Picture of wind turbine against blue sky

Open Access research with a real impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

The Energy Systems Research Unit (ESRU) within Strathclyde's Department of Mechanical and Aerospace Engineering is producing Open Access research that can help society deploy and optimise renewable energy systems, such as wind turbine technology.

Explore wind turbine research in Strathprints

Explore all of Strathclyde's Open Access research content

Investigation of the unusual temperature dependence of ingan/gan quantum well photoluminescence over a range of emission energies

Pecharroman-Gallego, R and Martin, R W and Watson, I M (2004) Investigation of the unusual temperature dependence of ingan/gan quantum well photoluminescence over a range of emission energies. Journal of Physics D: Applied Physics, 37 (21). pp. 2954-2961. ISSN 0022-3727

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

An analysis of photoluminescence (PL) spectra for a range of single and multiple InGaN/GaN quantum wells, as a function of temperature, is presented. The well-known anomalous 'S-shape' behaviour is observed for samples emitting over a very wide range of energies. We present an analysis of this range of data, supplemented by other published data, in terms of different types of recombination sites within the wells. A quantitative model, based on previous work, to fit the temperature dependence of the emission peak energy is developed and gives good fits over an extended temperature range. The fitting parameters obtained are discussed in the light of values obtained from the literature and the intense piezoelectric fields present in the samples. Furthermore, the linewidth dependence of the PL emission peak energy in the region of the 'S-shape' is also analysed.