Article
Chemistry, Physical
Aditya Mishra, Stephen DiLuzio, Masoud Alahbakhshi, Austen C. Adams, Melanie H. Bowler, Jiyoung Moon, Qing Gu, Anvar A. Zakhidov, Stefan Bernhard, Jason D. Slinker
Summary: By utilizing a CsPbBr3 perovskite host and a novel ionic iridium complex guest, along with a polyelectrolyte, efficient light-emitting electrochemical cells (PeLECs) with significantly improved performance and enhanced luminance efficiency were achieved in this study.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Haonan Zhao, Jongchan Kim, Kan Ding, Mina Jung, Yongxi Li, Harald Ade, Jun Yeob Lee, Stephen R. Forrest
Summary: By incorporating a sterically bulky, electron-transporting host material into a conventional single host-guest emissive layer, the phase separation of the host matrix can be suppressed, leading to improved efficiency and operational lifetime of deep-blue phosphorescent organic light-emitting diodes (PHOLEDs). This bulky host allows for homogeneous mixing of the emissive layer molecules while preventing single host aggregation and nonradiative recombination. The controlled amorphous phase morphology of the mixed-host device reduces nonradiative exciton decay and enhances external quantum efficiency by 120 +/- 6% compared to a similar single-host device. Additionally, the mixed host facilitates the conduction of both charge carriers, reducing the probability of exciton annihilation and doubling the operational lifetime of deep-blue PHOLEDs.
ADVANCED MATERIALS
(2023)
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
Chemistry, Multidisciplinary
Yi-Pin Zhang, Meng-Xi Mao, Shi-Quan Song, Yi Wang, You-Xuan Zheng, Jing-Lin Zuo, Yi Pan
Summary: In this study, we introduce the first circularly polarized white organic light-emitting diodes (CP-WOLEDs) based on all thermally activated delayed fluorescence (TADF) materials. These CP-OLEDs exhibit excellent device performances and warm white emission.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
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
Materials Science, Multidisciplinary
Wei Liu, Jingwen Yao, Qian Sun, Yanfeng Dai, Dezhi Yang, Xianfeng Qiao, Tengfei Zhu, Qiang Li, Dongge Ma
Summary: This study demonstrates the importance of the energy level relationship between hosts and guests, as well as the need to improve electron and hole injection efficiency and electron mobility to ensure effective injection. Therefore, optimizing the design of the host-guest system can achieve high-efficiency PHOLEDs.
ORGANIC ELECTRONICS
(2021)
Article
Polymer Science
Weijie Zhu, Hao Xing, Errui Li, Huangtianzhi Zhu, Feihe Huang
Summary: This study presents a new strategy to enhance organic phosphorescence in the amorphous state through copolymerization and host-guest complexation. The random copolymer synthesized exhibited satisfactory phosphorescent behavior and the quantum yield and lifetime were further improved after complexation with K+. This work opens up new possibilities for the development of phosphorescent polymeric materials with advantages of simple preparation, processability, and controllability.
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
Chemistry, Multidisciplinary
Deli Li, Di Liu, Jiuyan Li, Ruizhi Dong, Botao Liu, Qinhe Wei
Summary: Two molecules, 3-BPyBCz and o-BPyBCz, have been developed as host materials for sky-blue phosphorescent organic light-emitting diodes (PhOLEDs), with extremely low driving voltages and superior performance.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Optics
Xiugang Wu, Bo-Kang Su, Deng-Gao Chen, Denghui Liu, Chi-Chi Wu, Zhi-Xuan Huang, Ta-Chun Lin, Cheng-Ham Wu, Mengbing Zhu, Elise Y. Li, Wen-Yi Hung, Weiguo Zhu, Pi-Tai Chou
Summary: The study reveals that effective multiple-resonance thermally activated delayed fluorescence requires suitable host-guest interactions to boost TADF. Additionally, this boosted-TADF mechanism can be applied to any fluorescence dye with a thermally accessible energy gap, enabling the development of high-performance organic light-emitting diodes.
Article
Materials Science, Multidisciplinary
Xiaomei Peng, Kuo Gao, Weidong Qiu, Zhida Xu, Mengke Li, Wentao Xie, Jiaji Yang, Deli Li, Kunkun Liu, Shi-Jian Su
Summary: Doping-free organic light-emitting diodes (OLEDs) can benefit from TADF emitters with thioether units, which suppress intermolecular interaction and alleviate ACQ effect. Ultrathin emission layer (UEML) structure can achieve comparable efficiencies for both emitters and also works for red TADF emitters with stronger intermolecular interactions. This UEML strategy holds great promise for doping-free OLEDs.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Optics
Fatemeh Abbasi, Seyed Mohammad Bagher Ghorashi, Elmira Karimzadeh, Parvin Eskandarian
Summary: In this study, a low-cost and effective device structure for near-infrared (NIR) organic light-emitting diodes (OLEDs) was developed by introducing copper phthalocyanine (CuPc) as a dopant. The electroluminescent performance of the device was evaluated and compared to simulation results. Different CuPc concentrations were investigated to analyze the emission spectra and external quantum efficiency (EQE) of the doped OLEDs. An optimized NIR OLED with 4 wt% CuPc achieved superior performance and a maximum EQE value of 0.27%.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Hanlin Li, Chengwei Lin, Yibing Wu, Xianfeng Qiao, Dezhi Yang, Yanfeng Dai, Qian Sun, Tansir Ahamad, Zhujin Zhao, Dongge Ma
Summary: Aggregation-induced delayed fluorescence (AIDF) materials have high quantum efficiency and efficient exciton utilization in non-doped OLEDs. This study investigates the electroluminescence (EL) mechanism of an AIDF emitter in detail and successfully fabricates high-efficiency red phosphorescent OLEDs based on it. The research provides insights into the low efficiency roll-off of AIDF non-doped OLEDs and their application in PHOLEDs.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
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
Fan-Cheng Kong, Yuan-Lan Zhang, Cassandre Quinton, Nemo McIntosh, Sheng-Yi Yang, Joelle Rault-Berthelot, Fabien Lucas, Clement Brouillac, Olivier Jeannin, Jerome Cornil, Zuo-Quan Jiang, Liang-Sheng Liao, Cyril Poriel
Summary: Efficient host materials for phosphorescent OLEDs (PhOLEDs) have traditionally been constructed with heteroatoms, but this approach increases design complexity and instability. This study demonstrates the use of pure aromatic hydrocarbon materials as highly efficient hosts for white and blue PhOLEDs, achieving comparable or higher efficiency compared to heteroatom-based hosts. These findings suggest that pure aromatic hydrocarbon materials offer a promising alternative for the future development of the OLED industry.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Sheng-Yi Yang, Zi-Qi Feng, Zhiyuan Fu, Kai Zhang, Song Chen, You-Jun Yu, Bo Zou, Kai Wang, Liang-Sheng Liao, Zuo-Quan Jiang
Summary: The pi-stacked thermally activated delayed fluorescence (TADF) material SDMAC exhibits multi-stimulus response properties, leading to efficient OLED manufacturing and various potential applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Junli Chang, Qi Wu, Chun-Hong Gao, Yuhong Huang, Meng Ju, Guangzhao Wang, Hongkuan Yuan, Hong Chen
Summary: This study systematically investigates the properties of CsPb1-alpha Zn alpha I3-beta X beta (X = CI or Br), and finds that Zn/Cl/Br mono-doping and co-doping efficiently tune bandgaps and enhance visible-light responses. CsPb0.625Zn0.375I2Cl and CsPb0.623Zn0.373I2Br are identified as good choices for photovoltaic applications. Furthermore, the exploration of the physically accessible region provides new insights for the design of highly efficient and low-lead perovskite-based optoelectronic materials.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Biochemistry & Molecular Biology
Xin-Yue Meng, Zi-Qi Feng, You-Jun Yu, Liang-Sheng Liao, Zuo-Quan Jiang
Summary: By utilizing thermally activated delayed fluorescence emitters, two blue TADF emitters with high device efficiency and color purity have been constructed and successfully applied in OLED devices.
Review
Chemistry, Multidisciplinary
You-Jun Yu, Fu-Ming Liu, Xin-Yue Meng, Ling-Yi Ding, Liang-Sheng Liao, Zuo-Quan Jiang
Summary: Carbonyl-containing derivatives have shown great potential in the field of thermally activated delayed fluorescence (TADF) materials, especially in the construction of multi-resonance TADF emitters. Researchers have summarized the current progress in both traditional and MR-type ketone derivatives with TADF characteristics, and introduced molecular design strategies for maintaining high device efficiency and narrow-band emission profile.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Optics
Xiao-Li He, Run Wang, Xing -Chen Wang, Qiang Xu, Xin-Mei Huang, Ping Chen, Yong Zhang, Chun -Hong Gao
Summary: In this study, the quality and optical properties of perovskite films were improved by introducing PEABr and BTPPC additives, resulting in a significant improvement in the external quantum efficiency of PeLEDs and enhanced stability of the devices.
JOURNAL OF LUMINESCENCE
(2022)
Correction
Engineering, Biomedical
Jiejie Sun, Jingzhou Liu, Chunhong Gao, Jinpeng Zheng, Jinbang Zhang, Yaning Ding, Wei Gong, Meiyan Yang, Zhiping Li, Yuli Wang, Yang Yang, Chunsheng Gao
ACTA BIOMATERIALIA
(2023)
Article
Chemistry, Multidisciplinary
Zi-Qi Feng, Sheng-Yi Yang, Fan-Cheng Kong, Yang-Kun Qu, Xin-Yue Meng, You-Jun Yu, Dong-Ying Zhou, Zuo-Quan Jiang, Liang-Sheng Liao
Summary: This study reports two TSCT-TADF emitters and successfully enhances their luminescent properties by controlling the molecular configuration without directly modifying the donor or acceptor. The emitter with the fluorine moiety exhibits more evident electrostatic repulsive force onto the central structure, resulting in higher external quantum efficiency.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yuan-Lan Zhang, Sheng-Yi Yang, Zi-Qi Feng, Yang-Kun Qu, Dong-Ying Zhou, Cheng Zhong, Liang-Sheng Liao, Zuo-Quan Jiang
Summary: The power efficiency (PE) at high brightness in white organic light-emitting diodes (WOLEDs) has been significantly enhanced by utilizing pi-stacked host molecular with spirofluorene scaffold. This unique molecular design has led to high external quantum efficiencies (EQEs) in RGB monochromic OLEDs and record-high current efficiency (CE), PE, and EQE in warm WOLEDs, surpassing conventional fluorescent tubes in performance without the need for any light extraction technique.
SCIENCE CHINA-CHEMISTRY
(2022)
Article
Health Care Sciences & Services
Keyu Chen, Bin Xu, Yifan Tang, Juan Cao, Rong Wang, Yali Tian, Chunhong Gao, Ming Chu
Summary: This study identified loopholes in the management of community screening for SARS-CoV-2 Omicron variant in Shanghai, China, and proposed targeted solutions.
RISK MANAGEMENT AND HEALTHCARE POLICY
(2023)
Article
Chemistry, Applied
Chunhong Gao, Jinjia Liu, Meilin Jia, Gala Sa, Aiju Xu
Summary: Photocatalytic technology using TiO2 and V-TiO2 as catalysts showed improved degradation efficiency for aniline. The V-doped TiO2 exhibited redshifted absorption band edges, reduced band gap value, improved photocatalytic activity, and broadened optical response range. The optimal V concentration for degrading aniline was found to be 1.5 mol%, and moderate V modification inhibited the complexation of e(-)/h+ pairs effectively.
Review
Chemistry, Multidisciplinary
Peng Zuo, Yang-Kun Qu, Qi Zheng, Liang-Sheng Liao, Zuo-Quan Jiang
Summary: Sensitized organic light-emitting diodes (OLEDs) have received extensive attention due to their improvements in exciton utilization. This review systematically summarizes the mechanisms of sensitized OLEDs, including phosphorescent, TADF, and exciplex sensitizers. It also introduces the functions and selection criteria of sensitizers for different types of sensitized OLEDs. The hope is that this review will assist researchers in designing highly efficient and long-lasting sensitized OLEDs.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Computer Science, Artificial Intelligence
Kangyu Ji, Weizhe Lin, Yuqi Sun, Lin-Song Cui, Javad Shamsi, Yu-Hsien Chiang, Jiawei Chen, Elizabeth M. Tennyson, Linjie Dai, Qingbiao Li, Kyle Frohna, Miguel Anaya, Neil C. Greenham, Samuel D. Stranks
Summary: Emerging functional materials like halide perovskites are inherently unstable and cause long-term instability in optoelectronic devices. This study proposes a self-supervised machine learning model that can recover images without high-quality references, enabling fast measurements. By performing operando luminescence mapping, the researchers discovered the degradation mechanism in halide perovskite optoelectronic devices during operation.
NATURE MACHINE INTELLIGENCE
(2023)
Article
Engineering, Electrical & Electronic
Qi Zheng, Xue-Qi Wang, Yang-Kun Qu, Guohua Xie, Liang-Sheng Liao, Zuo-Quan Jiang
Summary: The solubility of luminescent materials is crucial for improving the performance of solution-processed OLEDs. This study introduces solubilizing groups to the linker, resulting in highly efficient solution-processed OLEDs. The findings demonstrate the successful transformation of a TSCT material from thermal evaporation to solution-processing.
NPJ FLEXIBLE ELECTRONICS
(2022)
