Article
Biochemistry & Molecular Biology
Gaozhan Xie, Jiangchao Wang, Yang Cao, Xudong Xue, Xiao Zhang, Chang Liu, Huanhuan Li, Ye Tao, Runfeng Chen
Summary: Three phosphine sulfide-based bipolar host materials, CzPhPS, DCzPhPS, and TCzPhPS, were synthesized with excellent thermal stability and high ET levels for blue PhOLEDs applications. Among them, CzPhPS exhibited the best performance in blue PhOLEDs, while DCzPhPS and TCzPhPS showed inferior device performance possibly due to enhanced hole-transporting ability from increased carbazole units.
Article
Materials Science, Multidisciplinary
Junsu Ha, Junseop Lim, Jun Yeob Lee
Summary: The use of a mCBP:CzBFPmSi mixed host in PhOLEDs results in high external quantum efficiency over 20% and low efficiency roll-off.
SCIENCE CHINA-MATERIALS
(2022)
Article
Chemistry, Applied
Baeksang Sung, Seonjeong Lee, Chul Woong Joo, Dasol Kim, Jonghee Lee, Yun-Hi Kim
Summary: A novel thermally stable host material, Si-IDCz, has been reported for blue phosphorescent organic light-emitting diodes. Si-IDCz exhibits a high glass transition temperature and a rigid silicon core, which contribute to its high performance and stability.
Article
Engineering, Environmental
Ju Hui Yun, Kyung Hyung Lee, Won Jae Chung, Jun Yeob Lee, Yoonkyoo Lee, Jae Jin Lyu
Summary: High-performance deep blue phosphorescent organic light-emitting diodes were developed using a thermally activated delayed fluorescence type exciplex host, resulting in improved external quantum efficiency and lifetime compared to state-of-the-art mixed host materials. The exciplex host achieved high efficiency and deep blue color coordinates in the solid-state device.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Applied
Rajendra Kumar Konidena, Won Jae Chung, Jun Yeob Lee
Summary: In this study, two new high triplet energy bipolar host materials, CzBPCN and CNCzBPCN, were developed by modifying carbazole building blocks with cyano substitutions. The materials exhibited high triplet energy and good bipolar charge transporting features. The CNCzBPCN hosted device showed significantly improved performance with higher external quantum efficiency and extended operational lifetime compared to the CzBPCN hosted device.
Article
Optics
Bo-Yen Lin, Chia-Hsun Chen, Tzu-Chan Lin, Jiun-Haw Lee, Tien-Lung Chiu
Summary: The carrier recombination and exciton formation zones in blue PHOLEDs depend on the carrier mobility of CTLs and the layer thickness, especially the carrier mobility; ETLs with high electron mobility result in lower driving voltage in blue PHOLEDs than HTLs with high hole mobility.
Article
Chemistry, Multidisciplinary
Yanliang Liu, Luozheng Zhang, Shi Chen, Chang Liu, Yaru Li, Jiawen Wu, Deng Wang, Zhengyan Jiang, Yan Li, Yang Li, Xingzhu Wang, Baomin Xu
Summary: The use of a new water-soluble conjugated polyeletrolyte TB(MA) as a hole transporting layer showed improved compatibility between the charge transporting layer and perovskite film, leading to efficient sky-blue PeLEDs with high external quantum efficiency.
Article
Optics
Qi Zhu, Liang Zhou, Weiqiang Liu, Yingjie Cui, Ruixia Wu, Jiahai Wang, Qingduo Duanmu
Summary: An efficient blue organic electroluminescent device was achieved by optimizing the double light-emitting layers structure, selecting appropriate host materials, and adjusting the doping concentration. The device exhibited good thermal stability and high current efficiency, making it a promising candidate for practical applications in the field of optoelectronics.
OPTICS AND LASER TECHNOLOGY
(2021)
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
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
Chaoke Liu, Tengyue Li, Mizhen Sun, Mingliang Xie, Yannan Zhou, Wenjuan Feng, Qikun Sun, Shi-Tong Zhang, Shanfeng Xue, Wenjun Yang
Summary: Novel host materials PPI22PPPBO and PPI33PPPBO are designed with appropriate triplet energy levels (E-T) for phosphorescent organic light emitting diodes (PhOLEDs), leading to low turn-on voltages and high external quantum efficiency (EQE). Particularly, PPI33PPPBO demonstrates ordered face-to-face stacking, improving carrier mobility and reducing efficiency roll-offs. This study presents the first application of PBO in PhOLED host materials using a twisted connection method.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sujith Sudheendran Swayamprabha, Gintare Krucaite, Deepak Kumar Dubey, Kiran Kishore Kesavan, Joydip De, Mangey Ram Nagar, Hsun Lee, Simona Sutkuviene, Santanu Pal, Sun-Zen Chen, Raminta Beresneviciute, Saulius Grigalevicius, Jwo-Huei Jou
Summary: Solution processable hole transporting materials (HTMs) play a crucial role in the cost-effective production of large-area organic light emitting diodes (OLEDs). The synthesized fluorene-based HTMs exhibited exceptional solubility, thermal stability, suitable molecular energy level alignment, and high triplet energies, making them promising candidates for high-efficiency OLED devices. The solution-processed yellow phosphorescent OLEDs utilizing these HTMs showed improved current efficiency and external quantum efficiency compared to reference devices, suggesting their potential in OLED technology.
Article
Nanoscience & Nanotechnology
Daqing Zhang, Changting Wei, Xiansheng Li, Shiyan Guo, Xin Luo, Xin Jin, Haitao Zhou, Jinhai Huang, Jianhua Su, Bo Xu
Summary: This study designed and synthesized three novel small-molecule hole-transporting materials, and found that HTM-X6 exhibited excellent solvent resistance, leading to an improved external quantum efficiency in Pe-QLEDs.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Vijaya Gopalan Sree, Chinna Bathula, Hae-Kyung Youi, Hyun-Seok Kim, Jung Inn Sohn, Hyunsik Im
Summary: Organic small molecules are essential in OLED technology, with a focus on stability improvement. IMzN and IMzB have been successfully utilized as hole-transporting materials in OLED devices, showing superior performance compared to commercially used materials.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Rajendra Kumar Konidena, Junseop Lim, Jun Yeob Lee
Summary: A new molecular design based on carbazole was developed for the development of high triplet energy bipolar host materials for blue PhOLEDs. Two new isomeric host materials were synthesized, showing high triplet energy without compromising bipolar charge transporting property. The compounds demonstrated good performance in blue PhOLEDs applications, with higher EQE, current efficiency, and efficiency roll off compared to their analogues.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Mingyang Wei, Ke Xiao, Grant Walters, Renxing Lin, Yongbiao Zhao, Makhsud I. Saidaminov, Petar Todorovic, Andrew Johnston, Ziru Huang, Haijie Chen, Aidong Li, Jia Zhu, Zhenyu Yang, Ya-Kun Wang, Andrew H. Proppe, Shana O. Kelley, Yi Hou, Oleksandr Voznyy, Hairen Tan, Edward H. Sargent
ADVANCED MATERIALS
(2020)
Article
Optics
Liang Gao, Li Na Quan, F. Pelayo Garcia de Arquer, Yongbiao Zhao, Rahim Munir, Andrew Proppe, Rafael Quintero-Bermudez, Chengqin Zou, Zhenyu Yang, Makhsud I. Saidaminov, Oleksandr Voznyy, Sachin Kinge, Zhenghong Lu, Shana O. Kelley, Aram Amassian, Jiang Tang, Edward H. Sargent
Correction
Optics
Liang Gao, Li Na Quan, F. Pelayo de Arquer, Yongbiao Zhao, Rahim Munir, Andrew Proppe, Rafael Quintero-Bermudez, Chengqin Zou, Zhenyu Yang, Makhsud I. Saidaminov, Oleksandr Voznyy, Sachin Kinge, Zhenghong Lu, Shana O. Kelley, Aram Amassian, Jiang Tang, Edward H. Sargent
Article
Chemistry, Multidisciplinary
Antoine Dumont, Kevin Ho, Hao-Ting Kung, Chenyue Qiu, Peicheng Li, Deying Luo, Yongbiao Zhao, Gilbert Walker, Zheng-Hong Lu
ADVANCED MATERIALS INTERFACES
(2020)
Article
Chemistry, Physical
Haoran Wang, Xiwen Gong, Dewei Zhao, Yong-Biao Zhao, Sheng Wang, Jianfeng Zhang, Lingmei Kong, Bin Wei, Rafael Quintero-Bermudez, Oleksandr Voznyy, Yuequn Shang, Zhijun Ning, Yanfa Yan, Edward H. Sargent, Xuyong Yang
Article
Materials Science, Multidisciplinary
Han-Nan Yang, Shou-Jie He, Tao Zhang, Jia-Xiu Man, Yongbiao Zhao, Nan Jiang, Deng-Ke Wang, Zheng-Hong Lu
Summary: The orientation of organic molecules in physical-vapor deposited films varies drastically depending on thickness, as does the thermal stability of the molecular network. A simple function to quantify the molecular dipole orientation as a function of film thickness has been proposed, which is found to describe experimental data well. Additionally, the molecular orientation parameter is found to impact material density changes after thermal anneal and glass transition.
ORGANIC ELECTRONICS
(2021)
Article
Physics, Condensed Matter
Juntao Hu, Dengke Wang, Peicheng Li, Nan Chen, Tao Zhang, Yan Wu, Di Wu, Yongbiao Zhao, Qiang Zhu, Zewei Fu, Zheng-Hong Lu
Summary: This study used X-ray and ultraviolet photoelectron spectroscopy to analyze the impact of gas cluster ion beam (GCIB) on organic semiconductors. It was found that UPS is highly sensitive to ion beam bombardment, while XPS core levels show minimal changes. The use of a 4 keV 2000 argon ion cluster can produce a fresh damage-free organic surface for measuring the chemical and electronic structures of stacked films.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2021)
Article
Chemistry, Physical
Lei-Ming Yu, Jia-Xiu Man, Tao Chen, Deying Luo, Juan Wang, Hannan Yang, Yong-Biao Zhao, Hai Wang, Yu Yang, Zheng-Hong Lu
Summary: The study demonstrates that PV panels can be colored by modifying the optical refractive index of the PEDOT:PSS films, with proper doping material selection being crucial. By utilizing polymer/Si heterojunction test cells, researchers successfully developed silicon heterojunction solar cells with colors across the entire visible spectrum while maintaining high power conversion efficiency.
Article
Chemistry, Multidisciplinary
Qianqian Wu, Xiwen Gong, Dewei Zhao, Yong-Biao Zhao, Fan Cao, Haoran Wang, Sheng Wang, Jianhua Zhang, Rafael Quintero-Bermudez, Edward H. Sargent, Xuyong Yang
Summary: A newly developed interconnecting layer in tandem QLEDs has lead to record efficiencies in light emission, preventing charge imbalance and solvent damage and achieving high levels of external quantum efficiency. This interconnecting layer covers emission wavelengths from blue to red light, allowing for high performance light emission.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Linyuan Lian, Song Wang, Huaiyi Ding, Guijie Liang, Yong-Biao Zhao, Haisheng Song, Xinzheng Lan, Jianbo Gao, Rong Chen, Daoli Zhang, Jianbing Zhang
Summary: A unique organic copper iodide material with dual-band white-light emission covering the entire visible spectrum, high PLQE, and excellent CRI has been developed. Nanocrystals with similar optical properties as single crystals were successfully synthesized. Detailed photophysical studies revealed the origin and temperature dependence of the dual-band emission.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yan Wu, Juntao Hu, Zhenxin Yang, Dengke Wang, Yong-Biao Zhao, Tao Zhang, Nan Chen, Di Wu, Zheng-Hong Lu
Summary: In this study, two distinct types of interfaces formed between MoO3 and different organic semiconductors have been discovered: sharp interfaces (type-I) formed on organic semiconductors with high glass transition temperatures, and mixed interfaces (type-II) formed on organic semiconductors with low glass transition temperatures.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Multidisciplinary Sciences
Lingmei Kong, Jialong Wu, Yunguo Li, Fan Cao, Feijiu Wang, Qianqian Wu, Piaoyang Shen, Chengxi Zhang, Yun Luo, Lin Wang, Lyudmila Turyanska, Xingwei Ding, Jianhua Zhang, Yongbiao Zhao, Xuyong Yang
Summary: This study reports highly efficient QLEFETs with an external quantum efficiency (EQE) of over 20% by employing a dielectric-QDs-dielectric (DQD) sandwich structure. The DQD structure controls carrier behavior and shifts the exciton recombination zone into the emissive layer, resulting in enhanced radiative recombination and preventing exciton loss and luminescence quenching.
Article
Chemistry, Physical
Linyuan Lian, Wei Qi, Huaiyi Ding, Hao Tian, Qi Ye, Yong-Biao Zhao, Long Zhao, Jianbo Gao, Daoli Zhang, Jianbing Zhang
Summary: In this study, we report two highly luminescent zero-dimensional organic-inorganic lead-free metal halide hybrids as efficient beta-ray scintillators. These hybrid scintillators combine the superior properties of organic and inorganic components, exhibiting high luminescence efficiency and linear response to beta-ray dose rate, as well as robust radiation resistance.
Article
Materials Science, Multidisciplinary
Linyuan Lian, Tongjin Zhang, Huaiyi Ding, Peng Zhang, Xiuwen Zhang, Yong-Biao Zhao, Jianbo Gao, Daoli Zhang, Yong Sheng Zhao, Jianbing Zhang
Summary: Zero-dimensional copper-based metal halides have shown great potential as luminescent materials with structural tunability and impressive emission properties. The highly luminescent organic copper halide (PTMA)3Cu3I6 exhibits a broadband yellow emission with a high photoluminescence quantum efficiency, making it a promising material for low-loss optical waveguides.
ACS MATERIALS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Lei Chen, Xuehan He, Yongbiao Zhao
Summary: Three 2,1,3-naphthodiazole-based red emissive model compounds were synthesized in this study, with RMC2 showing a pure red peak emission at 625 nm and high fluorescence quantum efficiency. Red OLEDs based on RMC2 demonstrate high efficiency and cost-effective features.
MATERIALS ADVANCES
(2021)