Architectural tuning of color chromaticity by controlled nonradiative resonance energy transfer in CdTe nanocrystal solids

• Published in: 2009 IEEE LEOS Annual Meeting Conference Proceedings pp. 636 - 637
• Main Authors: Cicek, Neslihan, Nizamoglu, Sedat, Ozel, Tuncay, Mutlugun, Evren, Karatay, Durmus Ugur, Otto, Tobias, Lesnyak, Vladimir, Gaponik, Nikolai, Eychmuller, Alexander, Demir, Hilmi Volkan
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-10-2009
• Subjects: Additives; Energy exchange; Kinetic theory; Nanocrystals; Photometry; Resonance; Shape control; Size control; Solids; Steady-state
• ISBN: 9781424436804; 142443680X
• ISSN: 1092-8081; 2766-1733
• DOI: 10.1109/LEOS.2009.5343408

In recent years, precisely tuning shades of white across color chromaticity diagram has become critically important in solid state lighting, especially to achieve application specific spectrally tuned illumination [1]. In this respect, semiconductor quantum dot nanocrystals (NCs) have attracted significant attention for their use as luminophors in light-emitting diodes (LEDs). This is mainly because it is possible to conveniently control the electronic structure of these nanocrystals by adjusting their size, shape, and composition [2]. However, such tuning is only limited to the process of nanocrystal synthesis in which the size, shape, and composition are controlled. Here we propose and demonstrate an alternative, post-synthesis, architectural approach to tune the color of nanocrystal emitters by controlling their radiative decay kinetics and steady state spontaneous emission using nonradiative Förster resonance energy transfer (FRET). For the proof-of-concept demonstration of such FRET-controlled tuning, we constructed nanocrystal solids that are layer by layer assembled with interlayer spacings between them precisely controlled at the nanoscale [3].