1
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Kumar K. Charge transporting and thermally activated delayed fluorescence materials for OLED applications. Phys Chem Chem Phys 2024; 26:3711-3754. [PMID: 38221898 DOI: 10.1039/d3cp03214k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
The design and synthesis of effective charge transporting (CT) and thermally activated delayed fluorescence (TADF) materials are in high demand to obtain high-performing OLED devices. Recently, the significant development in the field of OLEDs has led to the creation of numerous charge transporting and TADF materials with diverse structures. To further improve the device performance, a better understanding of the structural characteristics and structure-property relationships of these materials is essential. Moreover, to enhance the efficiency of OLEDs, all the electrogenerated excitons should be constrained in EMLs. The TADF mechanism can theoretically register 100% IQE through a potent up-conversion method from non-radiative triplet excitons to radiative singlet excitons. In this review, the structural importance, classification, physical properties, and electroluminescence data of some recent charge transporting and TADF materials are summarized and discussed. Moreover, their molecular structural dependence on functional groups and linkers is classified, which can enhance their charge transporting or emitting ability. To offer a potential roadmap for the further development of charge transporting and TADF materials, it is hoped that this study will encourage researchers to acknowledge their important role in OLEDs.
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Affiliation(s)
- Krishan Kumar
- School of Chemical Sciences, IIT Mandi, Himachal Pradesh 175075, India.
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2
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Siddiqui I, Kumar S, Tsai YF, Gautam P, Shahnawaz, Kesavan K, Lin JT, Khai L, Chou KH, Choudhury A, Grigalevicius S, Jou JH. Status and Challenges of Blue OLEDs: A Review. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2521. [PMID: 37764550 PMCID: PMC10536903 DOI: 10.3390/nano13182521] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 09/04/2023] [Accepted: 09/05/2023] [Indexed: 09/29/2023]
Abstract
Organic light-emitting diodes (OLEDs) have outperformed conventional display technologies in smartphones, smartwatches, tablets, and televisions while gradually growing to cover a sizable fraction of the solid-state lighting industry. Blue emission is a crucial chromatic component for realizing high-quality red, green, blue, and yellow (RGBY) and RGB white display technologies and solid-state lighting sources. For consumer products with desirable lifetimes and efficiency, deep blue emissions with much higher power efficiency and operation time are necessary prerequisites. This article reviews over 700 papers covering various factors, namely, the crucial role of blue emission for full-color displays and solid-state lighting, the performance status of blue OLEDs, and the systematic development of fluorescent, phosphorescent, and thermally activated delayed fluorescence blue emitters. In addition, various challenges concerning deep blue efficiency, lifetime, and approaches to realizing deeper blue emission and higher efficacy for blue OLED devices are also described.
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Affiliation(s)
- Iram Siddiqui
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Sudhir Kumar
- Institute for Chemical and Bioengineering, ETH Zürich, 8093 Zürich, Switzerland
| | - Yi-Fang Tsai
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Prakalp Gautam
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Shahnawaz
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Kiran Kesavan
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Jin-Ting Lin
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Luke Khai
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Kuo-Hsien Chou
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Abhijeet Choudhury
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Saulius Grigalevicius
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, LT-50254 Kaunas, Lithuania
| | - Jwo-Huei Jou
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
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3
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Kotowicz S, Tavgeniene D, Beresneviciute R, Zaleckas E, Krucaite G, Katarzyna Pająk A, Korzec M, Grzegorz Małecki J, Lipiński M, Grigalevicius S, Schab-Balcerzak E. Effect of substituent structure in fluorene based compounds: Experimental and theoretical study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 300:122832. [PMID: 37290242 DOI: 10.1016/j.saa.2023.122832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 04/27/2023] [Accepted: 05/05/2023] [Indexed: 06/10/2023]
Abstract
Fluorene-based low molar weight derivatives were synthesized in Suzuki reactions by using key starting materials 9-benzylidene-2,7-dibromofluorene or 3-(2,7-dibromofluoren-9-ylmethylen)-9-ethylcarbazole and various aryl boronic acids. Photophysical properties of the compounds were investigated in different solutions as well as in solid state. The thermal investigations showed that the obtained compounds are highly thermally stable with temperatures of 5% mass loss (T5%) in the range of 311-432 °C. Some of the compounds also exhibited very high glass transition temperatures exceeding 125 °C. The presented molecules were electrochemically active and showed the energy band gap below 2.97 eV. The investigations were supported by DFT calculations and the photovoltaic ability of the presented compounds was tested in the organic-inorganic solar cells.
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Affiliation(s)
- Sonia Kotowicz
- Institute of Chemistry, University of Silesia, 9 Szkolna Str., 40-006 Katowice, Poland
| | - Daiva Tavgeniene
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenuplentas 19, LT50254 Kaunas, Lithuania
| | - Raminta Beresneviciute
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenuplentas 19, LT50254 Kaunas, Lithuania
| | - Ernestas Zaleckas
- Vytautas Magnus University, Agriculture Academy, Department of Agricultural Engineering and Safety, Studentu str. 11, LT-53361 Akademija, Kaunas Distr., Lithuania
| | - Gintare Krucaite
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenuplentas 19, LT50254 Kaunas, Lithuania
| | - Agnieszka Katarzyna Pająk
- Institute of Chemistry, University of Silesia, 9 Szkolna Str., 40-006 Katowice, Poland; Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34 M. Curie- Sklodowska Str., 41-819 Zabrze, Poland
| | - Mateusz Korzec
- Institute of Chemistry, University of Silesia, 9 Szkolna Str., 40-006 Katowice, Poland
| | - Jan Grzegorz Małecki
- Institute of Chemistry, University of Silesia, 9 Szkolna Str., 40-006 Katowice, Poland
| | - Marek Lipiński
- Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 22 Krakowska, 43-340 Kozy, Poland
| | - Saulius Grigalevicius
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenuplentas 19, LT50254 Kaunas, Lithuania.
| | - Ewa Schab-Balcerzak
- Institute of Chemistry, University of Silesia, 9 Szkolna Str., 40-006 Katowice, Poland; Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34 M. Curie- Sklodowska Str., 41-819 Zabrze, Poland.
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4
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Girase JD, Shahnawaz, Jou J, Vaidyanathan S. Deep‐blue Fluorophores Based on Phenanthroimidazole Integrated with Benzo[
d
]thiazole: Experimental and Theoretical Investigation. ChemistrySelect 2022. [DOI: 10.1002/slct.202201514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jaipal D. Girase
- Department of Chemistry National Institute of Technology Rourkela 769008 Odisha India
| | - Shahnawaz
- Department of Materials Science and Engineering National Tsing Hua University Hsinchu 30013, Taiwan R.O.C
| | - Jwo‐Huei Jou
- Department of Materials Science and Engineering National Tsing Hua University Hsinchu 30013, Taiwan R.O.C
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Sudyoadsuk T, Funchien P, Petdee S, Loythaworn T, Chasing P, Waengdongbung W, Saenubol A, Hadsadee S, Jungsuttiwong S, Promarak V. Benzothiadiazole-based fluorophores as efficient non-doped emitters for solution-processed organic light-emitting diodes. NEW J CHEM 2022. [DOI: 10.1039/d2nj04354h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
New HLCT fluorophores are synthesized and successfully applied as non-doped emissive layers in solution-processed double-layered OLEDs. These devices exhibit intense yellow-green emission colors with superior performance.
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Affiliation(s)
- Taweesak Sudyoadsuk
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Patteera Funchien
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Sujinda Petdee
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Thidarat Loythaworn
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Pongsakorn Chasing
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Wijitra Waengdongbung
- Research Network of NANOTEC-VISTEC on Nanotechnology for Energy, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Atthapon Saenubol
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Sarinya Hadsadee
- Department of Chemistry, Faculty of Science, Ubon Ratchathani University, Warinchumrap, Ubon Ratchathani 34190, Thailand
| | - Siriporn Jungsuttiwong
- Department of Chemistry, Faculty of Science, Ubon Ratchathani University, Warinchumrap, Ubon Ratchathani 34190, Thailand
| | - Vinich Promarak
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
- Research Network of NANOTEC-VISTEC on Nanotechnology for Energy, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
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6
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Chawanpunyawat T, Chasing P, Nalaoh P, Maitarad P, Sudyodsuk T, Promarak V. Rational Design of Chrysene-Based Hybridized Local and Charge-Transfer Molecules as Efficient Non-Doped Deep-Blue Emitters for Simple-Structured Electroluminescent Devices. Chem Asian J 2021; 16:4145-4154. [PMID: 34716663 DOI: 10.1002/asia.202101154] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 10/29/2021] [Indexed: 01/12/2023]
Abstract
Herein, we present a molecular design of chrysene-based deep-blue emissive materials (TC, TpPC, TpXC, and TmPC), in which chrysene as a core is functionalized with different triphenylamine moieties to realize a fine-tuning deep-blue fluorescence with superior electroluminescent (EL) performance. The photophysical analyses and density functional theory (DFT) calculations disclose that TC, TpPC, and TpXC possess HLCT characteristics with intense deep-blue emission in the solid-state, good hole-transporting ability, and high thermal and electrochemical stabilities. They are successfully employed as non-doped emitters in simple structured OLEDs (ITO/PEDOT : PSS : NF/emitter/TPBi/LiF : Al). In particular, TC-based device emits a deep-blue light with an emission peak at 446 nm and CIE color coordinates of (0.148, 0.096), a maximum external quantum efficiency (EQEmax ) of 4.31%, and a low turn-on voltage of 2.8 V.
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Affiliation(s)
- Thanyarat Chawanpunyawat
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
| | - Pongsakorn Chasing
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
| | - Phattananawee Nalaoh
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
| | - Phornphimon Maitarad
- Research Center of Nano Science and Technology, Shanghai University, Shanghai, 200444, P. R. China
| | - Taweesak Sudyodsuk
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
| | - Vinich Promarak
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand.,Research Network of NANOTEC-VISTEC on Nanotechnology for Energy School of Molecular Science and Engineering Department, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
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7
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Kumar K, Kesavan KK, Thakur D, Banik S, Jayakumar J, Cheng CH, Jou JH, Ghosh S. Functional Pyrene-Pyridine-Integrated Hole-Transporting Materials for Solution-Processed OLEDs with Reduced Efficiency Roll-Off. ACS OMEGA 2021; 6:10515-10526. [PMID: 34056206 PMCID: PMC8153793 DOI: 10.1021/acsomega.0c04080] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 12/15/2020] [Indexed: 06/12/2023]
Abstract
A series of new functional pyridine-appended pyrene derivatives, viz., 2,6-diphenyl-4-(pyren-1-yl)pyridine (Py-03), 2,6-bis(4-methoxyphenyl)-4-(pyren-1-yl)pyridine (Py-MeO), 4-(pyren-1-yl)-2,6-di-p-tolylpyridine (Py-Me), and 2,6-bis(4-bromophenyl)-4-(pyren-1-yl)pyridine (Py-Br) were designed, developed, and studied as the hole-transporting materials (HTMs) for organic light-emitting diode (OLED) application. The crystal structures of two molecules revealed to have a large dihedral angle between the pyrene and pyridine units, indicating poor π-electronic communication between them due to ineffective orbital overlap across the pyrene-pyridine systems as the two p-orbitals of pivotal atoms are twisted at 66.80° and 68.75° angles to each other in Py-03 and Py-Me, respectively. The influence of variedly functionalized pyridine units on the electro-optical properties and device performance of the present integrated system for OLED application was investigated. All of the materials have suitable HOMO values (5.6 eV) for hole injection by closely matching the HOMOs of indium tin oxide (ITO) and the light-emitting layer. All of the synthesized molecules have suitable triplet energies, glass transition temperatures, and melting temperatures, which are highly desirable for good HTMs. The pyrene-pyridine-based devices demonstrated stable performance with low-efficiency roll-off. The device with Py-Br as HTM showed a maximum luminance of 17300 cd/m2 with a maximum current efficiency of 22.4 cd/A and an EQE of 9% at 3500 cd/m2 with 7% roll-off from 1000 to 10 000 cd/m2. Also, the devices with Py-Me and Py-03 showed performance roll-up while moving from 1000 to 10 000 cd/m2.
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Affiliation(s)
- Krishan Kumar
- School
of Basic Sciences, IIT Mandi, Mandi, Himachal Pradesh 175005, India
| | - Kiran Kishore Kesavan
- Department
of Materials Science and Engineering, National
Tsing Hua University, 101, Sec. 2, Guang-Fu Road, Hsinchu 30013, Taiwan, R.O.C.
| | - Diksha Thakur
- School
of Basic Sciences, IIT Mandi, Mandi, Himachal Pradesh 175005, India
| | - Subrata Banik
- Department
of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613401, Tamil Nadu, India
| | | | - Chien-Hong Cheng
- Department
of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan, R.O.C.
| | - Jwo-Huei Jou
- Department
of Materials Science and Engineering, National
Tsing Hua University, 101, Sec. 2, Guang-Fu Road, Hsinchu 30013, Taiwan, R.O.C.
| | - Subrata Ghosh
- School
of Basic Sciences, IIT Mandi, Mandi, Himachal Pradesh 175005, India
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Jafari S, Izadi Z, Alaei L, Jaymand M, Samadian H, Kashani VO, Derakhshankhah H, Hayati P, Noori F, Mansouri K, Moakedi F, Janczak J, Soltanian Fard MJ, Fayaz Bakhsh N. Human plasma protein corona decreases the toxicity of pillar-layer metal organic framework. Sci Rep 2020; 10:14569. [PMID: 32884004 PMCID: PMC7471913 DOI: 10.1038/s41598-020-71170-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 08/11/2020] [Indexed: 02/01/2023] Open
Abstract
This scenario was designed to investigate the protein corona pattern on the pillar-layer surface of a Cu-based metal–organic framework (MOF) in human plasma. The [Cu(L)(L/)].1.3DMA (MOF-1) {L = 4, 4/-bipyridine and L/ = 5-aminoisophthalic acid}, was synthesized through the sonochemical irradiation approach as well as characterized by various techniques like scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray powder diffraction and single-crystal X-ray diffraction. The space group was determined to be an orthorhombic space group (Pbam) by single-crystal X-ray diffraction. Single-crystal X-ray analyses on MOF-1 showed that Cu+2 ion was 6-coordinated. Besides, to study and clarify interactions between MOFs and biological milieu, human whole blood plasma was selected as a model. Fluorescence spectroscopy and SDS-PAGE techniques were employed to explore quantitative and qualitative in situ characterization of protein corona as well. Furthermore, cell viability in a cancerous cell lines was evaluated by MTT assay in the presence and absence of the corona. The results from SDS-PAGE illustrated that the most adsorbed quantity among plasma proteins belongs to fibrinogen (α, β and γ chains), and this protein showed the maximum frequency on the MOF-1s surface, so the possible interactions of MOF-1s with fibrinogen also studied using fluorescence spectroscopy and corresponding data were plotted. According to the obtained data from MTT assay, these structures have concentration-dependent toxicity. In brief, based on the obtained data in the current study, the designed MOF can be introduced as a new desirable carrier for drug/gen delivery after further prerequisite assessments.
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Affiliation(s)
- Samira Jafari
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Zhila Izadi
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Loghman Alaei
- Department of Biology and Biotechnology, Faculty of Sciences, University of Kurdistan, Sanandaj, Iran
| | - Mehdi Jaymand
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Hadi Samadian
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Vali Ollah Kashani
- Department of Physical Education, Faculty of Human Sciences, Semnan University, Semnan, Iran.
| | - Hossein Derakhshankhah
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran.
| | - Payam Hayati
- Persian Gulf Science and Technology Park, Nano Gostaran Navabegh Fardaye Dashtestan Company, Borazjan, Iran.
| | - Foad Noori
- Student's Research Committee, Faculty of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, 6714415153, Iran
| | - Kamran Mansouri
- Medical Biology Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Faezeh Moakedi
- Department of Biochemistry and Molecular Biology, School of Medicine, West Virginia University, Morgantown, USA
| | - Jan Janczak
- Institute of Low Temperature and Structure Research Polish Academy of Sciences, P.O. Box 1410, Okolna 2 str., 50-950, Wrocław, Poland
| | - Mohammad Jaafar Soltanian Fard
- Department of Chemistry, Faculty of Chemical Science, Firoozabad Branch, Islamic Azad University, P.O. Box 74715-117, Firoozabad, Fars, Iran
| | - Nozar Fayaz Bakhsh
- Department of Chemistry, Faculty of Chemical Science, Firoozabad Branch, Islamic Azad University, P.O. Box 74715-117, Firoozabad, Fars, Iran
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Kumsampao J, Chaiwai C, Chasing P, Chawanpunyawat T, Namuangruk S, Sudyoadsuk T, Promarak V. A Simple and Strong Electron-Deficient 5,6-Dicyano[2,1,3]benzothiadiazole-Cored Donor-Acceptor-Donor Compound for Efficient Near Infrared Thermally Activated Delayed Fluorescence. Chem Asian J 2020; 15:3029-3036. [PMID: 32748490 DOI: 10.1002/asia.202000727] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/29/2020] [Indexed: 11/11/2022]
Abstract
Despite the success of thermally activated delayed fluorescent (TADF) materials in steering the next generation of organic light-emitting diodes (OLEDs), effective near infrared (NIR) TADF emitters are still very rare. Here, we present a simple and extremely high electron-deficient compound, 5,6-dicyano[2,1,3]benzothiadiazole (CNBz), as a strong electron-accepting unit to develop a sufficiently strong donor-acceptor (D-A) interaction for NIR emission. End-capping with the electron-donating triphenylamine (TPA) unit created an effective D-A-D type system, giving rise to an efficient NIR TADF emissive molecule (λem =750 nm) with a very small ΔEST of 0.06 eV. The electroluminescent device using this NIR TADF emitter exhibited an excellent performance with a high maximum radiance of 10020 mW Sr-1 m-2 , a maximum EQE of 6.57% and a peak wavelength of 712 nm.
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Affiliation(s)
- Jakkapan Kumsampao
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand
| | - Chaiyon Chaiwai
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand
| | - Pongsakorn Chasing
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand
| | - Thanyarat Chawanpunyawat
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand
| | - Supawadee Namuangruk
- National Nanotechnology Center, National Science and Technology Development Agency, Pathumthani, 12120, Thailand
| | - Taweesak Sudyoadsuk
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand
| | - Vinich Promarak
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand.,Research Network of NANOTEC-VISTEC on Nanotechnology for Energy, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand
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10
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Jayabharathi J, Nethaji P, Thanikachalam V, Ramya R. Derivatives of Cyanonaphthyl-Substituted Phenanthroimidazole as Blue Emitters for Nondoped Organic Light-Emitting Diodes. ACS OMEGA 2019; 4:4553-4570. [PMID: 31459647 PMCID: PMC6649183 DOI: 10.1021/acsomega.8b03617] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Accepted: 02/13/2019] [Indexed: 06/10/2023]
Abstract
New multifunctional blue-emissive materials with superior thermal properties, viz., 4,4'-bis(1-(4-naphthyl)-1H-phenanthro[9,10-d]imidazol-2-yl)binaphthyl (NPIBN), 4,4'-bis(1-(4-cyanonaphthyl)-1H-phenanthro[9,10-d]imidazol-2-yl)biphenyl (CNPIBP), and 4,4'-bis(1-(4-cyanonaphthyl)-1H-phenanthro[9,10-d]imidazol-2-yl)binaphthyl (CNPIBN) have been synthesized. The said molecules show high photoluminescence quantum yield (Φs/f: NPIBN-0.75/0.68, CNPIBP-0.85/0.76, and CNPIBN-0.90/0.88). The fabricated nondoped/doped device with CNPIBN/4,4'-bis(carbazol-9-yl)biphenyl: CNPIBN display maximum efficiencies (ηex 4.96/5.4%; ηc 7.46/7.56 cd A-1; ηp 6.85/6.91 lm W-1) at low turn-on voltage (3.5/3.8 V). Nondoped devices based on D-π-A architecture, 4-(2-(5-(9H-carbazol-9-yl)thiophen-2-yl)-1H-phenanthro[9,10-d]imidazol-1-yl)naphthalene-1-carbonitrile exhibit maximum efficiencies (ηex 2.32%; ηc 4.00 cd A-1; ηp 3.42 lm W-1) compared to 4-(2-(5-(4-(diphenylamino)phenyl)thiophen-2-yl)-1H-phenanthro[9,10-d]imidazol-1-yl)naphthalene-1-carbonitrile (ηex 2.01%; ηc 3.89 cd A-1; ηp 3.15 lm W-1).
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Affiliation(s)
- Jayaraman Jayabharathi
- Department of Chemistry, Annamalai
University, Annamalai Nagar, Chidambaram, Tamilnadu 608 002, India
| | - Pavadai Nethaji
- Department of Chemistry, Annamalai
University, Annamalai Nagar, Chidambaram, Tamilnadu 608 002, India
| | - Venugopal Thanikachalam
- Department of Chemistry, Annamalai
University, Annamalai Nagar, Chidambaram, Tamilnadu 608 002, India
| | - Ramaiyan Ramya
- Department of Chemistry, Annamalai
University, Annamalai Nagar, Chidambaram, Tamilnadu 608 002, India
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Jayabharathi J, Ramya R, Thanikachalam V, Nethaji P. Optical and electroluminescent performances of dihydrobenzodioxin phenanthroimidazoles based blue-emitting materials. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.02.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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12
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Jhulki S, Seth S, Rafiq S, Ghosh A, Chow TJ, Moorthy JN. Nitrogen-Free Bifunctional Bianthryl Leads to Stable White-Light Emission in Bilayer and Multilayer OLED Devices. ACS OMEGA 2018; 3:1416-1424. [PMID: 31458471 PMCID: PMC6641470 DOI: 10.1021/acsomega.7b01712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 01/19/2018] [Indexed: 06/10/2023]
Abstract
White organic light-emitting diodes (WOLEDs) are at the center stage of OLED research today because of their advantages in replacing the high energy-consuming lighting technologies in vogue for a long time. New materials that emit white light in simple devices are much sought after. We have developed two novel electroluminescent materials, referred to as BABZF and BATOMe, based on a twisted bianthryl core, which are brilliantly fluorescent, thermally highly stable with high T d and T g, and exhibit reversible redox property. Although inherently blue emissive, BABZF leads to white-light emission (CIE ≈ 0.28, 0.33) with a moderate power efficiency of 2.24 lm/W and a very high luminance of 15 600 cd/m2 in the fabricated multilayer nondoped OLED device. This device exhibited excellent color stability over a range of applied potential. Remarkably, similar white-light emission was captured even from a double-layer device, attesting to the innate hole-transporting ability of BABZF despite it being non-nitrogenous, that is, lacking any traditional hole-transporting di-/triarylamino group(s). Similar studies with BATOMe led to inferior device performance results, thereby underscoring the importance of dibenzofuryl groups in BABZF. Experimental as well as theoretical studies suggest the possibility of emission from multiple species involving BABZF and its exciplex and electroplex in the devices. The serendipitously observed white-light emission from a double-layer device fabricated with an unconventional hole-transporting material (HTM) opens up new avenues to create new non-nitrogenous HTMs that may lead to more efficient white-light emission in simple double-layer devices.
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Affiliation(s)
- Samik Jhulki
- Department
of Chemistry, Indian Institute of Technology
Kanpur, Kanpur 208016, India
| | - Saona Seth
- Department
of Chemistry, Indian Institute of Technology
Kanpur, Kanpur 208016, India
| | - Shahnawaz Rafiq
- Frick
Chemistry Laboratory, Princeton University, Princeton, New Jersey 08544, United States
| | - Avijit Ghosh
- Institute
of Chemistry Academia Sinica, Taipei, Taiwan 115
- Department
of Chemistry, Tunghai University, Taichung, Taiwan 407
| | - Tahsin J. Chow
- Institute
of Chemistry Academia Sinica, Taipei, Taiwan 115
- Department
of Chemistry, Tunghai University, Taichung, Taiwan 407
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13
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Jayabharathi J, Ramya R, Thanikachalam V, Nethaji P. Tailoring the molecular design of twisted dihydrobenzodioxin phenanthroimidazole derivatives for non-doped blue organic light-emitting devices. RSC Adv 2018; 8:29031-29043. [PMID: 35548015 PMCID: PMC9084391 DOI: 10.1039/c8ra05004j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 07/30/2018] [Indexed: 11/21/2022] Open
Abstract
Three fused polycyclic aryl fragments, namely, naphthyl, methoxynaphthyl, and pyrenyl have been used to construct blue-emissive phenanthroimidazole-functionalized target molecules, i.e., 1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-2-(naphthalen-1-yl)-1H-phenanthro[9,10-d]imidazole (1), 1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-2-(1-methoxynaphthalen-4-yl)-1H-phenanthro[9,10-d]imidazole (2), and 1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-2-(pyren-10-yl)-1H-phenanthro[9,10-d]imidazole (3). The up-conversion of triplets to singlets via a triplet–triplet annihilation (TTA) process is dominant in these compounds due to 2ET1 > ES1. The pyrenyl dihydrobenzodioxin phenanthroimidazole (3)-based nondoped OLED exhibits blue emission (450 nm) with CIE (0.15, 0.14), a luminance of 53 890 cd m−2, power efficiency of 5.86 lm W−1, external quantum efficiency of 5.30%, and current efficiency of 6.90 cd A−1. The efficient device performance of pyrenyl dihydrobenzodioxin phenanthroimidazole is due to the TTA contribution to the electroluminescent process. Efficient blue emitters, 1-(2,3-dihydrobenzodioxinyl)-2-naphthylphenanthroimidazole, 1-(2,3-dihydrobenzodioxinyl)-2-methoxynaphthylphenanthroimidazole and 1-(2,3-dihydrobenzodioxinyl)-2-pyrenylphenanthroimidazole have been reported.![]()
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14
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Nie J, Li N, Ni Z, Zhao Y, Zhang L. A sensitive tetraphenylethene-based fluorescent probe for Zn 2+ ion involving ESIPT and CHEF processes. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.04.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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15
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Xing ZH, Zhuang JY, Xu XP, Ji SJ, Su WM, Cui Z. Novel oxazole-based emitters for high efficiency fluorescent OLEDs: Synthesis, characterization, and optoelectronic properties. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.02.049] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Zhang R, Zhang T, Xu L, Han F, Zhao Y, Ni Z. A new series of short axially symmetrically and asymmetrically 1,3,6,8-tetrasubstituted pyrenes with two types of substituents: Syntheses, structures, photophysical properties and electroluminescence. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.07.105] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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17
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Jhulki S, Mishra AK, Chow TJ, Moorthy JN. Helicenes as All-in-One Organic Materials for Application in OLEDs: Synthesis and Diverse Applications of Carbo- and Aza[5]helical Diamines. Chemistry 2016; 22:9375-86. [DOI: 10.1002/chem.201600668] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Samik Jhulki
- Department of Chemistry; Indian Institute of Technology; Kanpur 208016 India), Fax: (+91) 512-2596806
| | - Abhaya Kumar Mishra
- Department of Chemistry; Indian Institute of Technology; Kanpur 208016 India), Fax: (+91) 512-2596806
| | - Tahsin J. Chow
- Institute of Chemistry; Academia Sinica; Taipei, Taiwan 115 Republic of China
| | - Jarugu Narasimha Moorthy
- Department of Chemistry; Indian Institute of Technology; Kanpur 208016 India), Fax: (+91) 512-2596806
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18
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Yang J, Huang Y, Zhu H, Huang W, Wang W. Emission-Tunable Multicolor Graphene Molecules with Controllable Synthesis, Excellent Optical Properties, and Specific Applications. ACS APPLIED MATERIALS & INTERFACES 2016; 8:7938-7947. [PMID: 26974338 DOI: 10.1021/acsami.6b00832] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Series of graphene molecules with varied emission colors have been prepared by oxidative cyclodehydrogenation using anhydrous ferric chloride (FeCl3) as the catalyst under mild conditions. By controlling the oxidation time in the initial step only, molecules with different fluorescence colors are conveniently obtained. New colors can be recorded evidently because of the stepwise and controllable process, which highly related to the conjugation length. Blue emissive starting compounds in the solid state can be transformed into orange upon brief oxidation, whereas green emissive oligomers are varied to red with an emission wavelength redshift about 123 nm. Cyclic voltammetry measurements performed can give the corresponding data, which verify the results drawn from the UV and PL spectroscope. The gradual change of conjugation length with tunable emission is confirmed in the MALDI-TOF study as well. Further characterizations indicate that the graphene molecules possess satisfactory optical properties, which are highly emissive both in solution and in the solid state because of the alkyl group. In addition, the good thermal stability and the self-assembly of graphene molecules suggest that they are promising candidates for high-tech applications. Furthermore, the fabricated field-effect transistors possess the nice performance, whose mobilities are about 0.57 cm(2) V(-1) s(-1) with an on-off ratio of 1 × 10(4) and 0.81 cm(2) V(-1) s(-1) with an on-off ratio of 1 × 10(3), respectively.
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Affiliation(s)
- Junwei Yang
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University , Shanghai 200433, P. R. China
| | - Yuli Huang
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University , Shanghai 200433, P. R. China
| | - Haoyun Zhu
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University , Shanghai 200433, P. R. China
| | - Wei Huang
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University , Shanghai 200433, P. R. China
| | - Weizhi Wang
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University , Shanghai 200433, P. R. China
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19
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Zhang R, Zhao Y, Li G, Yang D, Ni Z. A new series of pyrenyl-based triarylamines: syntheses, structures, optical properties, electrochemistry and electroluminescence. RSC Adv 2016. [DOI: 10.1039/c5ra26017e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new series of pyrenyl-based triarylamines (2a–2e and 3py) were designed and synthesized. These pyrene-based triarylamines exhibit excellent photoelectric properties and are potentially functional materials for devices.
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Affiliation(s)
- Ran Zhang
- School of Chemical Engineering and Technology
- China University of Mining and Technology
- Xuzhou 221116
- P. R. China
| | - Yun Zhao
- School of Chemical Engineering and Technology
- China University of Mining and Technology
- Xuzhou 221116
- P. R. China
| | - Guoling Li
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Fukuoka
- Japan
| | - Daisheng Yang
- School of Chemical Engineering and Technology
- China University of Mining and Technology
- Xuzhou 221116
- P. R. China
| | - Zhonghai Ni
- School of Chemical Engineering and Technology
- China University of Mining and Technology
- Xuzhou 221116
- P. R. China
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20
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Photo-Crosslinking of Pendent Uracil Units Provides Supramolecular Hole Injection/Transport Conducting Polymers for Highly Efficient Light-Emitting Diodes. Polymers (Basel) 2015. [DOI: 10.3390/polym7050804] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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21
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Kumar D, Thomas KRJ, Lee CP, Ho KC. Triarylamine-Free Pyrenoimidazole-Containing Organic Dyes with Different π-Linkers for Dye-Sensitized Solar Cells. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201402214] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Keawin T, Prachumrak N, Namuangruk S, Pansay S, Kungwan N, Maensiri S, Jungsuttiwong S, Sudyoadsuk T, Promarak V. Efficient bifunctional materials based on pyrene- and triphenylamine-functionalized dendrimers for electroluminescent devices. RSC Adv 2015. [DOI: 10.1039/c5ra07161e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
These materials show a promising bifunctional property as blue emissive layer and hole-transporting layer for high efficiency solution processed blue and Alq3-based green OLEDs with much simpler device architecture.
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Affiliation(s)
- T. Keawin
- Department of Chemistry
- Faculty of Science
- Ubon Ratchathani University
- Ubon Ratchathani 34190
- Thailand
| | - N. Prachumrak
- School of Molecular Science and Engineering
- Vidyasirimedhi Institute of Science and Technology
- Rayong
- Thailand
| | - S. Namuangruk
- National Nanotechnology Center
- Pathumthani 12120
- Thailand
| | - S. Pansay
- Department of Chemistry
- Faculty of Science
- Ubon Ratchathani University
- Ubon Ratchathani 34190
- Thailand
| | - N. Kungwan
- Chemistry Department
- Faculty of Science
- Chiang Mai University
- Chiang Mai 50200
- Thailand
| | - S. Maensiri
- School of Physics
- Institute of Science
- Suranaree University of Technology
- Nakhon Ratchasima 30000
- Thailand
| | - S. Jungsuttiwong
- Department of Chemistry
- Faculty of Science
- Ubon Ratchathani University
- Ubon Ratchathani 34190
- Thailand
| | - T. Sudyoadsuk
- School of Molecular Science and Engineering
- Vidyasirimedhi Institute of Science and Technology
- Rayong
- Thailand
| | - V. Promarak
- School of Molecular Science and Engineering
- Vidyasirimedhi Institute of Science and Technology
- Rayong
- Thailand
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23
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Kotchapadist P, Prachumrak N, Sunonnam T, Namuangruk S, Sudyoadsuk T, Keawin T, Jungsuttiwong S, Promarak V. Synthesis, Characterisation, and Electroluminescence Properties ofN-Coumarin Derivatives Containing Peripheral Triphenylamine. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402680] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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24
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Prachumrak N, Potjanasopa S, Rattanawan R, Namuangruk S, Jungsuttiwong S, Keawin T, Sudyoadsuk T, Promarak V. Coumarin-cored carbazole dendrimers as solution-processed non-doped green emitters for electroluminescent devices. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.03.088] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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Sudyoadsuk T, Moonsin P, Prachumrak N, Namuangruk S, Jungsuttiwong S, Keawin T, Promarak V. Carbazole dendrimers containing oligoarylfluorene cores as solution-processed hole-transporting non-doped emitters for efficient pure red, green, blue and white organic light-emitting diodes. Polym Chem 2014. [DOI: 10.1039/c4py00228h] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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26
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Kochapradist P, Prachumrak N, Tarsang R, Keawin T, Jungsuttiwong S, Sudyoadsuk T, Promarak V. Multi-triphenylamine-substituted carbazoles: synthesis, characterization, properties, and applications as hole-transporting materials. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.05.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Kumar D, Thomas KRJ, Lin CC, Jou JH. Pyrenoimidazole-Based Deep-Blue-Emitting Materials: Optical, Electrochemical, and Electroluminescent Characteristics. Chem Asian J 2013; 8:2111-24. [DOI: 10.1002/asia.201300271] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 04/16/2013] [Indexed: 12/24/2022]
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28
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Prachumrak N, Namuangruk S, Keawin T, Jungsuttingwong S, Sudyoadsuk T, Promarak V. Synthesis and Characterization of 9-(Fluoren-2-yl)anthracene Derivatives as Efficient Non-Doped Blue Emitters for Organic Light-Emitting Diodes. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300165] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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29
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Poriel C, Rault-Berthelot J, Thirion D. Modulation of the Electronic Properties of 3π-2spiro Compounds Derived from Bridged Oligophenylenes: A Structure–Property Relationship. J Org Chem 2013; 78:886-98. [PMID: 23249095 DOI: 10.1021/jo302183f] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Cyril Poriel
- Institut des Sciences Chimiques de Rennes, Equipe Matière
Condensée et Systèmes Electroactifs, Université de Rennes 1 - CNRS UMR 6226, Campus de Beaulieu, Bat
10C, Avenue du Général Leclerc, 35042, Rennes Cedex,
France
| | - Joëlle Rault-Berthelot
- Institut des Sciences Chimiques de Rennes, Equipe Matière
Condensée et Systèmes Electroactifs, Université de Rennes 1 - CNRS UMR 6226, Campus de Beaulieu, Bat
10C, Avenue du Général Leclerc, 35042, Rennes Cedex,
France
| | - Damien Thirion
- Institut des Sciences Chimiques de Rennes, Equipe Matière
Condensée et Systèmes Electroactifs, Université de Rennes 1 - CNRS UMR 6226, Campus de Beaulieu, Bat
10C, Avenue du Général Leclerc, 35042, Rennes Cedex,
France
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30
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Moonsin P, Prachumrak N, Namuangruk S, Jungsuttiwong S, Keawin T, Sudyoadsuk T, Promarak V. Novel bis(fluorenyl)benzothiadiazole-cored carbazole dendrimers as highly efficient solution-processed non-doped green emitters for organic light-emitting diodes. Chem Commun (Camb) 2013; 49:6388-90. [DOI: 10.1039/c3cc42931h] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Prabhu DD, Kumar NSS, Sivadas AP, Varghese S, Das S. Trigonal 1,3,4-Oxadiazole-Based Blue Emitting Liquid Crystals and Gels. J Phys Chem B 2012; 116:13071-80. [DOI: 10.1021/jp305349h] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Deepak D. Prabhu
- Photosciences and Photonics
Section, Chemical Sciences
and Technology Division, National Institute for Interdisciplinary
Science and Technology (NIIST) and Network of Institutes for Solar
Energy, CSIR, Trivandrum 695 019, India
| | - N. S. Saleesh Kumar
- Photosciences and Photonics
Section, Chemical Sciences
and Technology Division, National Institute for Interdisciplinary
Science and Technology (NIIST) and Network of Institutes for Solar
Energy, CSIR, Trivandrum 695 019, India
| | - Aneesh P. Sivadas
- Photosciences and Photonics
Section, Chemical Sciences
and Technology Division, National Institute for Interdisciplinary
Science and Technology (NIIST) and Network of Institutes for Solar
Energy, CSIR, Trivandrum 695 019, India
| | - Shinto Varghese
- Photosciences and Photonics
Section, Chemical Sciences
and Technology Division, National Institute for Interdisciplinary
Science and Technology (NIIST) and Network of Institutes for Solar
Energy, CSIR, Trivandrum 695 019, India
| | - Suresh Das
- Photosciences and Photonics
Section, Chemical Sciences
and Technology Division, National Institute for Interdisciplinary
Science and Technology (NIIST) and Network of Institutes for Solar
Energy, CSIR, Trivandrum 695 019, India
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Prachumrak N, Thangthong AM, Tarsang R, Keawin T, Jungsuttiwong S, Sudyoadsuk T, Promarak V. Synthesis, characterization, physical properties, and applications of highly fluorescent pyrene-functionalized 9,9-bis(4-diarylaminophenyl)fluorene in organic light-emitting diodes. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.07.112] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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33
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Khunchalee J, Tarsang R, Prachumrak N, Jungsuttiwong S, Keawin T, Sudyoadsuk T, Promarak V. Synthesis and properties of oligofluorene-thiophenes as emissive materials for organic electroluminescent devices: color-tuning from deep blue to orange. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.07.097] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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34
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Thangthong AM, Prachumrak N, Namuangruk S, Jungsuttiwong S, Keawin T, Sudyoadsuk T, Promarak V. Synthesis, Properties and Applications of Biphenyl Functionalized 9,9-Bis(4-diphenylaminophenyl)fluorenes as Bifunctional Materials for Organic Electroluminescent Devices. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200641] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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