Excited‐State Modulation for Controlling Fluorescence and Phosphorescence Pathways toward White‐Light Emission

2019 ◽  
Vol 7 (20) ◽  
pp. 1900767 ◽  
Author(s):  
Changfu Feng ◽  
Shuai Li ◽  
Xiaoxiao Xiao ◽  
Yilong Lei ◽  
Hua Geng ◽  
...  
Keyword(s):  
Excited State ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Fluorescence And Phosphorescence

Mechanically induced single-molecule white-light emission of excited-state intramolecular proton transfer (ESIPT) materials

2021 ◽  
Author(s):  
Quan Huang ◽  
Qiang Guo ◽  
Jingbo Lan ◽  
Rongchuan Su ◽  
You Ran ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Single Molecule ◽  
White Light ◽  
Light Emission ◽  
Intramolecular Proton Transfer ◽  
White Light Emission ◽  
Mechanical Grinding ◽  
Emission Color ◽  
Color Switching

Disclosed herein is the first example of a mechanically induced single-molecule white-light emission of ESIPT materials. Mechanical grinding transforms intermolecular packing motifs, enabling emission color switching from yellowish green to white.

scholarly journals Manipulation of parity and polarization through structural distortion in light-emitting halide double perovskites

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Tamilselvan Appadurai ◽  
Ravi Kashikar ◽  
Poonam Sikarwar ◽  
Sudhadevi Antharjanam ◽  
Birabar Ranjit Kumar Nanda ◽  
...  
Keyword(s):  
Excited State ◽  
White Light ◽  
Density Functional ◽  
Light Emission ◽  
Density Functional Theory Calculations ◽  
White Light Emission ◽  
Photogenerated Carrier ◽  
Double Perovskites ◽  
Light Emitting ◽  
Excited State Lifetimes

AbstractHalide perovskite materials recently attracted wide attention for light-emitting applications. The intense white light emission and excited state lifetimes greater than 1 μs are the hallmarks of a good light-emitting material. Here, we provide a clear design strategy to achieve both of these aforementioned properties in a single material via the introduction of octahedral asymmetry in halide double perovskites Cs2AgMCl6 through iso-trivalent substitution at the M site. In the substituted Cs2AgMCl6, the presence of mixed M3+ sites distorts the [AgCl6]5- octahedra, affecting the parity of the valence and conduction band edges and thereby altering the optical transitions. The distortion also creates a local polarization that leads to an effective photogenerated carrier separation. Considering perovskite series with three M3+ cations, namely Bi3+, In3+ and Sb3+, the mixed trivalent cationic compounds with specific ratios of In3+ and Bi3+ show white light emission with intensity nearly 150 times larger than that of the parent compounds, and are characterised by excited state lifetimes nearing 1 μs. Using single crystal X-ray diffraction, far-infrared absorption, steady-state and time-resolved photoluminescence, bias-dependent photoluminescence, P-E loop traces and density-functional theory calculations, we hence demonstrate the role of octahedral distortion in enhancing white light emission and excited state lifetimes of halide double perovskites.

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.

scholarly journals Clustering‐Induced White Light Emission from Carbonized Polymer Dots

2021 ◽  
Vol 2 (5) ◽  
pp. 2170016
Author(s):  
Bin Liu ◽  
Zheng Chen ◽  
Bo Chu ◽  
Ya-Ling Wang ◽  
Ning Li ◽  
...  
Keyword(s):  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Polymer Dots
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