We proposed and demonstrated architectural tuning of color chromaticity by controlling photoluminescence decay kinetics through nonradiative Förster resonance energy transfer in the heterostructure of layer-by-layer spaced CdTe nanocrystal (NC) solids. We achieved highly sensitive tuning by precisely adjusting the energy transfer efficiency from donor NCs to acceptor NCs via controlling interspacing between them at the nanoscale. By modifying decay lifetimes of donors from 12.05 to 2.96 ns and acceptors from 3.68 to 14.57 ns, we fine-tuned chromaticity coordinates from to (0.632, 0.367). This structural adjustment enabled a postsynthesis color tuning capability, alternative or additive to using the size, shape, and composition of NCs.
Structural tuning of color chromaticity through nonradiative energy transfer by interspacing CdTe nanocrystal monolayers
Neslihan Cicek, Sedat Nizamoglu, Tuncay Ozel, Evren Mutlugun, Durmus Ugur Karatay, Vladimir Lesnyak, Tobias Otto, Nikolai Gaponik, Alexander Eychmüller, Hilmi Volkan Demir; Structural tuning of color chromaticity through nonradiative energy transfer by interspacing CdTe nanocrystal monolayers. Appl. Phys. Lett. 9 February 2009; 94 (6): 061105. https://doi.org/10.1063/1.3079679
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