Increased color conversion efficiency in hybrid light emitting diodes utilizing non-radiative energy transfer

Details Increased color conversion efficiency in hybrid light emitting diodes utilizing non-radiative energy transfer Increased color conversion efficiency in hybrid light emitting diodes utilizing non-radiative energy transfer

2009-07-29

arxiv.org/abs/0907.5152v1

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

We fabricate a highly efficient colour conversion light emitting diode consisting of surface-patterned blue emitters and semiconductor colloidal nanocrystal quantum dots (NQDs). Electrically injected carriers in the blue emitter (donor) are efficiently transferred to the NQDs (acceptor) via nonradiative energy transfer in addition to conventional radiative energy transfer. The existence of nonradiative energy transfer is verified by the simultaneous observation of increased donor emission decay rate, the transient transfer of carriers at the acceptor and a 2-fold enhancement of the NQD electroluminescence.

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