Fabrication and Optical Properties of ZnO Nanocrystal/GaN Quantum Well Based Hybrid Structures
Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
Optical properties of hybrid structures based on zinc oxide nanocrystals (NCs) and Gallium Nitride quantum well (QW) has been studied. The ZnO NCs thin films on the top of GaN QW structures were fabricated using spin coating. The surface morphology was characterized by scanning electron microscopy (SEM). We have performed temperature dependence time-resolved photoluminescence (TRPL) measurements of the bare AlGaN/GaN QW structures and hybrids, containing ZnO NCs. It was found that at some temperatures the QW PL decay has shorter decay time in the presence of ZnO NCs thin film compared to the bare QW. The effect was stronger for the samples with thinner cap layers. The results are discussed in terms of three models such as exciton nonradiative energy transfer (NRET), tunneling effect, and piezoelectric field influence on the QW exciton energy.
Place, publisher, year, edition, pages
2012. , 51 p.
ZnO, GaN, Hybrid Structure
Composite Science and Engineering
IdentifiersURN: urn:nbn:se:liu:diva-81675ISRN: LITH-IFM-A-EX--12/2671—SEOAI: oai:DiVA.org:liu-81675DiVA: diva2:555591
Subject / course
Thin Film Physics
2012-05-31, 10:15 (English)
UppsokPhysics, Chemistry, Mathematics
Pozina, Galia, Docent