The effect of different confinement layers on the luminescence of InGaN single quantum well structures grown by MOCVD was studied. The brightest photoluminescence was observed for samples with superlattice (SL) confinement layers with internal quantum efficiencies reaching 90%. Picosecond carrier transport and capture investigations using wavelength dependent pump-probe measurements indicated that the enhanced luminescence efficiency of the samples with SL cladding layers is caused by the capture of carriers from the SL confinement region. The "funneling" effect is discussed with respect to the confinement layer design in the individual structures and the carrier lifetime.
|Number of pages||4|
|Journal||Physica Status Solidi (B) Basic Research|
|Publication status||Published - 1999 Jan 1|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics