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Gu J, Shi W, Zheng H, Chen G, Wei B, Wong WY. The Novel Organic Emitters for High-Performance Narrow-Band Deep Blue OLEDs. Top Curr Chem (Cham) 2023; 381:26. [PMID: 37632653 DOI: 10.1007/s41061-023-00436-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 08/15/2023] [Indexed: 08/28/2023]
Abstract
Narrow-band deep-blue organic light-emitting diodes (OLEDs) have played a key role in the field of high-quality full-color displays. However, because of the considerable challenges of inherent band gaps, unbalanced carrier injection and the lack of molecular structures, narrow-band deep-blue emitters develop slowly compared with red- and green-emitting materials. Encouragingly, with the continuous efforts of scientists in recent years, great progress has been made in the molecule design and material synthesis of highly efficient narrow-band deep-blue emitters. The typical deep-blue emitters which exhibit narrow emission with a full width at half maximum of < 50 nm are summarized in this article. They are divided into the three categories: fluorescence, phosphorescence and thermally activated delayed fluorescence. The methods of molecular design for realizing narrow-band deep-blue emission are described in detail and future research directions are also discussed in this article.
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Affiliation(s)
- Jialu Gu
- School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, 200444, China
| | - Wei Shi
- School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, 200444, China
| | - Haixia Zheng
- School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, 200444, China
| | - Guo Chen
- School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, 200444, China
| | - Bin Wei
- School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, 200444, China.
| | - Wai-Yeung Wong
- Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, 100872, China.
- Shenzhen Research Institute, The Hong Kong Polytechnic University, Shenzhen, 518057, Guangdong, China.
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Shen Y, Yuan L, Wu G, Yuan W, Cheng Z, Yan J, Zhang J, Tao Y, Yu Z. Microdroplet-Facilitated Assembly of Thermally Activated Delayed Fluorescence-Encoded Microparticles with Non-interfering Color Signals. ACS APPLIED MATERIALS & INTERFACES 2023; 15:591-598. [PMID: 36542734 DOI: 10.1021/acsami.2c18870] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Encoded microparticles (EMPs) have shown demonstrative value for multiplexed high-throughput bioassays such as drug discovery and diagnostics. Herein, we propose for the first time the incorporation of thermally activated delayed fluorescence (TADF) dyes with low-cost, heavy metal-free, and long-lived luminescence properties into polymer matrices via a microfluidic droplet-facilitated assembly technique. Benefiting from the uniform droplet template sizes and polymer-encapsulated structures, the resulting composite EMPs are highly monodispersed, efficiently shield TADF dyes from singlet oxygen, well preserve TADF emission, and greatly increase the delayed fluorescence lifetime. Furthermore, by combining with phase separation of polymer blends in the drying droplets, TADF dyes with distinct luminescent colors can be spatially separated within each EMP. It eliminates optical signal interference and generates multiple fluorescence colors in a compact system. Additionally, in vitro studies reveal that the resulting EMPs show good biocompatibility and allow cells to adhere and grow on the surface, thereby making them promising optically EMPs for biolabeling.
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Affiliation(s)
- Yu Shen
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 30 Puzhu South Road, Nanjing 211816, P. R. China
| | - Lingfeng Yuan
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 30 Puzhu South Road, Nanjing 211816, P. R. China
| | - Guanfu Wu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 30 Puzhu South Road, Nanjing 211816, P. R. China
| | - Wenbo Yuan
- Key Lab for Flexible Electronics & Institute of Advanced Materials (IAM), Nanjing Tech University, 30 Puzhu South Road, Nanjing 211816, P. R. China
| | - Zhengxiang Cheng
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 30 Puzhu South Road, Nanjing 211816, P. R. China
| | - Jing Yan
- Holosensor Medical Ltd., Building 12, 1798 West Zhonghuayuan Road, Suzhou City, Jiangsu 215300, China
| | - Jing Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 30 Puzhu South Road, Nanjing 211816, P. R. China
| | - Youtian Tao
- Key Lab for Flexible Electronics & Institute of Advanced Materials (IAM), Nanjing Tech University, 30 Puzhu South Road, Nanjing 211816, P. R. China
| | - Ziyi Yu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 30 Puzhu South Road, Nanjing 211816, P. R. China
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Li P, Wang Z, Li W, Yuan J, Chen R. Design of Thermally Activated Delayed Fluorescence Materials with High Intersystem Crossing Efficiencies by Machine Learning-Assisted Virtual Screening. J Phys Chem Lett 2022; 13:9910-9918. [PMID: 36256799 DOI: 10.1021/acs.jpclett.2c02735] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Efficient intersystem crossing (ISC) and reverse ISC (RISC) processes are of vital significance for thermally activated delayed fluorescence (TADF) materials to achieve 100% internal quantum efficiency. However, it is challenging to rapidly predict the ISC/RISC rates of large amounts of TADF materials and screen promising candidates because of their flexible molecular design. Here, we perform virtual screening of 564 candidates constructed from 20 unique building blocks linking in D-A, D-π-A, and D-A-D (D') configurations using the established machine learning models of GBRT and RF-GBRT-KNN with the Pearson's correlation coefficients (r) of 0.89 and 0.82, respectively. Novel descriptors of ΔELL, Polar, and ΔETT for predicting ISC/RISC rates were proposed, and nine TADF molecules with the predicted ISC and RISC rates of >7 × 107 and 2 × 105 s-1, respectively, were revealed. We provide an efficient approach to predicting ISC and RISC rates of TADF molecules on a large scale, elucidating important building blocks and architectures to design high-performance optoelectronic materials for experimental explorations.
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Affiliation(s)
- Ping Li
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing210023, China
| | - Zijie Wang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing210023, China
| | - Wenjing Li
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing210023, China
| | - Jie Yuan
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing210023, China
| | - Runfeng Chen
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing210023, China
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Li K, Wang T, Yao B, Chen Y, Deng H, Zhan H, Xie Z, Cheng Y. Carbazole ring: A delicate rack for constructing thermally activated delayed fluorescent compounds with through-space charge transfer. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.05.054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Hu X, Qin Y, Li Z, Gao H, Gao T, Liu G, Dong X, Tian N, Gu X, Lee CS, Wang P, Wang Y. Nearly 100% exciton utilization in highly efficient red OLEDs based on dibenzothioxanthone acceptor. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.12.047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Jin JL, Ding X, Chen YD, Yang JF, Ou LH, Gao Y, Wu Y. Theoretical studies on phthalimide-based efficient thermally activated delayed fluorescence emitters. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138750] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Karthik D, Jung YH, Lee H, Hwang S, Seo BM, Kim JY, Han CW, Kwon JH. Acceptor-Donor-Acceptor-Type Orange-Red Thermally Activated Delayed Fluorescence Materials Realizing External Quantum Efficiency Over 30% with Low Efficiency Roll-Off. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2007724. [PMID: 33792077 DOI: 10.1002/adma.202007724] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 02/05/2021] [Indexed: 06/12/2023]
Abstract
Two new orange-red thermally activated delayed fluorescence (TADF) materials, PzTDBA and PzDBA, are reported. These materials are designed based on the acceptor-donor-acceptor (A-D-A) configuration, containing rigid boron acceptors and dihydrophenazine donor moieties. These materials exhibit a small ΔEST of 0.05-0.06 eV, photoluminescence quantum yield (PLQY) as high as near unity, and short delayed exciton lifetime (τd ) of less than 2.63 µs in 5 wt% doped film. Further, these materials show a high reverse intersystem crossing rate (krisc ) on the order of 106 s-1 . The TADF devices fabricated with 5 wt% PzTDBA and PzDBA as emitting dopants show maximum EQE of 30.3% and 21.8% with extremely low roll-off of 3.6% and 3.2% at 1000 cd m-2 and electroluminescence (EL) maxima at 576 nm and 595 nm, respectively. The low roll-off character of these materials is analyzed by using a roll-off model and the exciton annihilation quenching rates are found to be suppressed by the fast krisc and short delayed exciton lifetime. These devices show operating device lifetimes (LT50 ) of 159 and 193 h at 1000 cd m-2 for PzTDBA and PzDBA, respectively. The high efficiency and low roll-off of these materials are attributed to the good electronic properties originatng from the A-D-A molecular configuration.
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Affiliation(s)
- Durai Karthik
- Organic Optoelectronic Device Lab. (OODL), Department of Information Display, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea
| | - Young Hun Jung
- Organic Optoelectronic Device Lab. (OODL), Department of Information Display, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea
| | - Hyuna Lee
- Organic Optoelectronic Device Lab. (OODL), Department of Information Display, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea
| | - Soonjae Hwang
- Organic Optoelectronic Device Lab. (OODL), Department of Information Display, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea
| | - Bo-Min Seo
- LG Display R & D center, LG Science park, 30, Magokjungang 10-ro, Gangseo-gu, Seoul, 07796, Republic of Korea
| | - Jun-Yun Kim
- LG Display R & D center, LG Science park, 30, Magokjungang 10-ro, Gangseo-gu, Seoul, 07796, Republic of Korea
| | - Chang Wook Han
- LG Display R & D center, LG Science park, 30, Magokjungang 10-ro, Gangseo-gu, Seoul, 07796, Republic of Korea
| | - Jang Hyuk Kwon
- Organic Optoelectronic Device Lab. (OODL), Department of Information Display, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea
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Quinoline-based aggregation-induced delayed fluorescence materials for highly efficient non-doped organic light-emitting diodes. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.07.041] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Tigreros A, Portilla J. Recent progress in chemosensors based on pyrazole derivatives. RSC Adv 2020; 10:19693-19712. [PMID: 35515469 PMCID: PMC9054117 DOI: 10.1039/d0ra02394a] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 05/19/2020] [Indexed: 12/16/2022] Open
Abstract
Colorimetric and fluorescent probes based on small organic molecules have become important tools in modern biology because they provide dynamic information concerning the localization and quantity of the molecules and ions of interest without the need for genetic engineering of the sample. In the past five years, these probes for ions and molecules have attracted great attention because of their biological, environmental and industrial significance combined with the simplicity and high sensitivity of absorption and fluorescence techniques. Moreover, pyrazole derivatives display a number of remarkable photophysical properties and wide synthetic versatility superior to those of other broadly used scaffolds. This review provides an overview of the recent (2016-2020) findings on chemosensors containing pyrazole derivatives (pyrazoles, pyrazolines and fused pyrazoles). The discussion focuses on the design and physicochemical properties of chemosensors in order to realize their full potential for practical applications in environmental and biological monitoring (sensing of metal ions, anions, explosives, and biomolecules). We also present our conclusions and outlook for the future.
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Affiliation(s)
- Alexis Tigreros
- Department of Chemistry, Bioorganic Compounds Research Group, Universidad de los Andes Carrera 1 No. 18A-10 Bogotá 111711 Colombia
| | - Jaime Portilla
- Department of Chemistry, Bioorganic Compounds Research Group, Universidad de los Andes Carrera 1 No. 18A-10 Bogotá 111711 Colombia
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Zhou D, Zhang B, Yu Z, Liao Q, Fu H. tert-Butyl-substituted bicarbazole as a bipolar host material for efficient green and yellow PhOLEDs. NEW J CHEM 2020. [DOI: 10.1039/d0nj01210f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We designed a novel bipolar host material with a high ET and thermal stability for multi-colour PhOLEDs.
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Affiliation(s)
- Dandan Zhou
- School of Science
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Bingqian Zhang
- Beijing Key Laboratory for Optical Materials and Photonic Devices
- Department of Chemistry
- Capital Normal University
- Beijing 100048
- P. R. China
| | - Zhenyi Yu
- School of Science
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Qing Liao
- Beijing Key Laboratory for Optical Materials and Photonic Devices
- Department of Chemistry
- Capital Normal University
- Beijing 100048
- P. R. China
| | - Hongbing Fu
- School of Science
- Tianjin University
- Tianjin 300072
- P. R. China
- Beijing Key Laboratory for Optical Materials and Photonic Devices
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