High-efficiency room temperature phosphorescence from amorphous metal-free copolymers

2016 ◽  
Vol 60 (2) ◽  
pp. 163-164 ◽  
Author(s):  
Dongpeng Yan
Keyword(s):  
Room Temperature ◽  
High Efficiency ◽  
Amorphous Metal ◽  
Room Temperature Phosphorescence ◽  
Metal Free

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 Metal free room temperature phosphorescence from molecular self-interactions in the solid state

2018 ◽  
Vol 6 (17) ◽  
pp. 4603-4626 ◽  
Author(s):  
Alessandra Forni ◽  
Elena Lucenti ◽  
Chiara Botta ◽  
Elena Cariati
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Organic Materials ◽  
Environmental Load ◽  
Room Temperature Phosphorescence ◽  
Metal Free ◽  
Low Toxicity

Purely organic materials showing solid state room temperature phosphorescence (RTP) are receiving an ever growing interest due to their low toxicity, cost and environmental load compared to their organometallic counterparts.

Room‐Temperature Phosphorescence in Metal‐Free Organic Materials

2019 ◽  
Vol 531 (7) ◽  
pp. 1800482 ◽  
Author(s):  
Huili Ma ◽  
Anqi Lv ◽  
Lishun Fu ◽  
Shan Wang ◽  
Zhongfu An ◽  
...  
Keyword(s):  
Room Temperature ◽  
Organic Materials ◽  
Room Temperature Phosphorescence ◽  
Metal Free

Mechanoresponsive turn-on phosphorescence by a desymmetrization approach

2020 ◽  
Vol 56 (50) ◽  
pp. 6810-6813
Author(s):  
Yosuke Tani ◽  
Mao Komura ◽  
Takuji Ogawa
Keyword(s):  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Metal Free ◽  
Turn On

Mechanoresponsive turn-on of room-temperature phosphorescence of a metal-free organic 1,2-diketone is reported. Desymmetrization selectively modifies the emission of the crystal.

scholarly journals Suppressing molecular motions for enhanced room-temperature phosphorescence of metal-free organic materials

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Min Sang Kwon ◽  
Youngchang Yu ◽  
Caleb Coburn ◽  
Andrew W. Phillips ◽  
Kyeongwoon Chung ◽  
...  
Keyword(s):  
Room Temperature ◽  
Organic Materials ◽  
Molecular Motions ◽  
Room Temperature Phosphorescence ◽  
Metal Free
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