Activating room temperature phosphorescence by organic materials using synergistic effects

2019 ◽  
Vol 7 (2) ◽  
pp. 230-236 ◽  
Author(s):  
Xianggui Kong ◽  
Xinrui Wang ◽  
Huimin Cheng ◽  
Yufei Zhao ◽  
Wenying Shi
Keyword(s):  
Layered Double Hydroxides ◽  
Chemical Bonding ◽  
Room Temperature ◽  
Design Principle ◽  
Synergistic Effects ◽  
Heavy Atom ◽  
Room Temperature Phosphorescence ◽  
Host Matrix ◽  
Double Hydroxides ◽  
Atom Effect

We present a design principle to activate highly efficient organic room temperature phosphorescent (ORTP) of carbon dots (CDs), with layered double hydroxides (LDHs) as the host matrix, that utilizes three synergistic effects,i.e.structural confinement effect, heavy atom effect, and chemical bonding.

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...

scholarly journals Heavy-Atom-Free Room-Temperature Phosphorescent Organic Light-Emitting Diodes Enabled by Excited States Engineering

2020 ◽  
Author(s):  
Heather Higginbotham ◽  
Masato Okazaki ◽  
Piotr de Silva ◽  
Satoshi Minakata ◽  
Youhei Takeda ◽  
...  
Keyword(s):  
Excited States ◽  
Room Temperature ◽  
Light Emitting Diodes ◽  
Heavy Atom ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Room Temperature Phosphorescence ◽  
Host Matrix ◽  
Light Emitting ◽  
Organic Light

Room temperature phosphorescence materials offer great opportunities for applications in optoelectronics, due to their unique photophysical characteristics. However, purely organic emitters that can realize distinct electrophosphorescence are rarely exploited. Herein a new approach for designing heavy-atom-free organic room temperature phosphorescence emitters for organic light-emitting diodes is presented. The subtle tuning of the energy diagrams of singlet and triplet excited states by appropriate choice of host matrix allows tailored emission properties and switching of emission channels between thermally activated delayed fluorescence and room temperature phosphorescence. Moreover, an efficient and heavy-atom-free room temperature phosphorescence organic light-emitting diodes using the developed emitter is realized.

scholarly journals Activating Room-Temperature Phosphorescence of Organic Luminophores via External Heavy-Atom Effect and Rigidity of Ionic Polymer Matrix

2021 ◽  
Author(s):  
Xiang Ma ◽  
Zi-Ang Yan ◽  
Xiaohan Lin ◽  
Siyu Sun ◽  
He Tian
Keyword(s):  
Polymer Matrix ◽  
Room Temperature ◽  
Fluorescent Dyes ◽  
Amorphous Polymer ◽  
Heavy Atom ◽  
General Strategy ◽  
Triplet States ◽  
Room Temperature Phosphorescence ◽  
Heavy Atom Effect ◽  
Atom Effect

Pure organic room-temperature phosphorescence (RTP) materials have attracted wide attention for their easy preparation, low toxicity and applications in professional fields such as bioimaging and anti-counterfeiting. Developing phosphorescent systems with more universality and less difficulty in synthesis has long been the pursuit of materials scientists. By employing polymeric quaternary ammonium salt with an ionic bonding matrix and heavy atoms, commercial fluorescent dyes are directly endowed with phosphorescence emission. In a single amorphous polymer, the external heavy-atom effect generates excited triplet states, which are further stabilized by the rigid polymer matrix. This study proposed a new general strategy to design and develop pure organic RTP materials starting from the vast library of organic dyes without complicated chemical synthesis.

Boosting the Heavy Atom Effect by Cavitand Encapsulation: Room Temperature Phosphorescence of Pyrene in the Presence of Oxygen

2018 ◽  
Vol 122 (32) ◽  
pp. 6578-6584 ◽  
Author(s):  
Connor J. Easley ◽  
Magi Mettry ◽  
Emily M. Moses ◽  
Richard J. Hooley ◽  
Christopher J. Bardeen
Keyword(s):  
Room Temperature ◽  
Heavy Atom ◽  
Room Temperature Phosphorescence ◽  
Heavy Atom Effect ◽  
Atom Effect

scholarly journals Revealing Internal Heavy Chalcogen Atom Effect on the Photophysics of Dibenzo[a,j]phenazine-Cored Donor–Acceptor–Donor Triad

2021 ◽  
Author(s):  
Shimpei Goto ◽  
Yuya Nitta ◽  
Nicolas Decarli ◽  
Leonardo Evaristo de Sousa ◽  
Patrycja Stachelek ◽  
...  
Keyword(s):  
Room Temperature ◽  
Photophysical Properties ◽  
Heavy Atom ◽  
Delayed Fluorescence ◽  
Room Temperature Phosphorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Donor Acceptor ◽  
Mechanochromic Luminescence ◽  
Atom Effect

<div><div><div><p>A new twisted donor–acceptor–donor (D–A–D) multi-photofunctional organic molecule comprising of phenoselenazine as the electron-donors (Ds) and dibenzo[a,j]phenazine (DBPHZ) as the electron-acceptor (A) has been developed. The developed selenium-incorporated D–A–D compound is featured with multi-color polymorphism, distinct mechanochromic luminescence, chemically-stimulated luminochromism, thermally-activated delayed fluorescence, and room- temperature phosphorescence. The internal heavy atom effect on the photophysical properties of the D–A–D system has been investigated through the comparison with the physicochemical properties of a previously developed sulfur analogue and a tellurium analogue.</p></div></div></div>

scholarly journals Heavy-Atom-Free Room-Temperature Phosphorescent Organic Light-Emitting Diodes Enabled by Excited States Engineering

2020 ◽  
Author(s):  
Heather Higginbotham ◽  
Masato Okazaki ◽  
Piotr de Silva ◽  
Satoshi Minakata ◽  
Youhei Takeda ◽  
...  
Keyword(s):  
Excited States ◽  
Room Temperature ◽  
Light Emitting Diodes ◽  
Heavy Atom ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Room Temperature Phosphorescence ◽  
Host Matrix ◽  
Light Emitting ◽  
Organic Light

Room temperature phosphorescence materials offer great opportunities for applications in optoelectronics, due to their unique photophysical characteristics. However, purely organic emitters that can realize distinct electrophosphorescence are rarely exploited. Herein a new approach for designing heavy-atom-free organic room temperature phosphorescence emitters for organic light-emitting diodes is presented. The subtle tuning of the energy diagrams of singlet and triplet excited states by appropriate choice of host matrix allows tailored emission properties and switching of emission channels between thermally activated delayed fluorescence and room temperature phosphorescence. Moreover, an efficient and heavy-atom-free room temperature phosphorescence organic light-emitting diodes using the developed emitter is realized.

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