Article
Optics
Guo-Dong Zou, Chun-Bo Duan, Sai-Wen Lu, Xiang-Hua Zhao, Qi-Long Du, Hui Xu, Jian-Feng Zhao, Ling-Hai Xie, Xin-Wen Zhang, Dong-Jie Deng
Summary: A spiroconfigured phenothiazine dioxide compound was synthesized and systematically studied for its structure and properties. The compound showed high thermal and morphological stabilities and achieved high performance OLEDs as a host.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Multidisciplinary
Ramanaskanda Braveenth, Hyuna Lee, Jae Doh Park, Ki Joon Yang, Soon Jae Hwang, Kenkera Rayappa Naveen, Raju Lampande, Jang Hyuk Kwon
Summary: By designing and synthesizing two new deep blue TADF materials, deep blue emission and high efficiency have been achieved in OLED devices. The deep blue TADF emitters exhibit outstanding external quantum efficiency and high photoluminescence quantum yields.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Gediminas Kreiza, Dovydas Banevicius, Saulius Jursenas, Francesco Rodella, Peter Strohriegl, Karolis Kazlauskas
Summary: Designing host materials for blue TADF OLEDs is challenging. This study used ambipolar hosts with acridine donor and triazine acceptor to address this challenge. The performance of blue TADF OLEDs with ambipolar hosts was compared to benchmark host mCBP, and the ambipolar hosts showed enhanced device stability.
ORGANIC ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Qing Xia, Yuhao Xiang, Yujie Gong, Shuai Li, Yishi Wu, Zhijia Wang, Hongbing Fu
Summary: Researchers designed a deep-blue exciplex system consisting of mCBP and DNPhB, which not only exhibits thermally activated delayed fluorescence (TADF) characteristics but also acts as a host with efficient Dexter energy transfer. The OLED fabricated using this exciplex emitter shows excellent performance in brightness and color coordinates, making it suitable for potential applications such as wide color display.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Jinkun Bian, Su Chen, Lili Qiu, Rundong Tian, Yi Man, Yidan Wang, Shuo Chen, Jing Zhang, Chunbo Duan, Chunmiao Han, Hui Xu
Summary: Emerging multi-resonance thermally activated delayed fluorescence (TADF) emitters have shown great potential for organic light-emitting diodes (OLEDs) due to their high exciton harvesting efficiency and color purity. This study demonstrates an ambipolar self-host featured MR emitter, tCBNDADPO, which incorporates host segments to improve TADF properties without involving additional charge transfer and/or vibrational components. The tCBNDADPO emitter shows narrowband blue emission, high photoluminescence and electroluminescence quantum efficiencies, and 100% internal quantum efficiency, indicating the feasibility of the ambipolar self-host strategy for constructing practical MR materials.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Cyril Poriel, Joelle Rault-Berthelot, Zuo-Quan Jiang
Summary: The development of phosphorescent organic light-emitting diodes (PhOLEDs) relies on the molecular design of high-efficiency host materials for red, green, and blue phosphors. By fine tuning the electronic and physical properties of the host materials, high External Quantum Efficiencies (EQEs) can be achieved. Pure hydrocarbon materials show potential for next-generation PhOLEDs.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Materials Science, Multidisciplinary
Tae Hoon Ha, Jong-Kwan Bin, Chil Won Lee
Summary: In this study, two host materials were designed and synthesized for improving the lifetime of blue TADF OLEDs. These materials, which incorporate pyridine core carbazole connected at different linking positions, exhibit good thermal stability, high BDE, and longer lifetime than the reference host. The best device performances were achieved by a blue TADF OLEDs system consisting of a specific host and dopant, with a maximum EQE of 16.2% and an improvement of 88% in operational lifetime.
ORGANIC ELECTRONICS
(2022)
Article
Engineering, Environmental
Deli Li, Mengke Li, Wei Li, Wenqi Li, Zijian Chen, Xiaomei Peng, Denghui Liu, Guo-Xi Yang, Simin Jiang, Yiyang Gan, Zhihai Yang, Kunkun Liu, Shi-Jian Su
Summary: Spiral donor units have been the focus of extensive research in designing highly emissive thermally activated delayed fluorescence (TADF) emitters. This study develops several spiral donor-based host materials to reveal the significance of spiral donor units in constructing highly efficient host materials. The incorporation of spiral donor increases the intermolecular distance to reduce the concentration quenching effect of dopant, and the high triplet energy level of spiral donor improves the device performance through an additional energy transfer channel.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Dong Jun Kim, Seung-Hyun Baek, Woo-Sam Kim, Kwang-Hyun Ahn, Jeong-Hwan Lee
Summary: By developing different p-type blue host molecules and an n-type host molecule, we successfully achieved blue phosphorescent OLEDs with long operational lifetimes and high efficiency. Controlling the photophysical and charge transport behaviors of the molecules allowed us to reduce trapped polarons in the emitting layer and realize high-performance blue PhOLEDs.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Yoon Sung Kim, Junseop Lim, Jun Yeob Lee, Yoonkyoo Lee, Changwoong Choo
Summary: Two new materials with CN units are synthesized as N-type hosts for a mixed host, showing high external quantum efficiency and effective management of blue phosphorescent device performance by engineering charge transfer characteristics.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yanchao Xie, Lei Hua, Zhi Wang, Yuerong Liu, Shian Ying, Yuchao Liu, Zhongjie Ren, Shouke Yan
Summary: In this study, we developed a rigid deep-blue emitter, TB-3tBuCz, by integrating 2,12-di-tert-butyl-5,9-dioxa-13b-boronaphtho[3,2,1]anthracene as the acceptor and 3,6-bis(3,6-di-tert-butylcarbazol-N-yl)carbazole as the donor. By doping TB-3tBuCz with 2,6-DCzPPy host, significant thermally activated delayed fluorescence (TADF) behavior was observed. Solution-processed OLEDs based on 2,6-DCzPPy/TB-3tBuCz achieved a high external quantum efficiency (EQE) of 14.6% with suppressed efficiency roll-off.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Hao Zhang, Jianan Xue, Chenglong Li, Shitong Zhang, Bing Yang, Yu Liu, Yue Wang
Summary: A new hybrid local and charge transfer (HLCT) molecule 2TPA-PPI has been developed for high-performance OLEDs. 2TPA-PPI functions as both an efficient emitter and a multi-functional emitting host matrix for phosphorescent OLEDs. By adopting the HLCT/phosphor hybrid strategy, high-efficiency candle light-style OLEDs and quasi-white OLEDs with excellent performance have been achieved.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Soo Jong Park, Kwang Wook Choi, Young Wook Park, Byeong-Kwon Ju
Summary: By utilizing a mixed host structure, blue TADF OLEDs with enhanced efficiency and suppressed efficiency roll-offs were fabricated. The materials mCBP and DPEPO, commonly used as hosts in blue TADF OLEDs, exhibit a trade-off between material stability and efficiency. The mixed-host structure facilitated a maximum efficiency of 18.1% and a significantly higher critical current density compared to the DPEPO device.
Article
Materials Science, Multidisciplinary
Chao Tang, Jianmei Chen, Yuxin Li, Xinchao Liu, Lili Zhang, Fangfang Wang, Jia Hu, Xudong Cao, Tao Jiang
Summary: Three new pyridine-cored alkyl-substituted carbazole derivatives were synthesized and their performances in organic electroluminescent devices were comprehensively studied. Among them, 2,7-MeCzPy exhibited the best EL performance, followed by 3,6-tBuCzPy and 3,6-MeCzPy.
ELECTRONIC MATERIALS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Hyuna Lee, Jun Hyuk Park, Ki Joon Yang, Soon Jae Hwang, Ramanaskanda Braveenth, Tae Hoon Ha, Min Han, Chil Won Lee, Jang Hyuk Kwon
Summary: Two novel CN-substituted OTP core based bipolar type host materials were designed and synthesized for blue TADF devices, showing impressive photophysical properties and charge carrier transporting abilities. When combined with a stable blue TADF dopant, the host materials led to enhanced device efficiencies, showcasing excellent current and external quantum efficiencies.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Physical
Yang Tingting, Di Zhang, Yaping Zhao, Huixia Xu, Wang Hua, Zhixiang Gao, Wenshan Qu, Xu Bingshe
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2020)
Article
Materials Science, Multidisciplinary
Yan Xia, Zemei Liu, Jie Li, Congcong Fan, Geng Li, Bo Zhao, Yuling Wu, Hua Wang, Kunpeng Guo
ORGANIC ELECTRONICS
(2020)
Article
Chemistry, Organic
Zhixiang Gao, Tingting Yang, Wenshan Qu, Jiangang Li, Xiaxia Fan, Xiangbin Tian, Wei Li, Hongwei Zhu, Jinhai Huang, Lijuan Dong, Yunlong Shi, Hua Wang
TETRAHEDRON LETTERS
(2020)
Article
Materials Science, Multidisciplinary
Yabo Xu, Zemei Liu, Xiaozhen Wei, Jinmeng Wu, Jingyun Guo, Bo Zhao, Hua Wang, Shaoping Chen, Yinke Dou
Summary: By adding DMSO in PEDOT:PSS solution and subjecting the films to DMSO vapor post-treatment, the electrical conductivity and Seebeck coefficient of poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) films are optimized, leading to an enhancement in power factor. Through microscopical investigations and analysis of carrier concentration, it is confirmed that the improvements in thermoelectric performance are attributed to the enhancement of carrier mobility.
Article
Biophysics
Jiao Ma, Xiaohui Mao, Hongxiao Cong, Xiaoting Li, Jing Sun, Meiling Wang, Hua Wang
Summary: The novel composite hydrogel proposed in this paper serves as a sensing and immobilizing substrate with excellent electrochemical properties and loading capacity. The optimized immunosensor demonstrates high sensitivity and a wide linear range for motilin detection, with low detection limits, making it applicable in practical diagnosis.
BIOSENSORS & BIOELECTRONICS
(2021)
Article
Optics
Yongchao Wang, Yining Zhang, Dongxin Li, Aiqin Zhang, Hua Wang, Husheng Jia, Bingshe Xu
Summary: A novel white-light copolymer has been successfully prepared by bonding fluorescent complexes to a polysiloxane pre-polymer through coordination polymerization. The resulting white light LED device has a CIE color coordinate of (0.327, 0.321) and shows good resistance to UV aging. The copolymer also exhibits an initial decomposition temperature of 235 degrees C, indicating potential applications in near ultraviolet LEDs.
Article
Chemistry, Physical
Min Li, Ziyu Xiong, Shuangshuang Shao, Lin Shao, Su-Ting Han, Hua Wang, Jianwen Zhao
Summary: Developing multifunctional-integrated photoelectric synaptic devices with a simple structure to mimic eye functions is of great importance. This study reported the research on multimodal photoelectric neuromorphic thin film transistors using sorted semiconducting single-walled carbon nanotubes and lead-free perovskite, showing significant improvement in optical and electrical responses. The synaptic devices can emulate various synaptic functionalities, successfully train an artificial neural network for digit recognition, and demonstrate NOR logic and reproducible flash memory functions under optical and electrical programming stimulations.
Article
Materials Science, Multidisciplinary
Gloria Hong, Changfeng Si, Abhishek Kumar Gupta, Claudia Bizzarri, Martin Nieger, Ifor D. W. Samuel, Eli Zysman-Colman, Stefan Brase
Summary: Purely organic thermally activated delayed fluorescence (TADF) emitting materials for OLEDs provide a method to modulate emission color through choice of donor and acceptor units, yet achieving TADF molecules emitting at longer wavelengths with high efficiency remains a challenge.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Changfeng Si, Tao Wang, Abhishek Kumar Gupta, David B. Cordes, Alexandra M. Z. Slawin, Jay S. Siegel, Eli Zysman-Colman
Summary: Corannulene-derived materials have been extensively studied in energy storage and solar cells. However, their potential as emitters in light-emitting sensors and OLEDs has been largely unexplored. In this study, a family of multi-D-A motifs, TCzPhCor, TDMACPhCor, and TPXZPhCor, were developed by using corannulene as the acceptor and different donors. These materials exhibit multiple phosphorescence and show promise in temperature sensing and OLED applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Materials Science, Multidisciplinary
Dianming Sun, Changfeng Si, Tao Wang, Eli Zysman-Colman
Summary: The 1,3,5-triazine electron acceptor is widely used as a building block for thermally activated delayed fluorescence (TADF) materials. It has been proven effective in designing high-efficiency and long-lasting organic light-emitting diodes (OLEDs).
ADVANCED PHOTONICS RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Min Li, Jie Deng, Xin Wang, Shuangshuang Shao, Xiaoqian Li, Weibing Gu, Hua Wang, Jianwen Zhao
Summary: Flexible brain-inspired neuromorphic transistors demonstrate excellent electrical properties and the ability to mimic synaptic plasticity. The behavior of these devices is related to the weight concentration of ionic liquids and they can simulate the inhibitory characteristics of olfactory neurons.
FLEXIBLE AND PRINTED ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Di Zhang, Tingting Yang, Huixia Xu, Yanqin Miao, Runfeng Chen, Ruth Shinar, Joseph Shinar, Hua Wang, Bingshe Xu, Junsheng Yu
Summary: In this study, four novel donor-acceptor compounds were designed and synthesized for non-doped OLEDs, showing excellent performance in terms of maximum luminance, current efficiency, and maximum EQE. The use of BT and TPA-based D-A architectures proved to be effective in obtaining outstanding orange and red emitters.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Xueqiao Li, Na Sun, Zhanfeng Li, Jinbo Chen, Qinjun Sun, Hua Wang, Yuying Hao
Summary: A new asymmetric HTM material Cz-3OMeTAD was successfully synthesized and applied in perovskite solar cells, achieving high efficiency performance. The material exhibited appropriate energy levels and relatively high mobility, facilitating efficient photocharge transfer.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Jingjing Yang, Xing Liu, Zemei Liu, Long Wang, Jing Sun, Zhen Guo, Huixia Xu, Hua Wang, Bo Zhao, Guohua Xie
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
Article
Materials Science, Multidisciplinary
Fei Wang, Jing Sun, Mingli Liu, Huifang Shi, Huili Ma, Wenpeng Ye, Hua Wang, Hongmei Zhang, Zhongfu An, Wei Huang
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
