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Nonradiative resonance energy transfer directed from colloidal CdSe/ZnS quantum dots to epitaxial InGaN/GaN quantum wells for solar cells
Author(s) -
Nizamoglu Sedat,
Sari Emre,
Baek JongHyeob,
Lee InHwan,
Demir Hilmi Volkan
Publication year - 2010
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201004176
Subject(s) - quantum dot , photoluminescence , epitaxy , optoelectronics , quantum well , cyan , materials science , exciton , acceptor , indium gallium nitride , dipole , gallium nitride , nanotechnology , chemistry , condensed matter physics , physics , optics , laser , layer (electronics) , organic chemistry
We report on Förster‐type nonradiative resonance energy transfer (NRET) directed from colloidal quantum dots (QDs) to epitaxial quantum wells (QWs) with an efficiency of 69.6% at a rate of 1.527 ns –1 for potential application in III‐nitride based photovoltaics. This hybrid exciton generation–collection system consists of chemically‐synthesized cyan CdSe/ZnS core/shell QDs (λ PL = 490 nm) intimately integrated on epitaxially‐grown green InGaN/GaN QWs (λ PL = 512 nm). To demonstrate directional NRET from donor QDs to acceptor QWs, we simultaneously show the decreased photoluminescence decay lifetime of dots and increased lifetime of wells in the hybrid dipole–dipole coupled system. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)