Hilmi Volkan Demir - KTH

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White light generation tuned with nnano anocrystals crystals Hilmi Volkan Demir S. Nizamoglu, T. Ozel, E. Mutlugün, H. V. Demir Nanotechnology 18, 065709 (2007)
High‐quality, warm white LEDs integrated with nanocrystal y emitters • Warm white light (CCT< 3500 K) • Color rendering index (CRI~ (CRI 80) Indoors lighting (homes, offices, schools …), S. Nizamoglu, G. Zengin, H. V. Demir, Applied Physics Letters, 92, 031102 (2008). Hilmi Volkan Demir x= 0.4625 y= 0.3255 CCT= CCT 1982 K CRI= 79.55 x=0.3881 y=0.3177 CCT= 3190 K CRI =81.00 x=0.3799 y=0.3018 03018 CCT= 3228 K CRI=82.38
Page 1 and 2: Nanophotonics to Combat Climate Cha
Page 3 and 4: … a very unfortunate unfortunate,
Page 5 and 6: What factors determine earth’s cl
Page 7 and 8: Carbon dioxide IPCC Climate Change
Page 9 and 10: CO 2, temperature change, and sea l
Page 11 and 12: Problems in ecology • According t
Page 13 and 14: 1997 2009 How are we doing? Kyoto P
Page 15 and 16: Can nanotechnology help to combat c
Page 17 and 18: How can we combat climate change us
Page 19 and 20: How does solid state lighting (SSL)
Page 21 and 22: Motivation for white LEDs (WLEDs) i
Page 23 and 24: Potential market of LED‐based pro
Page 25 and 26: Phosphors vs. Nanophosphors Broad e
Page 27 and 28: Important photometric properties Fi
Page 29 and 30: Luminous efficacy (LE Luminous (LE
Page 31 and 32: Correlated color olor temperature (
Page 33 and 34: Nanocrystal quantum dot emitters 52
Page 35 and 36: Working principle energy transfer P
Page 37: Experimental achievement • Succes
Page 41 and 42: Photometric modeling • Aim: What
Page 43 and 44: Photometric trade‐offs T. Erdem ,
Page 45 and 46: Multilayered heteronanocrystals 1 0
Page 47 and 48: WLEDs tuned with onion‐like heter
Page 49 and 50: Optical Power P (a.uu) Surface stat
Page 51 and 52: Förster‐type energy transfer (FR
Page 53 and 54: Hybrid WLEDs enhanced enhancedwith
Page 55 and 56: Time‐resolved kinetics at donor e
Page 57 and 58: Kinetics of energy transfer S. Niza
Page 59 and 60: Green gap: green/yellow range J. M.
Page 61 and 62: Phhoton Count C 1000 100 10 Time‐
Page 63 and 64: FRET LEDs Color converted LED FRET-
Page 65 and 66: White light generating rresonant es
Page 67 and 68: Architectural tuning of color chrom
Page 69 and 70: Precise tuning of color with FRET C
Page 71 and 72: Ph.D. - Piled Higher and Deeper 3/1
Page 73 and 74: Localized plasmons • Collective l
Page 75 and 76: Physical explanation of localized p
Page 77 and 78: Dependence of resonance wavelength
Page 79 and 80: Plasmon‐coupled nanocrystals •
Page 81 and 82: Metal Enhanced Fluorescence Pompa e
Page 83 and 84: Scanning electron microscope (SEM)
Page 85 and 86: Our absorbance spectra of different
Page 87 and 88: Interactions between plasmons p and
Page 89 and 90:
Spectral design of plasmon‐couple
Page 91 and 92:
Photoluminnescence (couunts) 30000
Page 93 and 94:
Material on quartz substrate Only S
Page 95 and 96:
How can we combat climate change us
Page 97 and 98:
Today - in 2010 • Nanocrystal bas
Page 99 and 100:
Conclusions • Climate change is a
Page 101 and 102:
Device and Sensors Group Demir lab
Page 103 and 104:
Our research program • Biomimetic
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Hilmi Volkan Demir - KTH

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