Interdiffusion of in and Ga in InGaN/GaN multiple quantum wells

Chang Cheng Chuo, Chia Ming Lee, Jen Inn Chyi

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83 Scopus citations

Abstract

Thermal stability of InxGa1-xN/GaN multiple quantum wells with InN mole fraction of ∼0.23 and ∼0.30 was investigated by postgrowth thermal annealing. Low temperature photoluminescence spectroscopy was employed to determine the temperature dependence of the interdiffusion coefficient of In and Ga in InGaN/GaN quantum wells. The interdiffusion process is characterized by a single activation energy of about 3.4±0.5 eV and governed by vacancy-controlled second-nearest-neighbor hopping. Due to composition inhomogeneity, lower diffusivity is observed at the early stage of thermal annealing.

Original languageEnglish
Pages (from-to)314-316
Number of pages3
JournalApplied Physics Letters
Volume78
Issue number3
DOIs
StatePublished - 15 Jan 2001

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