scholarly journals On the origins of the green luminescence in the “zero-dimensional perovskite” Cs4PbBr6: conclusive results from cathodoluminescence imaging

Nanoscale ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 3925-3932 ◽  
Author(s):  
Nicolas Riesen ◽  
Mark Lockrey ◽  
Kate Badek ◽  
Hans Riesen
Keyword(s):  
Green Emission ◽  
Green Luminescence ◽  
Bright Green ◽  
Cathodoluminescence Imaging

Cathodoluminescence imaging reveals that the bright green emission from the zero-dimensional perovskite Cs4PbBr6 is due to nanoscale CsPbBr3 impurities.

Ho-doped SrBi2 Nb2 O9 multifunctional ceramics with bright green emission and good electrical properties

2017 ◽  
Vol 214 (10) ◽  
pp. 1700276 ◽  
Author(s):  
Lei Yu ◽  
Jigong Hao ◽  
Zhijun Xu ◽  
Wei Li ◽  
Ruiqing Chu
Keyword(s):  
Electrical Properties ◽  
Green Emission ◽  
Bright Green

Highly Efficient Multifunctional Phosphorescent Dendrimers Consisting of an Iridium-Complex Core and Charge-Transporting Dendrons for Organic Light-Emitting Devices

2005 ◽  
Vol 871 ◽  
Author(s):  
Toshimitsu Tsuzuki ◽  
Nobuhiko Shirasawa ◽  
Toshiyasu Suzuki ◽  
Shizuo Tokito
Keyword(s):  
First Generation ◽  
Green Emission ◽  
Iridium Complex ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Hole Transporting ◽  
Complex Core ◽  
Bright Green ◽  
Organic Light Emitting Devices

AbstractWe report a novel class of emitting materials for use in the organic light-emitting devices (OLEDs): multifunctional phosphorescent dendrimers that have a phosphorescent core and have charge transporting dendrons. We have synthesized first-generation and second-generation dendrimers consisting of a fac-tris(2-phenylpyridine)iridium [Ir(ppy)3] core and hole transporting phenylcarbazole-based dendrons. Smooth amorphous films of these dendrimers were formed by spin-coating them from solutions. The OLEDs using the dendrimer exhibited bright green or yellowish-green emission from the Ir(ppy)3 core. The external quantum efficiency of the OLED using the mixture film of the first-generation dendrimer and an electron-transporting material was as high as 7.6%.

Application of three-coordinate copper(i) complexes with halide ligands in organic light-emitting diodes that exhibit delayed fluorescence

2015 ◽  
Vol 44 (18) ◽  
pp. 8369-8378 ◽  
Author(s):  
Masahisa Osawa ◽  
Mikio Hoshino ◽  
Masashi Hashimoto ◽  
Isao Kawata ◽  
Satoshi Igawa ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Layered Structures ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Green Luminescence ◽  
Light Emitting ◽  
Organic Light ◽  
Bright Green ◽  
Halide Ligands

Conventional bottom-emitting devices with three-layered structures containing sublimable three-coordinate copper(i) complexes produce bright green luminescence with maximum external quantum efficiencies (EQE) of 18.6–22.5%.

The Luminescence Properties of BaGd2(MoO4)4: Eu3+, Er3+, Yb3+ Phosphors

2010 ◽  
Vol 663-665 ◽  
pp. 137-140 ◽  
Author(s):  
Jia Yue Sun ◽  
Wei Hang Zhang ◽  
Yu Jing Lan ◽  
Hai Yan Du
Keyword(s):  
Red Light ◽  
Green Light ◽  
Green Emission ◽  
Infrared Light ◽  
Solid State Method ◽  
Light Excitation ◽  
Bright Green ◽  
State Method ◽  
Uv Excitation ◽  
Color Emission

Two-color emission phosphors BaGd2(MoO4)4: Eu3+, Er3+, Yb3+ have been synthesized by the high temperature solid-state method. The as-prepared BaGd2(MoO4)4: Eu3+, Er3+, Yb3+ phosphors can emit intense red light under 395 nm UV excitation, while it will show bright green light upon 980 nm infrared light excitation. It is found that the red emission peaks at 595 and 614 nm should be attributed to 5D0-7F1 and 5D0-7F2 transitions of Eu3+, respectively. The green emission peaks centered at 532 and 553 nm under 980 nm excitation, are attributed to Er3+ transitions from 4H11/2 -4I15/2 and 4S3/2-4I15/2, respectively.

Light harvesting indolyl-substituted phosphoramide ligand for the enhancement of Mn(ii) luminescence

2020 ◽  
Vol 49 (22) ◽  
pp. 7525-7534 ◽  
Author(s):  
Marco Bortoluzzi ◽  
Jesús Castro ◽  
Alberto Gobbo ◽  
Valentina Ferraro ◽  
Luca Pietrobon
Keyword(s):  
General Formula ◽  
Light Harvesting ◽  
Green Luminescence ◽  
Bright Green ◽  
Tetrahedral Complexes

Excitation of the coordinated ligands in tetrahedral complexes having the general formula [MnX2L2] (X = Cl, Br, I; L = N,N′,N′-tetramethyl-P-indol-1-ylphosphonic diamide) causes bright green luminescence from the Mn(ii) centre.

Experimental and theoretical approach to account for green luminescence from Gd2Zr2O7 pyrochlore: exploring the site occupancy and origin of host-dopant energy transfer in Gd2Zr2O7:Eu3+

RSC Advances ◽  
2016 ◽  
Vol 6 (50) ◽  
pp. 44908-44920 ◽  
Author(s):  
Santosh K. Gupta ◽  
P. S. Ghosh ◽  
C. Reghukumar ◽  
N. Pathak ◽  
R. M. Kadam
Keyword(s):  
Energy Transfer ◽  
Dft Calculations ◽  
Theoretical Approach ◽  
Site Occupancy ◽  
Green Emission ◽  
Green Luminescence ◽  
Local Site

Origin of green emission in undoped Gd2Zr2O7 and photophysical characteristics such as local site and energy transfer dynamics of Gd2Zr2O7:Eu3+ is investigated using PL and DFT calculations.

scholarly journals Manganese(II) in Tetrahedral Halide Environment: Factors Governing Bright Green Luminescence

2019 ◽  
Vol 31 (24) ◽  
pp. 10161-10169 ◽  
Author(s):  
Viktoriia Morad ◽  
Ihor Cherniukh ◽  
Lena Pöttschacher ◽  
Yevhen Shynkarenko ◽  
Sergii Yakunin ◽  
...  
Keyword(s):  
Green Luminescence ◽  
Environment Factors ◽  
Bright Green

scholarly journals Ultrafast Carrier Dynamics and Recombination in Green Emitting InGaN MQW LED

2006 ◽  
Vol 916 ◽  
Author(s):  
Alexander N. Cartwright ◽  
M. C-K. Cheung ◽  
F. Shahedipour-Sandvik ◽  
J. R. Grandusky ◽  
M. Jamil ◽  
...  
Keyword(s):  
Defect Density ◽  
Optical Transition ◽  
Effective Means ◽  
Green Emission ◽  
Layer Growth ◽  
Layer By Layer ◽  
Green Luminescence ◽  
Time Resolved ◽  
Photoluminescence Decay ◽  
Time Resolved Photoluminescence

AbstractTime-resolved photoluminescence studies can provide useful information for the development of InGaN/GaN heterostructures for long wavelength visible emitters. In this paper, we present results of time-resolved photoluminescence from samples grown using two different approaches to achieve green emission from InGaN/GaN MQWs. In one approach, samples, with high indium incorporation, were grown on a high quality AlN substrate to achieve green emission. The resulting photoluminescence decay of the green luminescence is long-lived and non-exponential. Quantitative analysis showed that the decay has a stretched-exponential characteristic, typical of InGaN/GaN MQW with potential fluctuation along the growth plane. This carrier localization, in a structure with low defect density, proves to be an effective means to achieve green emission. In another approach, a piezoelectric Stark-like ladder effect is used. In this case, a methodical layer-by-layer growth homogeneity optimization process was adopted to achieve an optical transition below the electron to heavy-hole (e1hh1) transition when the quantum well is subjected to the strong piezoelectric polarization dipole. This approach has proven to be successful in achieving green luminescence on conventional sapphire substrates. The resulting photoluminescence decay at 14 K, of a sample grown by this approach, is single exponential and shorter in duration than the decay observed in the first approach. This exponential decay is consistent with previous AFM studies that revealed a homogeneous active region.

scholarly journals Bright green emission from the Mn^2+-doped zinc gallogermanate phosphors

2013 ◽  
Vol 3 (10) ◽  
pp. 1727 ◽  
Author(s):  
Xiaoqing Xu ◽  
Jing Ren ◽  
Guorong Chen ◽  
Deshuang Kong ◽  
Changjun Gu ◽  
...  
Keyword(s):  
Green Emission ◽  
Bright Green
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