scholarly journals Phosphorescence: Photoreversible On-Off Recording of Persistent Room-Temperature Phosphorescence (Advanced Optical Materials 12/2015)

2015 ◽  
Vol 3 (12) ◽  
pp. 1802-1802
Author(s):  
Yuki Katsurada ◽  
Shuzo Hirata ◽  
Kenro Totani ◽  
Toshiyuki Watanabe ◽  
Martin Vacha
Keyword(s):  
Optical Materials ◽  
Room Temperature ◽  
Room Temperature Phosphorescence

Thermal Recording: Reversible Thermal Recording Media Using Time-Dependent Persistent Room Temperature Phosphorescence (Advanced Optical Materials 6/2013)

2013 ◽  
Vol 1 (6) ◽  
pp. 411-411
Author(s):  
Shuzo Hirata ◽  
Kenro Totani ◽  
Hironori Kaji ◽  
Martin Vacha ◽  
Toshiyuki Watanabe ◽  
...  
Keyword(s):  
Optical Materials ◽  
Room Temperature ◽  
Time Dependent ◽  
Recording Media ◽  
Room Temperature Phosphorescence

scholarly journals Photo-induced Ultralong Phosphorescence of Carbon Dots for Thermal-sensitive Dynamic Patterning

2021 ◽  
Author(s):  
Yanfeng Liu ◽  
Xin Huang ◽  
Zuoji Niu ◽  
Dongni Wang ◽  
Huilin Gou ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Optical Materials ◽  
Room Temperature ◽  
Stimuli Responsive ◽  
Room Temperature Phosphorescence ◽  
Long Afterglow

Stimuli-responsive films with dynamic long afterglow feature have received considerable attention in the field of optical materials. Herein, we report the unique dynamic ultralong room temperature phosphorescence (URTP) in flexible...

Dual-Functional Porous MOFs with Hierarchical Guest Encapsulation for Room-Temperature Phosphorescence and White-Light-Emitting

Nanoscale ◽  
2021 ◽  
Author(s):  
Jiangyan Yuan ◽  
Guangyuan Feng ◽  
Jie Dong ◽  
Sheng-Bin Lei ◽  
Wenping Hu
Keyword(s):  
White Light ◽  
Optical Materials ◽  
Room Temperature ◽  
Metal Organic Framework ◽  
Porous Metal ◽  
Room Temperature Phosphorescence ◽  
Light Emitting ◽  
Dual Functional ◽  
Metal Organic ◽  
White Light Emitting Diodes

The development of optical materials with room temperature phosphorescence (RTP) and white light-emitting diodes (WLEDs) is highly desirable and remains a challenging task. Herein, a porous Metal-organic framework PCN-921 with...

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>

scholarly journals Tipping the Balance with the Aid of Stoichiometry: Room Temperature Phosphorescence versus Fluorescence in Organic Cocrystals

2015 ◽  
Vol 15 (4) ◽  
pp. 2039-2045 ◽  
Author(s):  
Simone d’Agostino ◽  
Fabrizia Grepioni ◽  
Dario Braga ◽  
Barbara Ventura
Keyword(s):  
Room Temperature ◽  
Room Temperature Phosphorescence
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