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
Biochemistry & Molecular Biology
Dovydas Blazevicius, Daiva Tavgeniene, Simona Sutkuviene, Ernestas Zaleckas, Ming-Ruei Jiang, Sujith Sudheendran Swayamprabha, Rohit Ashok Kumar Yadav, Jwo-Huei Jou, Saulius Grigalevicius
Summary: Novel host derivatives containing low molar mass compounds with pyridinyl-carbazole fragments showed promising characteristics in electro-phosphorescent organic light-emitting devices, demonstrating high stability, high glass transition temperatures, and efficient power and current efficiencies in blue and green PhOLEDs.
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
Chemistry, Applied
Vilas Venunath Patil, Junseop Lim, Jun Yeob Lee
Summary: In this study, we propose an asymmetric anthracene-based molecule ATDBT for high efficiency doped and non-doped organic light-emitting diodes (OLEDs). The ATDBT accelerates the triplet to singlet up-conversion process through triplet-triplet annihilation and structurally induced bipolar characteristics. The fabricated devices achieve high efficiency with a small efficiency roll-off at high luminance.
Article
Chemistry, Multidisciplinary
Yong-Jian Yang, Jia-Jia Wei, Xiang-Yang Liu, Runlai Li, Zhen-Ming Zhang
Summary: A series of D-A type host materials with ortho-linking strategy were developed, leading to high-performance OLEDs with high external quantum efficiency and flat efficiency roll-off. Among them, the device hosted by POXTRZ achieved the best performance.
Article
Chemistry, Applied
Chongping Song, Jiaqi Li, Houyu Zhang
Summary: A class of bipolar host molecules with hole-transporting and electron-transporting groups connected to a TPSi core were designed and analyzed for blue phosphorescence. The calculated results showed that these designed molecules have potential as host materials for blue phosphorescence. The position of the N atom in pyridine and carboline plays a significant role in the molecular properties. This study provides insights into the structure-property relationship of TPSi-based host molecules and offers guidance for efficient bipolar host materials for blue phosphorescence.
Article
Materials Science, Multidisciplinary
Chao Tang, Jianmei Chen, Zhenghua Zhu, Changdong Shao, Yong Wang, Youhua Chen, Zijie Zhu, Mingxuan Shi, Yue Jin, Hui Yang, Jiujuan Fu, Yuxin Han, Jiayi Hu, Fangfang Wang, Jia Hu, Xudong Cao, Yuhe Kan, Lili Zhang
Summary: Two carbazole or carbazole-3-carbonitrile/pyridine-based bipolar materials were synthesized as hosts for solution-processed sky-blue PhOLEDs and green TADF-OLEDs. Increasing the doping concentration from 10% to 15% slightly reduced the turn-on voltage of the devices based on 2,6-CzPy. Introduction of cyano substituents improved the thermal stability of the hosts, but also resulted in deeper HOMO levels and larger hole injection barriers in CN-2,6-CzPy, which did not contribute to enhanced device performance.
Article
Materials Science, Multidisciplinary
Yi-Mei Huang, Tse-Ying Chen, Deng-Gao Chen, Hsuan-Chi Liang, Cheng-Ham Wu, Mandy M. Lee, Tien-Lung Chiu, Jiun-Haw Lee, Yu-Cheng Chiu, Pi-Tai Chou, Man-kit Leung
Summary: 35Cbz4BzCN, a novel universal host with long triplet lifetime, can effectively harvest triplet excitons and achieve high efficiency luminescence in combination with different dopants.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Optics
Zhaoyue Lue, Ying Liu, Yichao Jin, Lijiang Zhang, Xiao Wang, Chichong Lu, Guofan Jin
Summary: A symmetrical carbazole-benzonitrile derivative, CzPhFBN, was designed as a host for phosphorescent organic light-emitting diodes (PhOLEDs) based on a para-linkage concept. The CzPhFBN molecule consisted of a cyano (CN) unit and a carbazole (Cz) unit attached to the central phenyl ring at the para positions. The results showed that CzPhFBN had a high triplet energy of over 3.0 eV and exhibited bipolar carrier transporting property.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Physical
Zachary A. VanOrman, Carl R. Conti, Geoffrey F. Strouse, Lea Nienhaus
Summary: The study fills a gap in the field of photon upconversion by introducing CdTe nanorods as a new class of triplet sensitizers for red-to-blue photon upconversion, achieving high efficiency and low threshold power.
CHEMISTRY OF MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Tsz Chung Yiu, Premkumar Gnanasekaran, Wei-Ling Chen, Wei-Han Lin, Ming-Jun Lin, Di-Yan Wang, Chin-Wei Lu, Chih-Hao Chang, Yuan Jay Chang
Summary: This article presents the design and synthesis of deep-blue fluorescent materials and explores their application in organic light-emitting diodes (OLEDs). These materials exhibit high luminescence efficiency and quantum yield, making them suitable for commercial production.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Applied
Sook Hee Jeong, Ho Jin Jang, Jun Yeob Lee
Summary: In this study, wet-process based blue phosphorescent organic light-emitting diodes were developed by utilizing a novel hole transport material, DCDPA, which exhibited high quantum efficiency and low turn on voltage compared to the previous work. This efficient soluble blue device showed promising potential for future optoelectronic applications.
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)
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, Multidisciplinary
Wenkui Wei, Jiuyan Li, Di Liu, Yongqiang Mei, Ying Lan, Houru Tian, Rui Niu, Botao Liu
Summary: The study focused on developing deep blue and pure blue organic light-emitting diodes using a series of donor-acceptor-donor type emitters. The molecular engineering of these emitters led to improved performance, with OLEDs exhibiting emission with specific CIE coordinates and maximum external quantum efficiencies. This research provides a valuable strategy for designing more efficient deep blue emitters in the future.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Jeong Min Choi, Woochul Lee, Kong Kyeom Kim, Jun Yeob Lee
ORGANIC ELECTRONICS
(2017)
Article
Materials Science, Multidisciplinary
Wook Song, Taekyung Kim, Yoonkyoo Lee, Jun Yeob Lee
ORGANIC ELECTRONICS
(2017)
Article
Materials Science, Multidisciplinary
Hyeong Min Kim, Jeong Min Choi, Jun Yeob Lee
ORGANIC ELECTRONICS
(2017)
Article
Materials Science, Multidisciplinary
Wook Song, Jun Yeob Lee
ORGANIC ELECTRONICS
(2017)
Article
Materials Science, Multidisciplinary
Chan Seok Oh, Chang-Ki Moon, Jeong Min Choi, Jin-Suk Huh, Jang-Joo Kim, Jun Yeob Lee
ORGANIC ELECTRONICS
(2017)
Article
Materials Science, Multidisciplinary
Hyeong Min Kim, Jeong Min Choi, Jun Yeob Lee
Review
Materials Science, Multidisciplinary
Wook Song, Jun Yeob Lee
ADVANCED OPTICAL MATERIALS
(2017)
Article
Chemistry, Applied
Kiun Cheong, Seung Chan Kim, Jun Yeob Lee
Summary: This study explores the potential of using o-carborane as a new acceptor in designing donor-acceptor (D-A) type thermally activated delayed fluorescence (TADF) materials. The designed D-A type TADF emitter exhibits deep red emission as proven by delayed fluorescence and electroluminescence analysis. The maximum external quantum efficiency of the devices is found to be 5.2% in the doped device and 2.1% in the non-doped device.
Article
Chemistry, Applied
Ju Hui Yun, Jun Yeob Lee
Article
Chemistry, Applied
Jeong Min Choi, Dong Ryun Lee, Jun Yeob Lee
Article
Nanoscience & Nanotechnology
Sung Yong Byeon, Ji Han Kim, Jun Yeob Lee
ACS APPLIED MATERIALS & INTERFACES
(2017)
Article
Chemistry, Multidisciplinary
Yirang Im, Seong Yong Byun, Ji Han Kim, Dong Ryun Lee, Chan Seok Oh, Kyoung Soo Yook, Jun Yeob Lee
ADVANCED FUNCTIONAL MATERIALS
(2017)
Review
Chemistry, Physical
Yirang Im, Mounggon Kim, Yong Joo Cho, Jeong-A Seo, Kyoung Soo Yook, Jun Yeob Lee
CHEMISTRY OF MATERIALS
(2017)
Article
Chemistry, Multidisciplinary
Jin-Wook Lee, Yung Ji Choi, June-Mo Yang, Sujin Ham, Sang Kyu Jeon, Jun Yeob Lee, Young-Hyun Song, Eun Kyung Ji, Dae-Ho Yoon, Seongrok Seo, Hyunjung Shin, Gil Sang Han, Hyun Suk Jung, Dongho Kim, Nam-Gyu Park
Article
Chemistry, Applied
Yu Jin Kang, Jun Yeob Lee
Article
Chemistry, Applied
Leping Chen, Yanfen Wang, Tingyu Shi, Tiantian Ma, Yang Li, Huayu Qiu, Shouchun Yin, Meier Gu
Summary: This study successfully overcame the limitations of the heavy atom effect by introducing iodine atoms and innovatively enhancing the structure while weakening stacking behavior, achieving high efficiency and precision in photodynamic therapy and photothermal therapy.
Article
Chemistry, Applied
Bingpeng Guo, Honghan Sa, Peng Zhang, Guiwen Hao, Mengyu Li, Qingqing Jiang, Baoying Li, Wei Shu, Changxiang Shao
Summary: The design of ratiometric fluorescence probes with large Stokes shift is of great significance in detecting and imaging target substances in complex organisms. In this study, a novel fluorophore with a large Stokes shift was easily obtained, and a fluorescence probe based on it demonstrated rapid response, high selectivity, and sensitivity towards peroxynitrite. The probe also showed excellent biocompatibility and remarkable mitochondrial targeting ability, making it suitable for proportional imaging of peroxynitrite in living cells and zebrafish.
Review
Chemistry, Applied
Haidong Huang, Xiaohui Wang, Xinyang Li, Yichen Li, Guojin Liu, Lan Zhou, Jianzhong Shao
Summary: This article introduces the application of responsive photonic crystals in anti-counterfeiting technology, with a focus on the preparation principle, classification, and preparation methods.
Article
Chemistry, Applied
Yunpeng Wang, Tao Zhao, Xiaoye Bi, Chencheng Lv
Summary: In this study, three novel carbene dyes were designed to achieve environmentally friendly dyeing processes. The dyes formed covalent bonds with fibers and exhibited good dyeing performance and high color fastness. These findings highlight the potential of the novel carbene dyes in promoting green production in the textile industry.
Review
Chemistry, Applied
Yizhe Yan, Xiaopei Zhu, Jia-Xin Cao, Yuan He, Shaoqing Li, Jian-Yong Wang
Summary: In this paper, 1,3,5-triazine dyes were successfully synthesized and their photophysical properties were studied. Two probes were selected for further investigation, showing promising applications in various fields.
Article
Chemistry, Applied
Xin Hu, Tongsheng Huang, Lihua Chen, Weifeng Zhu, Fengjie Deng, Xiancai Li, Jianwen Tian, Meiying Liu, Xiaoyong Zhang, Yen Wei
Summary: This study presents the synthesis of fluorescent cyclomatrix polyphosphazene spheres with aggregation-induced emission (AIE) feature and biodegradable potential for controlled drug delivery. The resulting micelles exhibit high water dispersibility, desirable fluorescence performance, and high drug loading capacity. They can effectively release the encapsulated drug in physiological solution and show excellent biological imaging ability and cytotoxicity against cancer cells.
Article
Chemistry, Applied
Yanzhu Liu, Yanghui Lei, Dongyan Li, Guangkui Li, Dongping Li, Yongxiu Li
Summary: In this study, luminescent lanthanide nanoparticles were synthesized as a dual emission turn-off probe for detecting 2,6-pyridinedicarboxylic acid (DPA) in water. The nanoparticles showed good dispersion and water stability, and achieved low detection limits for DPA. They also exhibited high recoveries in various samples.
Article
Chemistry, Applied
Jung Jae Do, Jong Ryeol Kwon, Donghan Kim, Jae Woong Jung
Summary: This study presents a defect passivation approach using coumarin dye as a multi-functional passivating agent of perovskite films to boost power conversion efficiency and operating stability of PSCs. The incorporation of coumarin dye improves the film morphology, enhances carrier extraction/transport, and suppresses trap-assisted recombination in the perovskite films. The optimized device demonstrates impressive reliability and practical applicability, maintaining over 90% of its initial PCE after being exposed to continuous indoor lighting irradiation for 2000 hours.
Article
Chemistry, Applied
Gang Wang, Yu-Chang Wang, Jing Lu, Wen-Fu Yan, Juan Jin, Yuan-Peng Wang, Jia-Jia Zhang, Hui-Jie Zhang, Hao Dong, Xi-Guang Liu
Summary: A new Ni(II) compound with good solid-state fluorescence performance and stability was synthesized, and it showed outstanding detection properties for various substances in aqueous solutions. This compound has the potential to be a multifunctional sensor.
Article
Chemistry, Applied
Luyao Wei, Shenglong Shang, Yu Zheng, Jie Liu, Ping Zhu
Summary: This study developed a facile method to create high saturation and durable structural colors on cotton fabrics. The colors are regulated by adjusting the size of magnetic particles and can be conveniently printed on fabrics using photo masks on transparent films.
Article
Chemistry, Applied
Zhao Jiang, Qing Zhang, Zhaoyu Kong, Ruijie Qiao, Zichuan Liu, Linzhou Song, Senqiang Zhu, Rui Liu, Hongjun Zhu
Summary: Three heteroleptic Ir(III) complexes with different electron-donating aryl groups were synthesized and their optical properties were investigated. It was found that all three complexes exhibited aggregation-induced phosphorescence emission (AIPE) behaviors, and the relationship between the size of organic ligands and AIPE behaviors was characterized. Ir-PhCz showed the best imaging of latent fingerprints due to its green light emission and high quantum yield.
Article
Chemistry, Applied
Zhijun Ruan, Chunxia Fan, Xuanrong Wang, Dong Shao, Xiaodong Yang, Wentao He, Tao Xu, Junqi Lin, Zhengfang Tian
Summary: A novel thioketal-based probe has been designed for rapid and accurate detection of mercury (II) ions, showing different fluorescence characteristics in various states. The probe exhibits excellent selectivity and specificity, making it suitable for Hg2+ detection in water solutions.
Article
Chemistry, Applied
Jianjun Huang, Xuan Zhao, Daniel Escudero, Luc Van Meervelt, Dongbin Zheng, Yuyu Fang, Wim Dehaen
Summary: A series of BOAHY compounds were successfully synthesized and showed versatile applications as a platform for designing novel fluorescent probes, especially in selective recognition.
Article
Chemistry, Applied
Roman V. Larkovich, Victoria E. Shambalova, Savva A. Ponomarev, Alexander S. Aldoshin, Boris N. Tarasevich, Konstantin A. Lyssenko, Valentine G. Nenajdenko
Summary: An efficient synthetic protocol for the preparation of novel 1,7-difluorinated BODIPYs was elaborated. Their photophysical properties were studied and the effect of 2,6-substituents was evaluated using DFT calculations.
Article
Chemistry, Applied
Haneul Kim, Byungjin Koo
Summary: In this study, a lithium ion sensing methodology based on fluorinated naphthalene compounds using 19F NMR and UV-vis spectroscopy is reported. The binding of lithium ions to the compounds is confirmed by changes in chemical shifts and peak broadening. Additionally, the effect of different crown ether ring sizes on the binding ability is observed. This study provides a new method for lithium ion sensing using spectroscopy.
