Optical Transitions in InGaPN/GaP Single Quantum Wells on GaP(100) Substrates by MOVPE

Author:

Sanorpim S.1,Kaewket D.1,Tungasmita Sukkaneste1,Katayama R.2,Onabe Kentaro2

Affiliation:

1. Chulalongkorn University

2. University of Tokyo

Abstract

Optical transitions in the In0.050Ga0.950P0.975N0.025/GaP lattice-matched single quantum wells (SQWs) with different well widths (LZ = 1.6 - 6.4 nm) have been investigated by low-temperature photoluminescence (PL) and PL-excitation (PLE). PL spectra showed the strong visible emission from the samples which attracted to a variety of optoelectronic device applications such as light emitting and laser diodes. Comparing to the bulk film, the PL peak position and the fundamental absorption edge of PLE spectra exhibit blue-shift, which is corresponded to the quantum confinement effect by the well. Comparison between the absorption edge of PLE spectra and the finite square well calculation demonstrate that the effective bandgap energy of the InGaPN/GaP system is might be originated mainly from the N-related localized states.

Publisher

Trans Tech Publications, Ltd.

Subject

General Engineering

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