Light-emission Tunability

Y Geng, ACA Chen, JJ Ou, SH Chen, K Klubek, KM Vaeth, and CW Tang, Monodisperse glassy-nematic conjugated oligomers with chemically tunable polarized light emission, Chem. Mater., 15 4352-4360, 2003. 

Electron-hole pairs may bind to each other to form excitons, which can be either free or tied to impurities or defects.1218 The decay of such excitons can lead to light emission that may be tunable by, for example, quantum confinement. Such excitonic emission is thus under active investigation in quantum well, wire, and dot... 

Copolymers containing alternating l,4-bis(phenylethenyl)benzene, l,4-bis(phenylethenyl)-2,5-dimethoxybenzene or l,5-bis(phenylethenyl)naphthalene chromophores, and dibenzo-24-crown-8 spacers within the polymer backbone, best represented by 87, showed blue light emission in solution, and tunable photoluminescence and electroluminescence depending on the structure of the chromophore. Blends of these copolymers with a small amount of poly(ethylene oxide), and lithium salt as active layers, form efficient light-emitting electrochemical cells <2003JMC800>. 

Chen J., Shen N.H., Cheng C., Fan X.Y., Ding J.J. and Wang H.T., (2006) Tunable resonance in surface-plasmon-polariton enhanced spontaneous emission using a denser dielectric cladding, Appi. Phys. Lett. 89 051916 Paiella R., (2005) Tunable surface plasmons in coupied metaiio-dieiectric muitiple layers for light-emission efficiency enhancement, Appi. Phys. Lett. 87 111104(2005). 

GaAs Better optical properties than Si Higher electron mobility for fast devices Ga can be partially replaced with A1 (AbGai cAs) for tunable light emission Dominates high-performance optical and wireless devices... 

The introduction of a tetrazolate ligand on rhenium complexes allows for a tunability of the photophysical properties of these species. The use of a simple protonation-deprotonation protocol enables to reversibly change, light-emission output and performance of a series of Re(i)-aryl tetrazolate-based phosphors. ... 

The size of a quantum dot is important for the tunable light emission characteristic. A small... 

Xu Y, Nagai A, Jiang D (2013) Core-shell conjugated microporous polymers a new strategy for exploring color-tunable and -controllable light emissions. Chem Commun 49 1591-1593... 

The investigators also demonstrated that a wide-range tunable white light emission from cool to warm white with high quantum yields (37 7 %) could also be obtained by properly controlling the contents of the three dopants [49]. 

Huang CH, Chen TM (2010) Ca9La(P04)7 Eu Mn " an emission-tunable phosphor through efficient energy transfer for white light-emitting diodes. Opt Exp 18 5089-5099... 

Chattopadhyay S, Bohn PW (2004) Direct-write patterning of microstructured porous silicon arrays by focused-ion-beam Pt deposition and metal-assisted electroless etching. J Appl Phys 96 6888 Chattopadhyay S, Bohn PW (2006) Surfactant-induced modulation of light emission in porous silicon produced by metal-assisted electroless etching. Anal Chem 78(17) 6058-6064 Chattopadhyay S, Li X, Bohn PW (2002) In-plane control of morphology and tunable photoluminescence in porous silicon produced by metal-assisted electroless chemical etching. J Appl Phys 91 6134-6140... 

The size of a quantum dot is important for the tunable light emission characteristic. A small quantum dot, such as a colloidal semiconductor nanocrystal, can be as small as 2 to 10 nm [6]. A self-assembled quantum dot is typically between 10 and 50 nm in size [7]. A quantum dot defined by lithographically patterned gate electrodes or by etching on two-dimensional electron gases in semiconductor heterostructures can have lateral dimensions exceeding 100 nm [8]. 

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