scholarly journals Highly Efficient Heavy Atom Free Room Temperature Phosphorescence by Host-Guest Doping

2021 ◽  
Vol 9 ◽  
Author(s):  
Jinzhu Cao ◽  
Meng Zhang ◽  
Manjeet Singh ◽  
Zhongfu An ◽  
Lingfei Ji ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Room Temperature ◽  
Heavy Atom ◽  
Molar Ratio ◽  
Ambient Conditions ◽  
Room Temperature Phosphorescence ◽  
Highly Efficient ◽  
Long Lifetime ◽  
Remarkable Progress

Recently, there has been remarkable progress of the host-guest doped pure organic room-temperature phosphorescence (RTP) materials. However, it remains a great challenge to develop highly efficient host-guest doping systems. In this study, we have successfully developed a heavy atom free pure organic molecular doped system (benzophenone-thianthrene, respectively) with efficient RTP through a simple host-guest doping strategy. Furthermore, by optimizing the doping ratios, the host-guest material with a molar ratio of 100:1 presented an efficient RTP emission with 46% quantum efficiency and a long lifetime of up to 9.17 ms under ambient conditions. This work will provide an effective way to design new organic doping systems with RTP.

Siloxy Group-Induced Highly Efficient Room Temperature Phosphorescence with Long Lifetime

2016 ◽  
Vol 120 (21) ◽  
pp. 11631-11639 ◽  
Author(s):  
Masaki Shimizu ◽  
Ryosuke Shigitani ◽  
Masaki Nakatani ◽  
Keiko Kuwabara ◽  
Yusuke Miyake ◽  
...  
Keyword(s):  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Highly Efficient ◽  
Long Lifetime

Highly Efficient Room-Temperature Phosphorescent Materials with a Heavy-Atom Effect of Bromine

2021 ◽  
Author(s):  
You Fu Xia ◽  
duyan qing ◽  
Qian Xiang ◽  
Mark G. Humphrey
Keyword(s):  
Room Temperature ◽  
Organic Molecules ◽  
Heavy Atom ◽  
Room Temperature Phosphorescence ◽  
Heavy Atom Effect ◽  
Highly Efficient ◽  
Atom Effect

Room-temperature phosphorescent (RTP) materials with long luminescence lifetimes have stimulated considerable interest. However, pure organic molecules with persistent room-temperature phosphorescence are still rarely reported. In this work, we study two...

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.

scholarly journals Ultralong lifetime and efficient room temperature phosphorescent carbon dots through multi-confinement structure design

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yuqiong Sun ◽  
Shuting Liu ◽  
Luyi Sun ◽  
Shuangshuang Wu ◽  
Guangqi Hu ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Carbon Dots ◽  
Room Temperature ◽  
Structure Design ◽  
Room Temperature Phosphorescence ◽  
Long Lifetime ◽  
Optical Applications ◽  
Triplet Excited States ◽  
Exceptional Stability ◽  
Harsh Conditions

Abstract Room temperature phosphorescence materials have inspired extensive attention owing to their great potential in optical applications. However, it is hard to achieve a room temperature phosphorescence material with simultaneous long lifetime and high phosphorescence quantum efficiency. Herein, multi-confined carbon dots were designed and fabricated, enabling room temperature phosphorescence material with simultaneous ultralong lifetime, high phosphorescence quantum efficiency, and excellent stability. The multi-confinement by a highly rigid network, stable covalent bonding, and 3D spatial restriction efficiently rigidified the triplet excited states of carbon dots from non-radiative deactivation. The as-designed multi-confined carbon dots exhibit ultralong lifetime of 5.72 s, phosphorescence quantum efficiency of 26.36%, and exceptional stability against strong oxidants, acids and bases, as well as polar solvents. This work provides design principles and a universal strategy to construct metal-free room temperature phosphorescence materials with ultralong lifetime, high phosphorescence quantum efficiency, and high stability for promising applications, especially under harsh conditions.

Boron nitride dots In-situ embedded in a B2O3 matrix with the long lifetime Room-Temperature phosphorescence in dry and wet states

2021 ◽  
Vol 417 ◽  
pp. 129175
Author(s):  
Shenghui Han ◽  
Gang Lian ◽  
Xu Zhang ◽  
Zhaozhen Cao ◽  
Qilong Wang ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Long Lifetime

Long lifetime phosphorescence and X-ray scintillation of chlorobismuthate hybrids incorporating ionic liquid cations

2021 ◽  
Author(s):  
Jian-Ce Jin ◽  
Yang-Peng Lin ◽  
Yi-Heng Wu ◽  
Liaokuo Gong ◽  
Nan-Nan Shen ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
X Ray ◽  
Long Lifetime

Two chlorobismuthate hybrids incorportating ionic liquid cations (ILCs) with second-level room-temperature phosphorescence (RTP) were obtained, namely [Emim]BiCl4(bp2do) (1) and [Emmim]BiCl4(bp2do) (2) (Emim = 1-ethyl-3-methylimidazolium, Emmim = 1-ethyl-2,3-dimethylimidazolium, bp2do = 2,2'-bipyridyl-1,1'-dioxide)....

Pure room temperature phosphorescence emission of organic host-guest doped system with quantum efficiency of 64%

2021 ◽  
Author(s):  
Xiaoqing Liu ◽  
Wenbo Dai ◽  
Qian Junjie ◽  
Yunxiang Lei ◽  
Miaochang Liu ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Halogen Atoms ◽  
System P ◽  
Phosphorescence Emission

A new doped system with pure phosphorescent emission is constructed using four 1-(4-(diphenylamino)phenyl)-2-phenylethan-1-one derivatives containing halogen atoms as the guests and benzophenone as the host. That is, the doped system...

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