Results 51 to 60 of about 21,624 (203)

Two‐Photon Excited Near‐Infrared Phosphorescence Based on Secondary Supramolecular Confinement

Advanced Science, 2022
Organic phosphorescence materials have received wide attention in bioimaging for bio‐low toxicity and large Stokes. Herein, a design strategy to achieve near‐infrared (NIR) excitation and emission of organic room‐temperature phosphorescence through two ...
Xin‐Kun Ma, Xiaolu Zhou, Jing Wu, Fang‐Fang Shen, Yu Liu   +4 more
doaj   +1 more source

Deactivation of biacetyl triplets by cyanocobaltate(III) complexes [PDF]

, 1972
The rate of electronic energy transfer from biacetyl triplets to Co(CN)_(5)(X)^(n–)(X = CN^–, MeCN, pyridine, N_(3)^–, H_(2)O, or SCN^–) is strongly dependent on the energy of the first spin-allowed d–d transition of Co(CN)_(5)(X)^(n–), and (for X = CN^–,
Bredesen, Dale, Gray, Harry B., Hammond, George S., Wrighton, Mark   +3 more
core   +1 more source

Tailoring Intermolecular Interactions for Efficient Room‐Temperature Phosphorescence from Purely Organic Materials in Amorphous Polymer Matrices [PDF]

, 2014
Herein we report a rational design strategy for tailoring intermolecular interactions to enhance room‐temperature phosphorescence from purely organic materials in amorphous matrices at ambient conditions.
Jung, Jaehun, Kim, Jinsang, Kwon, Min Sang, Lee, Dongwook, Seo, Sungbaek   +4 more
core   +2 more sources

Urea-formaldehyde resin room temperature phosphorescent material with ultra-long afterglow and adjustable phosphorescence performance

Nature Communications
Organic room-temperature phosphorescence materials have attracted extensive attention, but their development is limited by the stability and processibility.
Wensheng Xu, Bowei Wang, Shuai Liu, Wangwang Fang, Qinglong Jia, Jiayi Liu, Changchang Bo, Xilong Yan, Yang Li, Ligong Chen   +9 more
doaj   +1 more source

Room-temperature phosphorescence from metal-free polymer-based materials

Cell Reports Physical Science, 2022
Summary: Room-temperature phosphorescence (RTP) has received extensive attention in recent years due to its various potential applications. Pure organic RTP materials may overcome the shortcomings of harsh preparation conditions and high toxicity ...
Yanxiang Gong, Jie Yang, Manman Fang, Zhen Li   +3 more
doaj   +1 more source

The Effect of Purcell Cavities on the Lifetime of Thermally Activated Delayed Fluorescent Emitters

Advanced Functional Materials, EarlyView.
A pressing challenge to OLED displays and lighting is to balance high efficiency and long operational lifetime in the deep blue spectrum. The Purcell effect can reduce the triplet density and hence the probability for destructive energy‐driven triplet annihilation events that limit the OLED lifetime. Here we study of the Purcell effect on two different
Sritoma Paul, Haonan Zhao, Collin N. Muniz, Mark E. Thompson, Stephen R. Forrest   +4 more
wiley   +1 more source

Decay time characteristics of La2O2S:Eu and La2O2S:Tb for use within an optical sensor for human skin temperature measurement [PDF]

, 2008
We focus on the development of a remote temperature sensing technology, i.e., an optical laser-based sensor, using thermographic phosphors for medical applications, particularly within an electromagnetically hostile magnetic resonance imaging (MRI ...
Allison, Coyle, Fonger, Jansky, Mignani, Omrane, Ranson, Ranson, Simons, Struck, Wasner, Webster, Wickersheim   +12 more
core   +1 more source

Harnessing the Orientation of Columnar Discotic Liquid Crystals for Narrowband Blue Emission with Enhanced Out‐Coupling Efficiency Toward Improvement of SP‐OLEDs Performance

Advanced Functional Materials, EarlyView.
Solution‐processed OLEDs containing discotic liquid‐crystalline MR‐TADF emitters are reported. Supramolecular self‐assembly induces homeotropic columnar alignment, enforcing preferential horizontal orientation of the emitter transition dipole moment in spin‐coated films, which leads to an enhancement in the device light outcoupling efficiency while ...
Joydip De, Abhishek Kumar Gupta, Džiugas Litvinas, Francisco Tenopala‐Carmona, Matthias Lehmann, Malte C. Gather, Eli Zysman‐Colman   +6 more
wiley   +1 more source

Simple Vanilla Derivatives for Long-Lived Room-Temperature Polymer Phosphorescence as Invisible Security Inks

Research, 2021
Developing novel long-lived room-temperature polymer phosphorescence (RTPP) materials could significantly expand their application scope. Herein, a series of RTPP materials based on eight simple vanilla derivatives for security ink application are ...
Yongfeng Zhang, Zhonghao Wang, Yan Su, Yan Zheng, Wenji Tang, Chaolong Yang, Hailong Tang, Lunjun Qu, Youbing Li, Yanli Zhao   +9 more
doaj   +1 more source

Uncovering the Origin of Efficiency Roll‐Off in TADF OLEDs

Advanced Functional Materials, EarlyView.
OLEDs based on thermally activated delayed fluorescent (TADF) materials often suffer from a severe drop in efficiency at high brightness levels. This work presents a technique to uncover the source of this efficiency drop, and quantifies the exciton‐exciton and exciton‐polaron annihilation processes responsible for efficiency losses in our TADF OLEDs ...
Liam G. King, Kou Yoshida, Arvydas Ruseckas, Ifor D. W. Samuel   +3 more
wiley   +1 more source