 cm−3, PA < 100 cm−1 and dislocation density <104 cm−2. Following this prescription, quantum efficiencies as high as 0·12% at 10 A/cm2 have been achieved for oil (n = 1·55) encapsulated diodes with reflective back contacts." @default.
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- W2051287337 date "1975-11-01" @default.
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- W2051287337 title "Green-emitting diodes in vapor phase epitaxial GaP" @default.
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- W2051287337 doi "https://doi.org/10.1016/0038-1101(75)90121-5" @default.
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