Great advance in high Tc for hybrid photoelectric-switch bulk/film coupled with dielectric and blue-white light

2019 ◽  
Vol 7 (32) ◽  
pp. 9840-9849 ◽  
Author(s):  
Ya-Fang Gao ◽  
Tie Zhang ◽  
Wan-Ying Zhang ◽  
Qiong Ye ◽  
Da-Wei Fu
Keyword(s):  
White Light ◽  
Broad Band ◽  
Hybrid Compound ◽  
High Tc ◽  
Light Emitting ◽  
Bulk Film ◽  
Great Advance

The hybrid compound [ASD]2[ZnBr4] demonstrates excellent multi-channel, high Tc of 380 K, super-flexibility and broad-band blue-white light emitting bulk/film.

A New Blue-Emitting Mg2Al4Si5O18:Ce3+ Phosphor for White Light Emitting Diodes

2016 ◽  
Vol 16 (4) ◽  
pp. 3506-3510 ◽  
Author(s):  
Jian Chen ◽  
Hongyun Ma ◽  
Yangai Liu
Keyword(s):  
Thermal Stability ◽  
White Light ◽  
Light Emitting Diodes ◽  
Broad Band ◽  
Blue Emission ◽  
Solid State Reaction Method ◽  
Light Emitting ◽  
Good Thermal Stability ◽  
Near Ultraviolet ◽  
White Light Emitting Diodes

A series of blue-emitting Mg2Al4Si5O18:Ce3+ phosphors were prepared via the conventional high temperature solid-state reaction method. The phase structure, photoluminescence (PL) properties, PL thermal stability, and fluorescence decay curves of the samples were investigated for the first time. Under excitation at 365 nm, the phosphor exhibited a broad band blue emission with peak at 440 nm, which was ascribed to the 4f → 5d transition of Ce3+, and the color coordinate was (0.1602, 0.0849). When the temperature increased to 150 °C, the luminescence intensity of the Mg2Al4Si5O18:0.06Ce3+ phosphor was 55.73% of the initial value at room temperature. The activation energy ΔE was calculated to be 0.25 eV, which proved the good thermal stability of the sample. The energy transfer critical distance between Ce3+ ions in Mg2Al4Si5O18 host were also calculated. The above results indicate that the Mg2Al4Si5O18:Ce3+ is a promising candidate as a blue-emitting near ultraviolet convertible phosphor for application in white light emitting diodes (WLEDs).

Single-composition Al3+-singly doped ZnO phosphors for UV-pumped warm white light emitting diode applications

2021 ◽  
Author(s):  
Do Quang Trung ◽  
Nguyen Van Quang ◽  
Manh Trung Tran ◽  
Du Van Nguyen ◽  
Nguyen Tu ◽  
...  
Keyword(s):  
White Light ◽  
Light Quality ◽  
Light Emitting Diode ◽  
Broad Band ◽  
Visible Spectrum ◽  
Next Generation ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Warm White Light ◽  
Doped Zno

The development of full-visible-spectrum phosphors is essential for next-generation light-emitting devices with better light quality. Herein, we report on a novel broad-band-emitting phosphor based on single-composition Al-doped ZnO phosphor. Under...

Application of compound blue for white OLED

2014 ◽  
Vol 92 (7/8) ◽  
pp. 947-950 ◽  
Author(s):  
T. Zhang ◽  
S.J. He ◽  
D.K. Wang ◽  
N. Jiang ◽  
Z.H. Lu
Keyword(s):  
White Light ◽  
High Efficiency ◽  
Broad Band ◽  
Structure Optimization ◽  
Organic Light Emitting Diodes ◽  
Device Structure ◽  
Light Emitting ◽  
Organic Light ◽  
White Oled ◽  
Triplet Excitons

Used as a blue emitter, fluorescent dye 4,4′-bis(9-ethyl-3-carbazovinylene)-1,1′-biphenyl (BCzVBi) is compounded with Bis[2-(2-hydroxyphenyl)-pyridine]beryllium(Bepp2) to yield high efficiency. When combined with green and red phosphorescent emitting layers, a broad band white light organic light-emitting diodes are obtained and studied. In this device, both singlet and triplet excitons can be harvested to generate white color. Through device structure optimization, a high efficiency of 20.8 cd/A, which corresponds to an external quantum efficiency of 11.3% has been achieved.

Broad band white-light-emitting Y5Si3O12N:Ce3+/Dy3+ oxonitridosilicate phosphors for solid state lighting applications

2021 ◽  
Vol 229 ◽  
pp. 117687
Author(s):  
Sayed Ali Khan ◽  
Noor Zamin Khan ◽  
Ikhtisham Mehmood ◽  
Muhammad Rauf ◽  
Binbin Dong ◽  
...  
Keyword(s):  
Solid State ◽  
White Light ◽  
Broad Band ◽  
Solid State Lighting ◽  
Light Emitting

Host‐Sensitized Continuum‐Broad‐Band White‐Light Emitting Yb 2 O 3 :Er 3+ Phosphor under CW‐NIR Light Absorption

2019 ◽  
Vol 4 (12) ◽  
pp. 3408-3415 ◽  
Author(s):  
Abhishek Kumar Soni ◽  
Surbhi Mathur ◽  
Bheeshma Pratap Singh
Keyword(s):  
White Light ◽  
Light Absorption ◽  
Broad Band ◽  
Light Emitting ◽  
Nir Light

Synthesis and luminescence properties of novel deep red emitting phosphors Li2MgGeO4:Mn4+

2015 ◽  
Vol 08 (04) ◽  
pp. 1550046 ◽  
Author(s):  
Renping Cao ◽  
Dong Ceng ◽  
Xiaoguang Yu ◽  
Siling Guo ◽  
Yufeng Wen ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid State ◽  
White Light ◽  
Doping Concentration ◽  
Broad Band ◽  
Solid State Reaction Method ◽  
Red Phosphor ◽  
Light Emitting ◽  
Reaction Method ◽  
White Light Emitting Diodes

Novel deep red phosphor Li 2 MgGeO 4: Mn 4+ is synthesized by high temperature solid state reaction method in air. The strongest PL band peaking at ~ 671 nm in the range of 600–750 nm is due to the 2E → 4A2 transition of Mn 4+ ion and the PLE spectra shows broad band peaking at ~ 323 within the range 220–550 nm owing to the 4A2 → 4T1 transitions of Mn 4+ ion. The optimum Mn 4+ doping concentration is about 0.4 mol.%. The luminous mechanism is explained by Tanabe–Sugano diagram of Mn 4+ ion. The results indicate that red phosphor Li 2 MgGeO 4: Mn 4+ is a beneficial phosphor for use in white light-emitting-diodes (LEDs).

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