Lateral diffusion of photogenerated carriers in InGaN/GaN heterostructures observed by PL measurements

DOI to cite this document:: 10.5283/epub.12471

Vierheilig, Clemens ; Braun, H. ; Schwarz, Ulrich ; Wegscheider, Werner ; Baur, E. ; Strauß, U. ; Härle, Volker

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Date of publication of this fulltext: 25 Jan 2010 13:46

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Abstract

In this paper we present a direct observation of the lateral diffusion of photogenerated carriers in InGaN/GaN quantum wells. The spatial distribution of the photoluminescence around a small exciting laser spot is analyzed by scanning in the focal plane of our confocal microscope. The results of a blue and a green emitting sample at varying excitation densities are discussed in the context of the ...