Enhancing the phosphorescence of hybrid metal halides through molecular sensitization

2019 ◽  
Vol 7 (32) ◽  
pp. 9803-9807 ◽  
Author(s):  
Liao-Kuo Gong ◽  
Jian-Rong Li ◽  
Zhao-Feng Wu ◽  
Bing Hu ◽  
Ze-Ping Wang ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Room Temperature ◽  
Metal Halides ◽  
Room Temperature Phosphorescence

The room-temperature phosphorescence quantum efficiency of [BPy]6[Pb3Br12] has been improved by a maximum of fourteen-fold through sensitization of thiadiazole-based molecules.

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...

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.

Ligand Control of Room-Temperature Phosphorescence Violating Kasha’s Rule in Hybrid Organic–Inorganic Metal Halides

2020 ◽  
Vol 32 (4) ◽  
pp. 1454-1460 ◽  
Author(s):  
Li-Li Zhu ◽  
Yue-E Huang ◽  
Liao-Kuo Gong ◽  
Xiao-Ying Huang ◽  
Xing-Hui Qi ◽  
...  
Keyword(s):  
Room Temperature ◽  
Metal Halides ◽  
Room Temperature Phosphorescence

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...

Achieving high-efficiency purely organic room-temperature phosphorescence materials by boronic ester substitution of phenoxathiine

2019 ◽  
Vol 55 (50) ◽  
pp. 7215-7218 ◽  
Author(s):  
Mengke Li ◽  
Xinyi Cai ◽  
Zhenyang Qiao ◽  
Kunkun Liu ◽  
Wentao Xie ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Room Temperature ◽  
High Efficiency ◽  
Room Temperature Phosphorescence ◽  
Boronic Ester

The effect of boronic ester substitution on the room-temperature phosphorescence of phenoxathiine-based derivatives was investigated to achieve an improved phosphorescence quantum efficiency of up to 20%.

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.

Room-temperature phosphorescence of manganese-based metal halides

2021 ◽  
Author(s):  
Yue Zhang ◽  
Dian Chen ◽  
Kai-Hang Jin ◽  
Shuang-Quan Zang ◽  
Qing-Lun Wang
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Metal Halides ◽  
Room Temperature Phosphorescence ◽  
Light Emitting ◽  
High Solid ◽  
Emission Efficiency ◽  
Organic Light

Room-temperature phosphorescence (RTP) materials can be used in anti-counterfeiting, organic light-emitting diodes and displays. However, designing RTP materials with long luminescence lifetime and high solid-state emission efficiency is still a...

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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