Mechanism of luminescence in InGaN/GaN multiple quantum wells

H. C. Yang*, P. F. Kuo, T. Y. Lin, Y. F. Chen, K. H. Chen, L. C. Chen, Jen Inn Chyi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

79 Citations (Scopus)


We report a firm evidence of luminescence from InN clusters in InGaN/GaN multiple quantum wells. Photoluminescence, photoluminescence excitation, and Raman scattering measurements have been employed to study the optical properties of InGaN/GaN multiple quantum wells. A careful examination of the low energy shoulders of the main peak luminescence reveals the fact that their separation is in good agreement with the longitudinal optical phonon energy of pure InN film measured by Raman scattering. A large Stokes-like shift between the emission peak energy and the absorption edge is found; it increases with increasing indium content. All these observations can be explained in a consistent way by the effect of localization due to self-organized InN clusters within InGaN layers. Our results thus strongly suggest that the emission mechanism of InGaN/GaN quantum wells originates from radiation recombination within the localized states of self-organized InN clusters.

Original languageEnglish
Pages (from-to)3712-3714
Number of pages3
JournalApplied Physics Letters
Issue number25
Publication statusPublished - 2000 Jun 19

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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