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Recent Advances in Room Temperature Phosphorescence Materials

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Cross-Field Chemistry".

Deadline for manuscript submissions: 31 October 2024 | Viewed by 846

Special Issue Editor


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Guest Editor
State Key Laboratory of Organic Electronics and Information Displays and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
Interests: room-temperature phosphorescence; organic afterglow; fluorescence materials; organic light-emitting diodes; exciton modulation

Special Issue Information

Dear Colleagues,

Room-temperature phosphorescence and related materials have attracted tremendous attention recently due to their spectacular photophysical properties and versatile applications in many fields. In particular, the exploration of purely organic room-temperature phosphorescent (RTP) materials is currently the focus of research in organic electronics with broad application areas spanning from information anticounterfeiting, and sensors to afterglow displays and bio-/X-ray imaging. The impressive charm of RTP materials relies on the fact that the significant breakthrough of the modulation of triplet state natures for on-demand achieving outstanding properties and functionalities through easy chemical modification with endless possibilities, revolutionizing the immanent understandings of the excited state characters originated from either organic or organic–inorganic hybrid materials. Even more impressively, the organic afterglow with persistent RTP shows ultralong-lived and persistent luminescence that can last for over 1 s under ambient conditions, demonstrating fundamental advances in performance promotion and application revolution of organic optoelectronic materials.

This Special Issue will compile recent developments in the field of high-performance RTP materials. The articles presented in this Special Issue will cover various topics, ranging from the luminescent mechanisms of RTP and afterglow, the design and characterization of RTP materials, to advanced optoelectronic applications in the fields of information encryptions, displays, programmable label and X-ray imaging, etc.

Prof. Dr. Runfeng Chen
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • room-temperature phosphorescence
  • organic afterglow
  • RTP materials
  • organic afterglow materials
  • RTP devices
  • luminescence mechanism

Published Papers (1 paper)

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Research

13 pages, 7587 KiB  
Article
Direct Population of Triplet States for Efficient Organic Afterglow through the Intra/Intermolecular Heavy-Atom Effect
by Jie Yuan, Yongrong Wang, Binbin Zhou, Wenjing Xie, Botao Zheng, Jingyu Zhang, Ping Li, Tian Yu, Yuanyuan Qi, Ye Tao and Runfeng Chen
Molecules 2024, 29(5), 1014; https://doi.org/10.3390/molecules29051014 - 26 Feb 2024
Viewed by 619
Abstract
Organic afterglow is a fascinating phenomenon with exceptional applications. However, it encounters challenges such as low intensity and efficiency, and typically requires UV-light excitation and facile intersystem crossing (ISC) due to its spin-forbidden nature. Here, we develop a novel strategy that bypasses the [...] Read more.
Organic afterglow is a fascinating phenomenon with exceptional applications. However, it encounters challenges such as low intensity and efficiency, and typically requires UV-light excitation and facile intersystem crossing (ISC) due to its spin-forbidden nature. Here, we develop a novel strategy that bypasses the conventional ISC pathway by promoting singlet-triplet transition through the synergistic effects of the intra/intermolecular heavy-atom effect in aromatic crystals, enabling the direct population of triplet excited states from the ground state. The resulting materials exhibit a bright organic afterglow with a remarkably enhanced quantum efficiency of up to 5.81%, and a significantly increased organic afterglow lifetime of up to 157 microseconds under visible light. Moreover, given the high-efficiency visible-light excitable organic afterglow emission, the potential application is demonstrated in lifetime-resolved, color-encoded, and excitation wavelength-dependent pattern encryption. This work demonstrates the importance of the direct population method in enhancing the organic afterglow performance and red-shifting the excitation wavelength, and provides crucial insights for advancing organic optoelectronic technologies that involve triplet states. Full article
(This article belongs to the Special Issue Recent Advances in Room Temperature Phosphorescence Materials)
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