Article
Chemistry, Multidisciplinary
Xing Chen, Guoyun Meng, Guanming Liao, Florian Rauch, Jiang He, Alexandra Friedrich, Todd B. Marder, Nan Wang, Pangkuan Chen, Suning Wang, Xiaodong Yin
Summary: A series of 9-borafluorene derivatives functionalized with electron-donating groups were synthesized, some of which showed strong yellowish emission. The new compounds exhibited enhanced stability towards the atmosphere and excellent thermal stability, demonstrating great potential for applications in materials science. Organic light-emitting diode (OLED) devices fabricated with two of the highly emissive compounds displayed strong yellow-greenish electroluminescence, reaching a maximum luminance intensity of over 22,000 cd m(-2).
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Review
Chemistry, Multidisciplinary
Zhihong Sun, Aaqib Khurshid, Muhammad Sohail, Weidong Qiu, Derong Cao, Shi-Jian Su
Summary: This review summarizes the recent progress on the design and constructions of dye encapsulated luminescent MOFs phosphors, highlighting different strategies where white light emitting phosphors were obtained by combining fluorescent dyes with metal ions and linkers.
Article
Multidisciplinary Sciences
Jin-Hoon Kim, Jin-Woo Park
Summary: An intrinsically stretchable organic light-emitting diode, made of highly stretchable constituent materials, is able to emit light under strains as large as 80%. It has a low turn-on voltage of 8 V and a maximum luminance of 4400 cd m(-2) from both the anode and cathode sides. The device can withstand repeated stretching cycles up to 200 times and shows improved light-emitting efficiency with small stretches up to 50%.
Article
Optics
Jou-An Chen, Michal Piasecki, Chun-Chuen Yang, Myron Rudysh, Wei-Ren Liu
Summary: A series of Sr8MgGa(PO4)(7):Eu2+ (SMGP:Eu2+) phosphors were prepared and characterized for their luminescence properties, crystal structure, and application in WLEDs. The SMGP:1%Eu2+ phosphor showed intense yellow emission suitable for WLEDs applications.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Multidisciplinary
Xiangyu Fu, Yash Mehta, Yi-An Chen, Lei Lei, Liping Zhu, Nilesh Barange, Qi Dong, Shichen Yin, Juliana Mendes, Siliang He, Renuka Gogusetti, Chih-Hao Chang, Franky So
Summary: The study demonstrates highly directional and polarized light emission from LEDs by selectively diffracting the TE waveguide mode, showing potential for more efficient photonic applications.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Shinichi Tan, Kazuya Jinnai, Ryota Kabe, Chihaya Adachi
Summary: This study confirms the presence of long-persistent luminescence (LPL) under electrical excitation, a characteristic that has previously only been observed in organic long-persistent luminescent systems (OLPLs) and not in organic light-emitting diodes (OLEDs).
ADVANCED MATERIALS
(2021)
Article
Optics
Ruixia Wu, Xiaokang Li, Weiqiang Liu, Liang Zhou
Summary: This article presents white organic light-emitting diodes (WOLEDs) incorporating different emitting layers with blue, green, and red phosphorescent small molecular materials. By selecting different hosts with transmission characteristics, the WOLEDs achieved high efficiencies, low operating voltage, and slow efficiency roll-off. The recombination zone and spectral changes were studied to understand the light-emitting mechanisms. The optimal device exhibited high efficiencies, low operating voltage, and desirable color coordinates.
Article
Chemistry, Multidisciplinary
Shu-Jen Wang, Anton Kirch, Michael Sawatzki, Tim Achenbach, Hans Kleemann, Sebastian Reineke, Karl Leo
Summary: Conventional organic optoelectronic devices have low carrier mobility due to disorder. This study presents monolithic integrated triclinic crystal rubrene light-emitting diodes (LEDs) with engineered functional additives. The crystalline LEDs show superior charge transport, operational stability, and long-term stability. However, the crystalline phase reduces the overall performance compared to amorphous rubrene in terms of exciton dynamics and annihilation rates. The potential applications of rubrene and/or its derivatives crystalline films for improving the performance of organic and hybrid optoelectronic devices are discussed.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Qiang Zhang, Xicheng Wang, Xiaopeng Zhou, Yuhua Wang
Summary: In this study, Rb2Sr1-yCayP2O7:xEu(2+) solid solutions with yellow-orange color-tunable luminescence were designed for potential applications in WLEDs, showing high efficiency and good performance. By combining BAM:Eu2+ and Rb2SrP2O7:0.5% Eu2+ phosphors with a 380 nm n-UV chip, a WLED device was successfully fabricated to emit white light with good performance.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Yuxiong Li, Xiaozhao Zhu, Fengfeng Liu, Zhanpeng Sui, Bo Wang, Chunping Jiang, Liangsheng Liao
Summary: In this study, the hole-injection efficiency of TOLEDs was enhanced by depositing MoNx layers with different growth time on Al layers. The experimental results show that Al/MoNx layers can be effective hole-injection anodes for achieving high-performance TOLEDs.
Article
Chemistry, Inorganic & Nuclear
Dayu Huang, Pan Zheng, Ziyong Cheng, Qianqian Yang, Youchao Kong, Qiuyun Ouyang, Hongzhou Lian, Jun Lin
Summary: A hydrothermal method is used to synthesize two different single crystal materials with different shapes and phases. These materials can emit deep blue light and pure blue light. The difference in the distribution of Cl energy states is found to be the reason for the difference in luminescence properties.
INORGANIC CHEMISTRY
(2023)
Article
Engineering, Environmental
Lang Qu, Hui Xiao, Bao Zhang, Qingping Yang, Jintong Song, Xiangge Zhou, Zong-Xiang Xu, Haifeng Xiang
Summary: Researchers have designed and prepared a pair of intrinsically chiral OLED materials for CP-OLEDs. These materials have low cost and high electroluminescence efficiency, making them suitable for antiglare filters and 3D displays. When used in solution-processed CP-OLEDs, they achieve high luminance and efficiency as the emissive layer.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Cheng Chen, Tongtong Xuan, Yang Yang, Fan Huang, Tianliang Zhou, Le Wang, Rong-Jun Xie
Summary: This study proposes improving the optical properties of CsPbI3:Sr emissive layer (EML) in perovskite light-emitting diodes (PeLEDs) by inserting an additional potassium iodide (KI) passivation layer. The results demonstrate that the use of a KI layer can lead to high-performance PeLEDs with higher quantum efficiency and longer lifetime.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Wenwen Wu, Yue Liu, Xinping Zhang
Summary: Researchers have developed a large-area array of nanoscale organic light-emitting diodes (OLEDs) that produce amplified emission with a selected spectrum in a narrow band. These OLEDs share a common active layer that acts as a waveguide and gain channel for light-emitting signals. The periodic structure of the array allows for diffraction and confinement of the electroluminescence signal, resulting in strong spectral selectivity and amplification.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Yang Li, Dejiang Zhao, Wei Huang, Zhiqiang Jiao, Lu Wang, Qingyu Huang, Peng Wang, Mengna Sun, Guangcai Yuan
Summary: An inverted red quantum dot light-emitting diode (QLED) with an organic emitting layer (EML) achieved peak current efficiency (CE) and external quantum efficiency (EQE) of 25.63 cd/A and 23.20%, respectively. The organic EML acted as an exciton harvester, capturing leaked electrons and injected holes to enhance the emission of quantum dots. Additionally, the insertion of the organic EML improved hole injection and balanced electron injection in the device, leading to a 2-fold improvement in CE and EQE compared to the control device, along with a better operational lifetime.
Article
Chemistry, Multidisciplinary
Yu Tian, Xuekang Yang, Yanbin Gong, Yunsheng Wang, Manman Fang, Jie Yang, Zhiyong Tang, Zhen Li
Summary: The design and synthesis of a phenothiazine derivative PtzChol containing a non-conjugated chiral cholesterol group was found to have positive effects on the production of chiral space group, mechanoluminescence (ML), and room temperature phosphorescence (RTP). The analysis of single crystal structure and circular dichroism (CD) signals before and after grinding revealed that the CD signal effectively reflected the changes in molecular arrangement during the entire light-emitting process.
SCIENCE CHINA-CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Yunsheng Wang, Heqi Gao, Jie Yang, Manman Fang, Dan Ding, Ben Zhong Tang, Zhen Li
Summary: A new strategy of integrating RTP host and RTP guest in one doping system to enhance the phosphorescence performance of organic materials is reported. This approach successfully enables high-contrast tumor labeling in living mice and encrypted pattern design in thermal printing.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jia Ren, Yunsheng Wang, Yu Tian, Zhenjiang Liu, Xiangheng Xiao, Jie Yang, Manman Fang, Zhen Li
Summary: Research on abnormal stimulus-responsive organic room-temperature phosphorescence effect is conducted, showing persistent phosphorescence of Czs-ph-3F under grinding. Experimental results and theoretical calculations indicate that the transition of molecular conformation of the phenothiazine group is mainly responsible for this result. Furthermore, applications of stylus printing and thermal printing based on the unique RTP effect of Czs-ph-3F are successfully realized.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Chemistry, Multidisciplinary
Yang Yujie, Yang Jie, Fang Manman, Li Zhen
Summary: Research on photo-responsive materials, specifically utilizing the strategy of combining AIE and photochromic properties, has been a subject of increasing interest due to their wide applications. Recent progress in the field has focused on the changes in UV absorbance or PL phenomenon under UV-irradiation, providing insight into molecular structures, internal mechanisms, and practical applications of these materials. Furthermore, there are promising outlooks for further exploration in this area.
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
(2021)
Article
Chemistry, Multidisciplinary
Yunsheng Wang, Jie Yang, Manman Fang, Yanxiang Gong, Jia Ren, Liangjing Tu, Ben Zhong Tang, Zhen Li
Summary: Purely organic room-temperature phosphorescence (RTP) materials with stimulus response characteristic have attracted attention for their potential applications. The materials exhibit efficient RTP emissions and good photostability, making them attractive for various fields.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Multidisciplinary Sciences
Dan Li, Yujie Yang, Jie Yang, Manman Fang, Ben Zhong Tang, Zhen Li
Summary: The authors report a stimulus-responsive room temperature phosphorescent material composed of arylboronic acid and poly(vinylalcohol), which has color tunable and processable properties. This material shows sensitivity to water and heat stimuli and can be adjusted in color by introducing other fluorescent dyes.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Yu Tian, Jie Yang, Mingxue Gao, Zhenjiang Liu, Meiting Zhao, Manman Fang, Zhen Li
Summary: Two pure organic compounds, PBO and PBS, were designed and synthesized in this study, which form organic microporous crystals with good stability against strong acids and bases through specific molecular structures. These microporous materials exhibit crystal-to-crystal transformation properties when exposed to different organic vapors.
MATERIALS HORIZONS
(2022)
Review
Materials Science, Multidisciplinary
Manman Fang, Jie Yang, Zhen Li
Summary: This article provides a detailed introduction of the generation, mechanism, and application of light emissions, especially in aggregate or solid state. It summarizes the relationship between molecular structure/packing and emission property, and explores the application of novel materials and technologies.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Optics
Zhenjiang Liu, Yu Tian, Jie Yang, Aisen Li, Yunsheng Wang, Jia Ren, Manman Fang, Ben Zhong Tang, Zhen Li
Summary: The study designed and synthesized eight phenothiazine 5,5-dioxide derivatives to reveal how the monomer and dimer in packing affect RTP behavior. Dimers with strong π-π stacking lead to pure triplet excimer emission, while dimers with weak π-π stacking contribute to dual RTP emissions of both monomer and triplet excimer.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Multidisciplinary Sciences
Dan Li, Jie Yang, Manman Fang, Ben Zhong Tang, Zhen Li
Summary: The strategy of achieving stimulus-responsive ultralong room temperature phosphorescence (RTP) with color-tunable emissions using water as solvent in the preparation process is reported. By covalent linkage of arylboronic acids with different IC conjugations and polymer matrix of polyvinyl alcohol, the polymer films exhibit outstanding RTP performance. The RTP property of these materials is sensitive to water and heat stimuli. Furthermore, they have been successfully applied in multilevel information encryption and multicolor paper and ink.
Article
Chemistry, Multidisciplinary
Mingxue Gao, Yu Tian, Xiaoning Li, Yanxiang Gong, Manman Fang, Jie Yang, Zhen Li
Summary: The research on purely organic room-temperature phosphorescence (RTP) materials has gained great attention due to their wide range of potential applications. This study focuses on the self-doping effect on the RTP property by designing phenothiazine derivatives with two distinct molecular conformations and studying their RTP behaviors in different states.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Yunsheng Wang, Mingxue Gao, Jia Ren, Jiayi Liang, Yao Zhao, Manman Fang, Jie Yang, Zhen Li
Summary: The development of multifunctional luminescent materials is important but difficult due to different requirements for molecular structure in different luminescent properties. This study reported a universal exciplex platform to construct multifunctional luminescent materials, including thermally-activated delayed fluorescence (TADF), persistent room temperature phosphorescence (RTP) and mechanoluminescence (ML). The exciplex system, using compound PTZ-CN as an electron donor and its derivative of OPTZ-CN as an electron acceptor, showed efficient TADF with a quantum yield of up to 61%, persistent RTP lasting for more than 3 minutes, and bright blue ML emission. Thus, this work opens a new way for the construction of multifunctional luminescent materials, which will greatly promote further development in this research area.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Multidisciplinary Sciences
Kai Chang, Leyi Xiao, Yuanyuan Fan, Juqing Gu, Yunsheng Wang, Jie Yang, Mingzhou Chen, Yufeng Zhang, Qianqian Li, Zhen Li
Summary: Metastasis is the main cause of cancer-related deaths, and early detection of tumor metastasis is crucial for better prognoses. In this study, a phosphorescence imaging method using organic nanoparticles was developed to detect microenvironmental changes associated with early tumor metastasis, allowing for early detection before the formation of secondary tumors. This method demonstrated superior sensitivity and convenience compared to other imaging methods, detecting metastases as early as day 3 in experimental models.
Article
Materials Science, Multidisciplinary
Jia Ren, Yu Tian, Yunsheng Wang, Jie Yang, Manman Fang, Zhen Li
Summary: This study provides a strategy to regulate molecular packing and room temperature phosphorescence (RTP) performance, and shows the significant impact of intermolecular π-π interactions on phosphorescence lifetime. Furthermore, these compounds were successfully used in silk-screen printing and multiple anti-counterfeiting techniques.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Review
Chemistry, Multidisciplinary
Yanxiang Gong, Jie Yang, Manman Fang, Zhen Li
Summary: This review summarizes the latest progress in polymer-based room-temperature phosphorescence (RTP) materials and elaborates on two strategies, chemical bonding and physical blending. Challenges and perspectives are proposed for improving RTP performance and developing new applications, particularly in amorphous polymers.
CELL REPORTS PHYSICAL SCIENCE
(2022)
