DataVXCrystal Growth & DesignPaper
journal article·2016-02-03

Enhancing Organic Phosphorescence by Manipulating Heavy-Atom Interaction

Huifang Shi, Zhongfu An, Pei-Zhou Li, Jun Yin, Guichuan Xing, Tingchao He, Hongzhong Chen, Jingui Wang, Handong Sun, Wei Huang, Yanli Zhao

Crystal Growth & Design· Volume 16· Issue 2
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Source abstract

Abstract

Achieving highly efficient phosphorescence in metal-free materials under ambient conditions remains a major challenge in organic optoelectronics. Herein, we report a concise approach to obtaining pure organic phosphorescence with high quantum efficiency of up to 21.9% and millisecond-scale lifetime by manipulating heavy-atom interaction based on a class of dibromobenzene derivatives in the solid state under ambient conditions. By comparing two pairs of the organic compounds designed, the one with two more bromine atoms on the alky terminals (PhBr 2 C 6 Br 2 /PhBr 2 C 8 Br 2 ) showed higher luminescence efficiency than the other one (PhBr 2 C 6 /PhBr 2 C 8 ). From the single-crystal analysis, it was proposed that the enhancement of phosphorescence resulted from increased intermolecular heavy-atom interaction in the organic crystals. Furthermore, a temperature sensor was demonstrated by using a model probe of this kind of organic phosphorescent crystals. This work not only provides a concise alternative to enhance phosphorescence in metal-free materials but also extends the scope of pure organic phosphorescent materials with high luminescent efficiency in a single component.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Luminescence and Fluorescent Materials · Organic Light-Emitting Diodes Research · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore

Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, People’s Republic of China

Division of Physics and Applied Physics, Centre for Disruptive Photonic Technologies (CDPT), School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore

School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore

Funding

Agency for Science, Technology and Research · Ministry of Science and Technology of the People's Republic of China · China Postdoctoral Science Foundation · National Research Foundation-Prime Minister's office, Republic of Singapore · National Natural Science Foundation of China · Nanyang Technological University · Natural Science Fund for Colleges and Universities in Jiangsu Province

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