Demir Hilmi Volkan, Nizamoglu Sedat, Mutlugun Evren, Ozel Tuncay, Sapra Sameer, Gaponik Nikolai, Eychmüller Alexander
Department of Physics, Department of Electrical and Electronics Engineering, Nanotechnology Research Center, and Institute of Materials Science and Nanotechnology, Bilkent University, Ankara 06800, Turkey.
Nanotechnology. 2008 Aug 20;19(33):335203. doi: 10.1088/0957-4484/19/33/335203. Epub 2008 Jul 7.
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.
我们展示了由集成在氮化铟镓/氮化镓发光二极管（LED）上的洋葱状硒化镉/硫化锌/硒化镉核/壳/壳异质纳米晶体制成的多色量子点-量子阱发射器控制和调谐的白光产生。我们通过控制集成的红绿发光异质纳米晶体的数量，展示了混合白光LED，其（x，y）三刺激坐标从（0.26，0.33）调谐到（0.37，0.36），相关色温从27413 K到4192 K。我们研究了这些多层异质纳米晶体的膜内发射相对于其溶液内发射的变化，这在混合LED应用中起着重要作用。我们的原理验证实验表明，这些复杂的异质纳米晶体有望在未来的混合白光LED中用作纳米发光体。
