Time-resolved photoluminescence properties of hybrids based on inorganic AlGaN/GaN quantum wells and colloidal ZnO nanocrystals
2015 (English)In: Superlattices and Microstructures, ISSN 0749-6036, E-ISSN 1096-3677, Vol. 87, 38-41 p.Article in journal (Refereed) PublishedText
Dynamic properties are studied for the AlGaN/GaN quantum well (QW) structures with and without the coating of colloidal ZnO nanocrystals (NCs). The QW exciton recombination rate was reduced in such hybrids compared to the bare QW structure only in the sample with the thinnest cap layer of 3 nm. Assuming that one of the recombination mechanisms in this hybrid is non-radiative resonant energy transfer (NRET) between the QW and the energy acceptor material i.e. ZnO NCs, the maximum pumping efficiency was estimated to be similar to 42% at 60 K. The NRET effect is, however, vanished after several months despite that the hybrid structures are composed of chemically stable components. (C) 2015 Published by Elsevier Ltd.
Place, publisher, year, edition, pages
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD , 2015. Vol. 87, 38-41 p.
Quantum well structures; Energy transfer
Physical Sciences Chemical Sciences
IdentifiersURN: urn:nbn:se:liu:diva-123818DOI: 10.1016/j.spmi.2015.07.017ISI: 000366876100007OAI: oai:DiVA.org:liu-123818DiVA: diva2:892893
Funding Agencies|Swedish Research Council (VR); Carl Trygger Foundation; Angpanneforeningens Foundation for Research and Development2016-01-112016-01-112016-03-10