scholarly journals Tailored Fabrication of Carbon Dot Composites with Full‐Color Ultralong Room‐Temperature Phosphorescence for Multidimensional Encryption

2021 ◽  
pp. 2103833
Author(s):  
Yuanfei Ding ◽  
Xueliang Wang ◽  
Miao Tang ◽  
Huibin Qiu
Keyword(s):  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Carbon Dot ◽  
Full Color

Aggregation-Induced Room-Temperature Phosphorescence Obtained from Water-Dispersible Carbon Dot-Based Composite Materials

2020 ◽  
Vol 12 (9) ◽  
pp. 10791-10800 ◽  
Author(s):  
Chan Wang ◽  
Yueyue Chen ◽  
Yalan Xu ◽  
Guoxia Ran ◽  
Yimin He ◽  
...  
Keyword(s):  
Composite Materials ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Carbon Dot ◽  
Water Dispersible

Efficient long lifetime room temperature phosphorescence of carbon dots in a potash alum matrix

2015 ◽  
Vol 3 (12) ◽  
pp. 2798-2801 ◽  
Author(s):  
Xinwei Dong ◽  
Liangming Wei ◽  
Yanjie Su ◽  
Zhongli Li ◽  
Huijuan Geng ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Composite Powders ◽  
Carbon Dot ◽  
Long Lifetime

Carbon dot composite powders show long phosphorescence lifetimes when the carbon dots are dispersed into a potash alum matrix.

Ultralong-lived room temperature phosphorescence from N and P codoped self-protective carbonized polymer dots for confidential information encryption and decryption

2021 ◽  
Vol 9 (14) ◽  
pp. 4847-4853
Author(s):  
Zifei Wang ◽  
Jian Shen ◽  
Jiazhen Sun ◽  
Bin Xu ◽  
Zhenhua Gao ◽  
...  
Keyword(s):  
Information Security ◽  
Decay Time ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Confidential Information ◽  
Carbon Dot ◽  
Polymer Dots ◽  
Encryption And Decryption

N and P codoped carbonized polymer dots (NP-CPDs) exhibit a relatively long RTP decay time over 23 s among most carbon dot-based RTP materials reported thus far. Such NP-CPDs are applied to illustrate applications in information security.

scholarly journals Metal-free 2D layered organic ammonium halide framework realizing full-color persistent room-temperature phosphorescence

2021 ◽  
Author(s):  
Shangwei Feng ◽  
Qiuqin Huang ◽  
Shuming Yang ◽  
Zhenghuan Lin ◽  
Qidan Ling
Keyword(s):  
Electronic Structure ◽  
Room Temperature ◽  
Heavy Atom ◽  
Metal Halides ◽  
Room Temperature Phosphorescence ◽  
Nano Structure ◽  
Inorganic Hybrid ◽  
Metal Free ◽  
Full Color ◽  
Atom Effect

Organic-inorganic hybrid metal halides have attracted intensive attention because of their unique electronic structure and solution processability. They have rigid micro/nano structure and heavy atom effect, which has obvious advantages...

Highly Efficient Carbon Dots Based Room-Temperature Fluorescence–Phosphorescence Dual Emitter

2021 ◽  
Author(s):  
Biao Zhao ◽  
Runnan Yu ◽  
Kunxiang Xu ◽  
Chao Zou ◽  
Huanyu Ma ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Carbon Dot ◽  
Highly Efficient ◽  
Huge Challenge

Carbon dot (CD)-based room temperature phosphorescence nanomaterials are currently drawing enormous attention. However, constructing fluorescence–phosphorescence dual emissive CDs (FP-CDs) is still a huge challenge due to the limited preparation strategies....

Tunable Full-color Room Temperature Phosphorescence of Two Single-Component Zinc(II) Complexes

2021 ◽  
Author(s):  
Ying Mu ◽  
Zhongxin Liu ◽  
Xiaoyu Fang ◽  
Song-De Han ◽  
Jie Pan ◽  
...  
Keyword(s):  
Room Temperature ◽  
Heavy Atom ◽  
Photoluminescence Property ◽  
Single Component ◽  
Ambient Conditions ◽  
Room Temperature Phosphorescence ◽  
Full Color ◽  
Color Displays ◽  
Organic Complexes ◽  
Yellow Orange

Abstract Tunable full-color room temperature phosphorescence (RTP) is charming due to its potentials in multiple anti-counterfeitings, all-color displays, and multichannel biomarkers. However, it is a huge challenge to acquire excitation-dependent continuously adjustable full-color RTP from a single-component compound. Herein, we report two Zn(II)−based organic complexes, which are the first examples that present blue, cyan, green, yellow, orange, and red continuously tunable phosphorescence with decent quantum efficiency in response to variation of excitation energy at ambient conditions. The unique photoluminescence property is induced by multiple triplet decay pathways, i.e. 3ligand-centered* and 3charge transfer*. The population and stabilization of the triplet excitons benefit from heavy atom effect of Br ions and restriction of molecular motion due to crystallization. This work contributes an insight for the construction of full-color RTP materials and endows Zn(II)−based organic complexes with fresh features for extensive applications.

Room temperature phosphorescence from moisture-resistant and oxygen-barred carbon dot aggregates

2017 ◽  
Vol 5 (25) ◽  
pp. 6243-6250 ◽  
Author(s):  
Yonghao Chen ◽  
Jiangling He ◽  
Chaofan Hu ◽  
Haoran Zhang ◽  
Bingfu Lei ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Carbon Dot ◽  
Moisture Resistant

Aggregation-induced room temperature phosphorescence of carbon dots was first found and the relevant mechanism was investigated.

scholarly journals Multilevel Data Encryption Using Thermal-Treatment Controlled Room Temperature Phosphorescence of Carbon Dot/Polyvinylalcohol Composites

2018 ◽  
Vol 5 (9) ◽  
pp. 1800795 ◽  
Author(s):  
Zhen Tian ◽  
Di Li ◽  
Elena V. Ushakova ◽  
Vladimir G. Maslov ◽  
Ding Zhou ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Room Temperature ◽  
Data Encryption ◽  
Multilevel Data ◽  
Room Temperature Phosphorescence ◽  
Carbon Dot

DNA Inspirited Rational Construction of Nonconventional Luminophores with Efficient and Color-Tunable Afterglow

2020 ◽  
Author(s):  
Yunzhong Wang ◽  
Saixing Tang ◽  
Yating Wen ◽  
Shuyuan Zheng ◽  
Bing Yang ◽  
...  
Keyword(s):  
Rational Design ◽  
Room Temperature ◽  
Double Helix ◽  
Mechanical Grinding ◽  
Room Temperature Phosphorescence ◽  
Color Tunable ◽  
Potential Applications ◽  
Rational Construction ◽  
Double Helix Structure ◽  
Made In

<div>Persistent room-temperature phosphorescence (p-RTP) from pure organics is attractive </div><div>due to its fundamental importance and potential applications in molecular imaging, </div><div>sensing, encryption, anticounterfeiting, etc.1-4 Recently, efforts have been also made in </div><div>obtaining color-tunable p-RTP in aromatic phosphors5 and nonconjugated polymers6,7. </div><div>The origin of color-tunable p-RTP and the rational design of such luminogens, </div><div>particularly those with explicit structure and molecular packing, remain challenging. </div><div>Noteworthily, nonconventional luminophores without significant conjugations generally </div><div>possess excitation-dependent photoluminescence (PL) because of the coexistence of </div><div>diverse clustered chromophores6,8, which strongly implicates the possibility to achieve </div><div>color-tunable p-RTP from their molecular crystals assisted by effective intermolecular </div><div>interactions. Here, inspirited by the highly stable double-helix structure and multiple </div><div>hydrogen bonds in DNA, we reported a series of nonconventional luminophores based on </div><div>hydantoin (HA), which demonstrate excitation-dependent PL and color-tunable p-RTP </div><div>from sky-blue to yellowish-green, accompanying unprecedentedly high PL and p-RTP </div><div>efficiencies of up to 87.5% and 21.8%, respectively. Meanwhile, the p-RTP emissions are </div><div>resistant to vigorous mechanical grinding, with lifetimes of up to 1.74 s. Such robust, </div><div>color-tunable and highly efficient p-RTP render the luminophores promising for varying </div><div>applications. These findings provide mechanism insights into the origin of color-tunable </div><div>p-RTP, and surely advance the exploitation of efficient nonconventional luminophores.</div>

Clustering-Triggered Efficient Room Temperature Phosphorescence from Nonconventional Luminophores

2019 ◽  
Author(s):  
Shuyuan Zheng ◽  
Taiping Hu ◽  
Xin Bin ◽  
Yunzhong Wang ◽  
Yuanping Yi ◽  
...  
Keyword(s):  
Room Temperature ◽  
High Efficiency ◽  
Spin Orbit Coupling ◽  
Design Rationale ◽  
Emission Mechanism ◽  
Room Temperature Phosphorescence ◽  
Electronic Interactions ◽  
Energy Gaps ◽  
Theoretical Results

Pure organic room temperature phosphorescence (RTP) and luminescence from nonconventional luminophores have gained increasing attention. However, it remains challenging to achieve efficient RTP from unorthodox luminophores, on account of the unsophisticated understanding of the emission mechanism. Here we propose a strategy to realize efficient RTP in nonconventional luminophores through incorporation of lone pairs together with clustering and effective electronic interactions. The former promotes spin-orbit coupling and boost the consequent intersystem crossing, whereas the latter narrows energy gaps and stabilizes the triplets, thus synergistically affording remarkable RTP. Experimental and theoretical results of urea and its derivatives verify the design rationale. Remarkably, RTP from thiourea solids with unprecedentedly high efficiency of up to 24.5% is obtained. Further control experiments testify the crucial role of through-space delocalization on the emission. These results would spur the future fabrication of nonconventional phosphors, and moreover should advance understanding of the underlying emission mechanism.<br>

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