Designing optically pumped InGaN quantum wells with long wavelength emission for a phosphor-free device with polarized white-light emission

2016 ◽  
Author(s):  
Stacy J. Kowsz ◽  
Christopher D. Pynn ◽  
Feng Wu ◽  
Robert M. Farrell ◽  
James S. Speck ◽  
...  
Keyword(s):  
Quantum Wells ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Optically Pumped ◽  
Long Wavelength ◽  
Wavelength Emission ◽  
Ingan Quantum Wells

Demonstration of phosphor-free polarized white light emission from monolithically integrated semipolar InGaN quantum wells

2015 ◽  
Vol 107 (10) ◽  
pp. 101104 ◽  
Author(s):  
S. J. Kowsz ◽  
C. D. Pynn ◽  
S. H. Oh ◽  
R. M. Farrell ◽  
J. S. Speck ◽  
...  
Keyword(s):  
Quantum Wells ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Monolithically Integrated ◽  
Ingan Quantum Wells

Tunable luminescence and white light emission of porphyrin-zinc coordination assemblies

2018 ◽  
Vol 22 (09n10) ◽  
pp. 821-830 ◽  
Author(s):  
Zheng Wang ◽  
Jian-Hua Zhang ◽  
Cheng-Yi Zhu ◽  
Shao-Yun Yin ◽  
Mei Pan
Keyword(s):  
White Light ◽  
Light Emission ◽  
Three Dimensional ◽  
White Light Emission ◽  
Molar Ratio ◽  
Excitation Wavelength ◽  
Temperature Dependent ◽  
Long Wavelength ◽  
Linear Formula ◽  
Zinc Coordination

Bipodal ligand 5,15-bis(4-carboxyphenyl) porphyrin (H[Formula: see text]DCPP) was designed and synthesized. By adjusting the molar ratio of H[Formula: see text]DCPP, ancillary ligand 4,4-bipyridine (bpy) and zinc acetate salts, three novel coordination assemblies, namely, zero-dimensional dimeric [Zn[Formula: see text](H[Formula: see text]DCPP)[Formula: see text] ·bpy] ·4H[Formula: see text]O ·4DMF (Zn-D), two-dimensional polymeric {[Zn[Formula: see text](DCPP) ·bpy[Formula: see text] ·H[Formula: see text]O ·DMF[Formula: see text]] ·solvent}[Formula: see text] (Zn-2D), and three-dimensional polymeric [Zn[Formula: see text](DCPP) ·bpy[Formula: see text]][Formula: see text] (Zn-3D) were assembled. Due to the delicate integration of multiple chromophores in the coordination space combining bpy, DCPP and MLCT emissions together, photoluminescence (PL) of the three porphyrin-zinc coordination assemblies differ from each other and color tone is tunable from blue to orange with changes of the excitation wavelength. In particular, white light emission (WLE) can be observed by the excitation of 270 to 290 nm, representing the first examples of single component WLE compounds based on porphyrin ligands. Furthermore, temperature-dependent luminescence results in a linear [Formula: see text]–[Formula: see text] relationship in Zn-2D and Zn-3D assemblies, applicable for long wavelength red-emitting thermometers.

scholarly journals Secondary Through-Space Interactions: Achieving Single-Molecule White-Light Emission from Clusteroluminogens with Isolated Phenyl Rings

2022 ◽  
Author(s):  
Jianyu Zhang ◽  
Parvej Alam ◽  
Siwei Zhang ◽  
Hanchen Shen ◽  
Lianrui Hu ◽  
...  
Keyword(s):  
Single Molecule ◽  
White Light ◽  
Light Emission ◽  
Photophysical Properties ◽  
White Light Emission ◽  
Excitation Wavelength ◽  
Conjugated Molecules ◽  
Long Wavelength ◽  
Phenyl Rings ◽  
Donor Acceptor

Clusteroluminogens (CLgens) refer to some non-conjugated molecules that show visible light due to the formation of aggregates and unique electronic properties with through-space interactions (TSI). Although mature and systematic theories of molecular photophysics have been developed to study conventional conjugated chromophores, it is still challenging to endow CLgens with designed photophysical properties by manipulating TSI. Herein, three CLgens with non-conjugated donor-acceptor structures and different halide substituents with secondary TSI are designed and synthesized. These molecules show multiple emissions and even white-light emission in the crystalline state and the intensity ratio of these multiple emission peaks is easily manipulated by changing the halide atom and excitation wavelength. Experimental and theoretical results successfully disclose the electronic nature of these multiple emissions: through-space conjugation for short-wavelength fluorescence, through-space charge transfer based on secondary TSI for long-wavelength fluorescence, and room-temperature phosphorescence. The introduction of secondary TSI to CLgens not only enriches their varieties of photophysical properties but also inspires the establishment of novel aggregate photophysics for clusteroluminescence.

Stacking faults and interface roughening in semipolar (202¯1¯) single InGaN quantum wells for long wavelength emission

2014 ◽  
Vol 104 (15) ◽  
pp. 151901 ◽  
Author(s):  
Feng Wu ◽  
Yuji Zhao ◽  
Alexey Romanov ◽  
Steven P. DenBaars ◽  
Shuji Nakamura ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Stacking Faults ◽  
Long Wavelength ◽  
Wavelength Emission ◽  
Interface Roughening ◽  
Ingan Quantum Wells

A Novel Way to Prepare Silicon Oxide Nanomaterials with White Light Emission by Reactive Ladder Polyhydrosilsesquioxane

2012 ◽  
Vol 1 (1) ◽  
pp. 76-80
Author(s):  
Zhongjie Ren ◽  
Rongben Zhang ◽  
Fengwen Yan ◽  
Shidong Jiang ◽  
Feng Wang ◽  
...  
Keyword(s):  
White Light ◽  
Silicon Oxide ◽  
Light Emission ◽  
White Light Emission

Lead chlorine cluster assembled one-dimensional halide with highly efficient broadband white-light emission

2021 ◽  
Author(s):  
Jian-Qiang Zhao ◽  
Chen Sun ◽  
Meng Yue ◽  
Yan Meng ◽  
Xian-Mei Zhao ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
One Dimensional ◽  
Highly Efficient

One new lead chlorine cluster assembled 1D non-perovskite halide of [DTHPE]2Pb3Cl10 was synthesized which displays strong broadband bluish white light emission with a high photoluminescence quantum efficiency of 19.45% exceeding those of previously reported 2D lead perovskites.

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