Proceedings of nanoGe Fall Meeting19 (NFM19)
DOI: https://doi.org/10.29363/nanoge.nfm.2019.116
Publication date: 18th July 2019
Lead halide perovskite nanocrystals (LHP NCs) have emerged as outstanding light emitters exhibiting luminescence with near unity quantum yield and narrow linewidth that can be tuned across the visible spectrum via facile ion exchange reactions. The talk will discuss recent work on the photophysics and optoelectronic applications of such nanomaterials, with emphasis on the following:
(i) Green-emitting CsPbBr3 and red-emitting FAPbI3 NCs exhibit efficient amplified spontaneous emission with high net modal gain and low threshold making them attractive for optically pumped solution-processed lasers1.
(ii) Intense photoexcitation generates long-lived hot carriers in FAPbI3 NCs2,3, making them promising candidates for hot solar cells. Furthermore the produced hot electron–hole gas appears to influence the energetics and dynamics of the radiative recombination via a competition between the stimulated emission and the emission from non-thermalized carriers3.
(iii) Efficient light emitting structures are demonstrated via two routes: 1. Using LHP NCs as robust downconverters of blue-emitting GaN nanohole array emitters and 2. Employing electronic-functionalized solids of such NCs in the active region of solution-processed electroluminescent devices.
(iv) Encapsulation of LHP NCs into polymer nanofibers yields robust composites exhibiting bright emission, improved air- and water-stability and potential applications in textile-based LED devices4
The work is supported by the Research Promotion Foundation of Cyprus, under the Grant “NANOSONICS”, Grant Agreement No. "INFRASTRUCTURES/1216/0004".
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