Nizamoğlu, SedatMutlugün, EvrenÖzel, TuncayDemir, Hilmi VolkanSapra, S.Gaponik, N.Eychmüller, A.2016-02-082016-02-082008-11http://hdl.handle.net/11693/26770Date of Conference: 9-13 Nov. 2008Conference name: LEOS 2008 - 21st Annual Meeting of the IEEE Lasers and Electro-Optics SocietyIn this study, tuneable white light generation by controlling CdSe/ZnS/CdSe core/shell/shell heteronanocrystals integrated on InGaN/GaN light emitting diodes was presented. These multilayered quantum dots, also known as onion-like heterostructures, were designed and synthesized to emit in red (around 600 nm) from the CdSe core and in green (around 550 nm) from the CdSe shell. By designing and hybridizing these red-green emitting heterostructures on blue emitting LEDs, an integrated WLEDs on a single chip was demonstrated. By controlling the number of integrated heteronanocrystals, their (x,y) tristimulus coordinates were tuned from (0.26,0.23) to (0.37,0.36), along with their corresponding correlated color temperature tuned from 27413 K to 4192 K and the luminous efficacy of their optical radiation (the ratio of the emitted luminous flux to the radiant flux) tuned from 258 lm/W to 375 lm/W. Further investigation on the change of in-film optical properties of these heteronanocrystals with respect to their in-solution emission was performed.EnglishZinc compoundsLight emitting diodesNanocrystalsStimulated emissionOptical variables controlTemperatureLuminescenceQuantum dotsPhotoluminescencePhotometryConference Paper10.1109/LEOS.2008.4688841