Abstract
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 (λPL = 490 nm) intimately integrated on epitaxially-grown green InGaN/GaN QWs (λPL = 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.
Original language | English |
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Pages (from-to) | 178-180 |
Number of pages | 3 |
Journal | Physica Status Solidi - Rapid Research Letters |
Volume | 4 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2010 Jul |
Externally published | Yes |
Keywords
- Energy transfer
- Nanoscale
- Quantum dots
- Semiconductors
- Solar cells
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics