title: Tuning shades of white light with multi-color quantum-dot-quantum-well emitters based on onion-like CdSe-ZnS heteronanocrystals.
abstract: We present white light generation controlled and tuned by multi-color quantum-dot-quantum-well emitters made of onion-like CdSe/ZnS/CdSe core/shell/shell heteronanocrystals integrated on InGaN/GaN light-emitting diodes (LEDs). We demonstrate hybrid white LEDs with (x, y) tristimulus coordinates tuned from (0.26, 0.33) to (0.37, 0.36) and correlated color temperatures from 27 413 to 4192 K by controlling the number of their integrated red-green-emitting heteronanocrystals. We investigate the modification of in-film emission from these multi-layered heteronanocrystals with respect to their in-solution emission, which plays a significant role in hybrid LED applications. Our proof-of-principle experiments indicate that these complex heteronanocrystals hold promise for use as nanoluminophors in future hybrid white LEDs.
authors: Department of Physics, Department of Electrical and Electronics Engineering, Nanotechnology Research Center, and Institute of Materials Science and Nanotechnology, Bilkent University, Ankara 06800, Turkey.
authors: Hilmi Volkan
authors: HV
authors: Demir
authors: Sedat
authors: S
authors: Nizamoglu
authors: Evren
authors: E
authors: Mutlugun
authors: Tuncay
authors: T
authors: Ozel
authors: Sameer
authors: S
authors: Sapra
authors: Nikolai
authors: N
authors: Gaponik
authors: Alexander
authors: A
authors: Eychmüller