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Raikwar MM, Kim SC, Sun J, Chu C, Lee JY. Highly Efficient Phosphorescent Organic Light-Emitting Diodes Using Benzo[4',5']imidazo[2',1':2,3]imidazo[4,5,1- jk]carbazole as a Rigid and Effective Electron Acceptor in Bipolar Host. ACS APPLIED MATERIALS & INTERFACES 2023; 15:40809-40816. [PMID: 37584658 DOI: 10.1021/acsami.3c08099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/17/2023]
Abstract
A novel bipolar host architecture was investigated to improve the external quantum efficiency (EQE) of green phosphorescent organic light-emitting diodes (PhOLEDs). The host was developed by incorporating carbazole as a hole-transport unit and fused rigid benzo[4',5']imidazo[2',1':2,3]imidazo[4, 5, 1-jk]carbazole (BzICz) as a new electron transport unit. The primary goal of the BzICz-based host design was to achieve a high triplet energy and bipolar charge transport characteristics. The green PhOLEDs fabricated using the new BzICz and carbazole-based host demonstrated a high EQE of 26.6% due to their high triplet energy and good bipolar charge transporting characteristics.
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Affiliation(s)
- Manish Mannulal Raikwar
- School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi 440-746, Republic of Korea
| | - Seung Chan Kim
- School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi 440-746, Republic of Korea
| | - Jinwon Sun
- Materials Research Team, Display Research Center, Samsung Display, Yongin, Gyeonggi 17102, Republic of Korea
| | - Changwoong Chu
- Materials Research Team, Display Research Center, Samsung Display, Yongin, Gyeonggi 17102, Republic of Korea
| | - Jun Yeob Lee
- School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi 440-746, Republic of Korea
- SKKU Advanced Institute of Nano Technology, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi 16419, Republic of Korea
- SKKU Institute of Energy Science and Technology, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi 16419, Republic of Korea
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2
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Mantur S, Patil MK, Najare MS, Nadaf AA, Yaseen M, Gaonkar S, Inamdar SR, Khazi IAM, Kamble RR. Design and Synthesis of D‐π‐A form of
p
‐Nitrophenylacrylonitrile Substituted Triphenylamine Chromophores; Photophysical, Electrochemical Properties, DFT and Thermal Studies. ChemistrySelect 2021. [DOI: 10.1002/slct.202102873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shivaraj Mantur
- Department of Chemistry Karnatak University Dharwad 580003 Karnataka India
| | | | - Mahesh S. Najare
- Department of Chemistry Karnatak University Dharwad 580003 Karnataka India
| | - AfraQuasar A. Nadaf
- Department of Chemistry Karnatak University Dharwad 580003 Karnataka India
- Department of Chemistry K. L. E. Society's P. C. Jabin Science College Hubli Karnataka India
| | - Mohammed Yaseen
- Department of Chemistry Karnatak University Dharwad 580003 Karnataka India
| | - Supreet Gaonkar
- Department of Chemistry Karnatak University Dharwad 580003 Karnataka India
| | | | | | - Ravindra R. Kamble
- Department of Chemistry Karnatak University Dharwad 580003 Karnataka India
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3
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Patil B, Lade J, Sathe P, Tripathi A, Pownthurai B, Chetti P, Jadhav Y, Chaskar A. Combined experimental and density functional theory studies on novel 9‐(4/3/2‐cyanophenyl)‐9
H
‐carbazole‐3‐carbonitrile compounds for organic electronics. J PHYS ORG CHEM 2021. [DOI: 10.1002/poc.4207] [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)
- Bhausaheb Patil
- National Centre for Nanosciences and Nanotechnology University of Mumbai Mumbai India
| | - Jatin Lade
- National Centre for Nanosciences and Nanotechnology University of Mumbai Mumbai India
| | - Pratima Sathe
- National Centre for Nanosciences and Nanotechnology University of Mumbai Mumbai India
| | - Anuj Tripathi
- Department of Chemistry National Institute of Technology Kurukshetra Haryana India
| | - B. Pownthurai
- National Centre for Nanosciences and Nanotechnology University of Mumbai Mumbai India
| | - Prabhakar Chetti
- Department of Chemistry National Institute of Technology Kurukshetra Haryana India
| | - Yogesh Jadhav
- National Centre for Nanosciences and Nanotechnology University of Mumbai Mumbai India
| | - Atul Chaskar
- National Centre for Nanosciences and Nanotechnology University of Mumbai Mumbai India
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4
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Li D, Li J, Liu D, Li W, Ko CL, Hung WY, Duan C. Highly Efficient Simple-Structure Sky-Blue Organic Light-Emitting Diode Using a Bicarbazole/Cyanopyridine Bipolar Host. ACS APPLIED MATERIALS & INTERFACES 2021; 13:13459-13469. [PMID: 33703891 DOI: 10.1021/acsami.0c20128] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Up to now, the most efficient blue phosphorescent organic light-emitting diode (PhOLED) was achieved with a maximum external quantum efficiency (ηext) of 34.1% by using an exciplex cohost. It still remains a challenge to obtain such high efficiencies using a single-host matrix. In this work, a highly efficient sky-blue PhOLED is successfully fabricated using a newly developed bipolar host material, namely 5-(2-(9H-[3,9'-bicarbazol]-9-yl)phenyl)nicotinonitrile (o-PyCNBCz), which realizes a ηext of 29.4% at a practical luminance of 100 cd m-2 and a maximum ηext of 34.6% (at 23 cd m-2). The present device is characterized by simple configuration with a single host and single emitting layer. o-PyCNBCz also reveals high efficiency of 28.2% (94.8 cd A-1) when used as the host for green PhOLED. Under identical conditions, o-PyCNBCz always outperforms than its isomer 3-PyCNBCz (5-(9-phenyl-9H-[3,9'-bicarbazol]-6-yl)nicotinonitrile) in terms of more balanced charge transportation, higher photoluminescent quantum yields of over 90%, and higher horizontal orientation ratio of the emitting dipole for the host-dopant films, which finally lead to its superior performance in PhOLEDs. It is observed that all these merits of o-PyCNBCz benefit from its ortho-linking style of carbazole (p-type unit) and cyanopyridine (n-type unit) on the phenylene bridge and the resultant molecular conformation.
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Affiliation(s)
- Deli Li
- State Key Laboratory of Fine Chemicals, College of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Jiuyan Li
- State Key Laboratory of Fine Chemicals, College of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Di Liu
- State Key Laboratory of Fine Chemicals, College of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Wei Li
- State Key Laboratory of Fine Chemicals, College of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Chang-Lun Ko
- Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung 202, Taiwan
| | - Wen-Yi Hung
- Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung 202, Taiwan
| | - Chunhui Duan
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
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5
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Liu Y, Zhu J, Chen Y, Liang W, Zhou H, Huang J, Xia Z, Su J. Bicarbazole/nitrogen heterocycle based bipolar host materials for efficient green phosphorescent organic light-emitting diodes. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.06.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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6
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Tagare J, Dubey DK, Jou J, Vaidyanathan S. Near UV/Deep‐Blue Phenanthroimidazole‐Based Luminophores for Organic Light‐Emitting Diodes: Experimental and Theoretical Investigation. ChemistrySelect 2019. [DOI: 10.1002/slct.201900383] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jairam Tagare
- Optoelectronics laboratoryDepartment of ChemistryNational Institute of Technology Rourkela India
| | - Deepak Kumar Dubey
- Department of Materials Science and EngineeringNational Tsing Hua University Hsinchu Taiwan- 30013
| | - Jwo‐Huei Jou
- Department of Materials Science and EngineeringNational Tsing Hua University Hsinchu Taiwan- 30013
| | - Sivakumar Vaidyanathan
- Optoelectronics laboratoryDepartment of ChemistryNational Institute of Technology Rourkela India
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7
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Patil BN, Lade JJ, Vadagaonkar KS, Chetti P, Chaskar AC. Pyrrolo[1, 2-a]quinoxaline-Based Bipolar Host Materials for Efficient Red Phosphorescent OLEDs. ChemistrySelect 2018. [DOI: 10.1002/slct.201801817] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Bhausaheb N. Patil
- National Centre for Nanosciences and Nanotechnology; University of Mumbai, Vidyanagari, Kalina Campus, Santacruz (East); Mumbai-400098 India
| | - Jatin J. Lade
- National Centre for Nanosciences and Nanotechnology; University of Mumbai, Vidyanagari, Kalina Campus, Santacruz (East); Mumbai-400098 India
| | - Kamlesh S. Vadagaonkar
- Department of Dyestuff Technology; Institute of Chemical Technology, Nathalal Parekh Marg, Matunga (East); Mumbai-400019 India
| | - Prabhakar Chetti
- Department of Chemistry; National Institute of Technology; Kurukshetra-136119, Haryana India
| | - Atul C. Chaskar
- National Centre for Nanosciences and Nanotechnology; University of Mumbai, Vidyanagari, Kalina Campus, Santacruz (East); Mumbai-400098 India
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8
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Tagare J, Ulla H, Satyanarayan M, Vaidyanathan S. Efficient non-doped bluish-green organic light emitting devices based on N1 functionalized star-shaped phenanthroimidazole fluorophores. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.11.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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9
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Chen WC, Yuan Y, Zhu ZL, Ni SF, Jiang ZQ, Liao LS, Wong FL, Lee CS. A novel spiro-annulated benzimidazole host for highly efficient blue phosphorescent organic light-emitting devices. Chem Commun (Camb) 2018; 54:4541-4544. [DOI: 10.1039/c8cc00903a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel host featuring a spiro-annulated benzimidazole configuration is exploited for blue phosphorescent organic light-emitting devices (PhOLEDs).
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Affiliation(s)
- Wen-Cheng Chen
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry
- City University of Hong Kong
- Hong Kong SAR
- P. R. China
| | - Yi Yuan
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Institute of Functional Nano & Soft Materials (FUNSOM) & Collaborative Innovation Center of Suzhou Nano Science and Technology
- Soochow University
- Suzhou
- P. R. China
| | - Ze-Lin Zhu
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry
- City University of Hong Kong
- Hong Kong SAR
- P. R. China
| | - Shao-Fei Ni
- Department of Chemistry
- Southern University of Science and Technology
- Shenzhen
- P. R. China
| | - Zuo-Quan Jiang
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Institute of Functional Nano & Soft Materials (FUNSOM) & Collaborative Innovation Center of Suzhou Nano Science and Technology
- Soochow University
- Suzhou
- P. R. China
| | - Liang-Sheng Liao
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Institute of Functional Nano & Soft Materials (FUNSOM) & Collaborative Innovation Center of Suzhou Nano Science and Technology
- Soochow University
- Suzhou
- P. R. China
| | - Fu-Lung Wong
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry
- City University of Hong Kong
- Hong Kong SAR
- P. R. China
| | - Chun-Sing Lee
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry
- City University of Hong Kong
- Hong Kong SAR
- P. R. China
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10
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Tagare J, Ulla H, Kajjam AB, Satyanarayan M, Vaidyanathan S. Star‐Shaped Phenanthroimidazole‐Triphenylamine‐Based Yellow Organic Emitter for Organic Light Emitting Diodes. ChemistrySelect 2017. [DOI: 10.1002/slct.201700056] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jairam Tagare
- Optoelectronics LaboratoryDepartment of ChemistryNational Institute of Technology Rourkela India
| | - Hidayath Ulla
- Optoelectronics LaboratoryDepartment of PhysicsNational Institute of Technology Karnataka Surathkal India
| | - Aravind Babu Kajjam
- Optoelectronics LaboratoryDepartment of ChemistryNational Institute of Technology Rourkela India
| | - M.N. Satyanarayan
- Optoelectronics LaboratoryDepartment of PhysicsNational Institute of Technology Karnataka Surathkal India
| | - Sivakumar Vaidyanathan
- Optoelectronics LaboratoryDepartment of ChemistryNational Institute of Technology Rourkela India
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11
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Phosphorescent Neutral Iridium (III) Complexes for Organic Light-Emitting Diodes. Top Curr Chem (Cham) 2017; 375:39. [DOI: 10.1007/s41061-017-0126-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 02/22/2017] [Indexed: 11/26/2022]
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12
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Deshapande N, Pujar GH, Sunagar MG, Gaonkar S, Belavagi NS, Inamdar SR, Bathula C, Khazi IAM. Synthesis and Optoelectronic Exploration of Highly Conjugated 1,3,4-Oxadiazole Containing Donor-π-Acceptor Chromophores. ChemistrySelect 2017. [DOI: 10.1002/slct.201700048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Narahari Deshapande
- CPEPA; Department of Chemistry; Karnatak University; Dharwad 580003, Karnataka India
| | - G. H. Pujar
- CPEPA; Department of Physics; Karnatak University; Dharwad 580003, Karnataka India
| | - Manjunath G. Sunagar
- CPEPA; Department of Chemistry; Karnatak University; Dharwad 580003, Karnataka India
| | - Supreet Gaonkar
- CPEPA; Department of Chemistry; Karnatak University; Dharwad 580003, Karnataka India
| | | | - S. R. Inamdar
- CPEPA; Department of Physics; Karnatak University; Dharwad 580003, Karnataka India
| | - Chinna Bathula
- Department of Chemistry; Research Institute for Natural Sciences and Institute of Nanoscience and Technology; Hanyang University; Seoul 133-791 Republic of Korea
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13
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Wu C, Guo Q, Ma W, Li X, Qiu P, Hu J, Wang Q, Chen J, Ma D. Hybrid host materials for highly efficient electrophosphorescence and thermally activated delayed fluorescence independent of the linkage mode. Phys Chem Chem Phys 2017; 19:5177-5184. [DOI: 10.1039/c6cp08334j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three non-conjugated bipolar hybrid host materials with different molecular structures but similar optoelectronic properties have been synthesized and characterized.
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Affiliation(s)
- Chao Wu
- Shaanxi Key Laboratory for Advanced Energy Devices
- School of Materials Science and Engineering
- Shaanxi Normal University
- Xi'an 710119
- P. R. China
| | - Qingxun Guo
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- University of Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Wujun Ma
- Shaanxi Key Laboratory for Advanced Energy Devices
- School of Materials Science and Engineering
- Shaanxi Normal University
- Xi'an 710119
- P. R. China
| | - Xiaoping Li
- College of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
| | - Panlong Qiu
- Shaanxi Key Laboratory for Advanced Energy Devices
- School of Materials Science and Engineering
- Shaanxi Normal University
- Xi'an 710119
- P. R. China
| | - Jianyong Hu
- Shaanxi Key Laboratory for Advanced Energy Devices
- School of Materials Science and Engineering
- Shaanxi Normal University
- Xi'an 710119
- P. R. China
| | - Qiang Wang
- Shaanxi Key Laboratory for Advanced Energy Devices
- School of Materials Science and Engineering
- Shaanxi Normal University
- Xi'an 710119
- P. R. China
| | - Jiangshan Chen
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- University of Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Dongge Ma
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- University of Chinese Academy of Sciences
- Changchun 130022
- P. R. China
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14
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Nie Z, Mai Z, Peng Y, Chen K, Zhang Y, Zheng W. Computational design of high efficiency nonplanar tri-s-triazine-based ambipolar host materials for phosphorescent blue emitters. Phys Chem Chem Phys 2016; 18:33009-33020. [PMID: 27886293 DOI: 10.1039/c6cp06230j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of nonplanar tri-s-triazine-based molecules were designed, and their optical, electronic, and charge transport properties as ambipolar host materials for blue electrophosphorescence emitters were explored by density functional theory. The influence of the linkage between tri-s-triazine and carbazole, diphenylamine and triphenylamine, as well as the influence of a series of electron-donating and electron-withdrawing substituents on triplet energy, energy level matching and charge transport of the designed molecules was discussed in detail. Our results reveal that the molecules under investigation can serve as host materials for blue electrophosphorescence emitters. We also predicted the mobility of designed molecules with better performance in the P1[combining macron] space group. Based on the investigated results, we proposed a rational way for the design of host materials for OLEDs, and also expanded the application field of tri-s-triazine.
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Affiliation(s)
- Zhaomin Nie
- College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China.
| | - Zhirui Mai
- College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China.
| | - Yiming Peng
- College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China.
| | - Kaiping Chen
- College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China.
| | - Yiyun Zhang
- College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China.
| | - Wenxu Zheng
- College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China.
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15
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He K, Su N, Junting Y, Liu Y, Xiong W, Hao Z, Ma D, Zhu W. Dinuclear cyclometalated iridium (III) complex containing functionalized triphenylamine core: synthesis, photophysics and application in the single-emissive-layer WOLEDs. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.09.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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16
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Li W, Li J, Liu D, Jin Q. Simple Bipolar Host Materials for High-Efficiency Blue, Green, and White Phosphorescence OLEDs. ACS APPLIED MATERIALS & INTERFACES 2016; 8:22382-22391. [PMID: 27517473 DOI: 10.1021/acsami.6b05355] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
3-(1H-Pyrazol-1-yl)pyridine is used as electron-transporting unit to construct bipolar host materials o-CzPyPz, m-CzPyPz, and p-CzPyPz for application in phosphorescent organic light-emitting diodes (PhOLEDs). By varying the ortho-, meta-, or para-linking mode between the n-type 3-(1H-pyrazol-1-yl)pyridine and the p-type carbazole on phenylene bridge, the optoelectronic parameters are tuned to large extent. The highly twisted o-CzPyPz has high triplet energy of 2.95 eV, while the isomer p-CzPyPz with more coplanar conformation has smaller triplet energy of 2.67 eV. The m-CzPyPz-hosted blue PhOLED exhibits a peak current efficiency of 49.1 cd A(-1) (corresponding to an external quantum efficiency of 24.5%) and low-efficiency roll-off, while the p-CzPyPz-hosted green PhOLEDs turns on at 2.8 V and exhibits high efficiencies of 91.8 cd A(-1) (96.1 lm W(-1) and 27.3%). Furthermore, two-emitting-layer white OLEDs are fabricated with m-CzPyPz or p-CzPyPz as common hosts for both blue and orange phosphors, which realize high efficiencies of 57.8 cd A(-1) (45.4 lm W(-1) and 23.6%) and 60.7 cd A(-1) (38.1 lm W(-1) and 23.1%). The optimization of host structure for good matching of host and dopant and finally for the ideal performance is discussed.
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Affiliation(s)
- Wei Li
- State Key Laboratory of Fine Chemicals, College of Chemical Engineering, Dalian University of Technology , 2 Linggong Road, Dalian 116024, China
| | - Jiuyan Li
- State Key Laboratory of Fine Chemicals, College of Chemical Engineering, Dalian University of Technology , 2 Linggong Road, Dalian 116024, China
| | - Di Liu
- State Key Laboratory of Fine Chemicals, College of Chemical Engineering, Dalian University of Technology , 2 Linggong Road, Dalian 116024, China
| | - Qian Jin
- State Key Laboratory of Fine Chemicals, College of Chemical Engineering, Dalian University of Technology , 2 Linggong Road, Dalian 116024, China
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17
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Chen D, Han L, Chen W, Zhang Z, Zhang S, Yang B, Zhang Z, Zhang J, Wang Y. Bis(2-(benzo[d]thiazol-2-yl)-5-fluorophenolate)beryllium: a high-performance electron transport material for phosphorescent organic light-emitting devices. RSC Adv 2016. [DOI: 10.1039/c5ra24244d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
A beryllium complex with a low-lying LUMO level, high triplet energy and high electron mobility served as an excellent electron transport material for green, yellow and red phosphorescent OLEDs.
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Affiliation(s)
- Dong Chen
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Liang Han
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Weiping Chen
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Zhenyu Zhang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Shitong Zhang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Bing Yang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Zuolun Zhang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Jingying Zhang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Yue Wang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
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18
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Yang X, Zhou G, Wong WY. Functionalization of phosphorescent emitters and their host materials by main-group elements for phosphorescent organic light-emitting devices. Chem Soc Rev 2015; 44:8484-575. [PMID: 26245654 DOI: 10.1039/c5cs00424a] [Citation(s) in RCA: 393] [Impact Index Per Article: 43.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Phosphorescent organic light-emitting devices (OLEDs) have attracted increased attention from both academic and industrial communities due to their potential practical application in high-resolution full-color displays and energy-saving solid-state lightings. The performance of phosphorescent OLEDs is mainly limited by the phosphorescent transition metal complexes (such as iridium(III), platinum(II), gold(III), ruthenium(II), copper(I) and osmium(II) complexes, etc.) which can play a crucial role in furnishing efficient energy transfer, balanced charge injection/transporting character and high quantum efficiency in the devices. It has been shown that functionalized main-group element (such as boron, silicon, nitrogen, phosphorus, oxygen, sulfur and fluorine, etc.) moieties can be incorporated into phosphorescent emitters and their host materials to tune their triplet energies, frontier molecular orbital energies, charge injection/transporting behavior, photophysical properties and thermal stability and hence bring about highly efficient phosphorescent OLEDs. So, in this review, the recent advances in the phosphorescent emitters and their host materials functionalized with various main-group moieties will be introduced from the point of view of their structure-property relationship. The main emphasis lies on the important role played by the main-group element groups in addressing the key issues of both phosphorescent emitters and their host materials to fulfill high-performance phosphorescent OLEDs.
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Affiliation(s)
- Xiaolong Yang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Department of Chemistry, Faculty of Science, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
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Zhang X, Shen W, Sun H, He R, Li M. Identifying efficient blue-phosphorescent polymer light-emitting diode host materials based on carbazole derivatives with C/Si-centered substituents using density functional theory. J Mol Model 2015; 21:178. [PMID: 26104849 DOI: 10.1007/s00894-015-2725-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 06/08/2015] [Indexed: 11/29/2022]
Abstract
Two series of carbazole derivatives were designed and studied that could potentially be used in polymer light-emitting diodes (PLEDs) as host molecules. These carbazole-based host molecules incorporated substituents with C or Si at their centers at the 3- and 6-positions on the carbazole moiety. Density functional theory calculations were performed to investigate the influence of the substituent on energy and charge transfer, and to predict whether each molecule could act as an effective host material in PLEDs. The results show that, for the series in which the carbazole moiety is linked to the substituent via the central C/Si atom ("cbz-sub series"), triplet-state electron transitions and triplet excitons arise from the carbazole moiety. Members of the cbz-sub series also exhibited higher triplet energies (ET) than the series in which the carbazole moiety is linked to the C/Si-centered substituent via an extra phenyl group ("cbz-ph-sub series"). Moreover, members of the cbz-sub series presented strong molecular orbital interactions and suitable singlet and triplet energy differences (ΔEST). Further investigations showed that, in each series, the presence of an Si atom was more likely to inhibit charge and exciton delocalization, and inserting a methyl or tert-butyl group at the 2- and 7-position, respectively, of the carbazole moiety in the cbz-ph-sub molecules improved their ET values and led to clear intramolecular charge-transfer character. A comparison of the energies of host and guest molecules showed that all of the molecules designed in this work are suitable for use with blue-light guest materials.
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Affiliation(s)
- Xiaguang Zhang
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, People's Republic of China
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20
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Zhang X, Shen W, Sun H, Yu P, He R, Li M. The DFT study on non-conjugated polymer host materials based on styrene derivatives for phosphorescent polymer light-emitting diodes. J PHYS ORG CHEM 2015. [DOI: 10.1002/poc.3448] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiaguang Zhang
- School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 China
| | - Wei Shen
- School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 China
| | - Huili Sun
- School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 China
| | - Pei Yu
- School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 China
| | - Rongxing He
- School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 China
| | - Ming Li
- School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 China
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21
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Liu XY, Long YT, Tian H. New insight into photo-induced electron transfer with a simple ubiquinone-based triphenylamine model. RSC Adv 2015. [DOI: 10.1039/c5ra09324d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
A ubiquinone-based triphenylamine system was designed as a simple model to study the photo-induced electron transfer (PET).
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Affiliation(s)
- Xiao-Yuan Liu
- Key Laboratory for Advanced Materials & Department of Chemistry
- East China University of Science and Technology
- Shanghai
- P. R. China
| | - Yi-Tao Long
- Key Laboratory for Advanced Materials & Department of Chemistry
- East China University of Science and Technology
- Shanghai
- P. R. China
| | - He Tian
- Key Laboratory for Advanced Materials & Department of Chemistry
- East China University of Science and Technology
- Shanghai
- P. R. China
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22
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Wang K, Wang S, Wei J, Miao Y, Zhang Z, Zhang Z, Liu Y, Wang Y. Structurally simple phenanthroimidazole-based bipolar hosts for high-performance green and red electroluminescent devices. RSC Adv 2015. [DOI: 10.1039/c5ra14570h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Two structurally simple and easily synthesized phenanthroimidazole-based bipolar-transporting host materials realized efficient green and red phosphorescent OLEDs with low efficiency roll-off.
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Affiliation(s)
- Kai Wang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Shipan Wang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Jinbei Wei
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Yang Miao
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Zhenyu Zhang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Zuolun Zhang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Yu Liu
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Yue Wang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
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23
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Kim M, Jeon SK, Hwang SH, Lee JY. Molecular design of triazine and carbazole based host materials for blue phosphorescent organic emitting diodes. Phys Chem Chem Phys 2015; 17:13553-8. [DOI: 10.1039/c5cp01676b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The triplet energy of the host was managed by inserting a methyl substituent in the phenyl linkage between triazine and carbazole.
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Affiliation(s)
- Mounggon Kim
- Department of Polymer Science and Engineering
- Dankook Univeristy
- Yongin-si
- Korea
| | - Sang Kyu Jeon
- School of Chemical Engineering
- Sungkyunkwan University
- Suwon-si
- Korea
| | - Seok-Ho Hwang
- Department of Polymer Science and Engineering
- Dankook Univeristy
- Yongin-si
- Korea
| | - Jun Yeob Lee
- School of Chemical Engineering
- Sungkyunkwan University
- Suwon-si
- Korea
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24
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Tang MC, Tsang DPK, Wong YC, Chan MY, Wong KMC, Yam VWW. Bipolar gold(III) complexes for solution-processable organic light-emitting devices with a small efficiency roll-off. J Am Chem Soc 2014; 136:17861-8. [PMID: 25495053 DOI: 10.1021/ja510622x] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new class of bipolar alkynylgold(III) complexes containing triphenylamine and benzimidazole moieties has been synthesized, characterized, and applied as phosphorescent dopants in the fabrication of solution-processable organic light-emitting devices (OLEDs). The incorporation of methyl groups in the central phenyl unit has been found to rigidify the molecule to reduce nonradiative decay, yielding a high photoluminescence quantum yield of up to 75% in spin-coated thin films. In addition, the realization of highly efficient solution-processable OLEDs with an extremely small external quantum efficiency (EQE) roll-off has been demonstrated. At practical brightness level of 1000 cd m(-2), the optimized devices exhibited a high EQE of up to 10.0% and an extremely small roll-off of less than 1%.
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Affiliation(s)
- Man-Chung Tang
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Pokfulam, Hong Kong
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25
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Zhao J, Lian M, Yu Y, Yan X, Xu X, Yang X, Zhou G, Wu Z. Novel Red Phosphorescent Polymers Bearing Both Ambipolar and Functionalized IrIIIPhosphorescent Moieties for Highly Efficient Organic Light-Emitting Diodes. Macromol Rapid Commun 2014; 36:71-8. [DOI: 10.1002/marc.201400490] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2014] [Revised: 09/28/2014] [Indexed: 01/24/2023]
Affiliation(s)
- Jiang Zhao
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter; State Key Laboratory for Mechanical Behavior of Materials; Institute of Chemistry for New Energy Material; Department of Chemistry; Faculty of Science; Xi'an Jiaotong University; Xi'an 710049 China
| | - Meng Lian
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter; State Key Laboratory for Mechanical Behavior of Materials; Institute of Chemistry for New Energy Material; Department of Chemistry; Faculty of Science; Xi'an Jiaotong University; Xi'an 710049 China
| | - Yue Yu
- Key Laboratory of Photonics Technology for Information; School of Electronic and Information Engineering; Xi'an Jiaotong University; Xi'an 710049 China
| | - Xiaogang Yan
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter; State Key Laboratory for Mechanical Behavior of Materials; Institute of Chemistry for New Energy Material; Department of Chemistry; Faculty of Science; Xi'an Jiaotong University; Xi'an 710049 China
| | - Xianbin Xu
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter; State Key Laboratory for Mechanical Behavior of Materials; Institute of Chemistry for New Energy Material; Department of Chemistry; Faculty of Science; Xi'an Jiaotong University; Xi'an 710049 China
| | - Xiaolong Yang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter; State Key Laboratory for Mechanical Behavior of Materials; Institute of Chemistry for New Energy Material; Department of Chemistry; Faculty of Science; Xi'an Jiaotong University; Xi'an 710049 China
| | - Guijiang Zhou
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter; State Key Laboratory for Mechanical Behavior of Materials; Institute of Chemistry for New Energy Material; Department of Chemistry; Faculty of Science; Xi'an Jiaotong University; Xi'an 710049 China
| | - Zhaoxin Wu
- Key Laboratory of Photonics Technology for Information; School of Electronic and Information Engineering; Xi'an Jiaotong University; Xi'an 710049 China
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26
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Saturated Red-Light-Emitting Gold(III) Triphenylamine Dendrimers for Solution-Processable Organic Light-Emitting Devices. Chemistry 2014; 20:15233-41. [DOI: 10.1002/chem.201404313] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Indexed: 11/07/2022]
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27
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New universal bipolar host materials with fluorene as non-conjugated bridge for multi-color electrophosphorescent devices. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.04.051] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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28
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Wang H, Xie L, Peng Q, Meng L, Wang Y, Yi Y, Wang P. Novel thermally activated delayed fluorescence materials-thioxanthone derivatives and their applications for highly efficient OLEDs. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:5198-5204. [PMID: 24903266 DOI: 10.1002/adma.201401393] [Citation(s) in RCA: 226] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 05/12/2014] [Indexed: 06/03/2023]
Abstract
Thermally activated delayed fluorescence emitters with small energy gap between the triplet and singlet (ΔEST ), TXO-PhCz and TXO-TPA, have been successfully synthesized by combining a hole-transporting TPA/PhCz moiety and an electron-transporting TXO moiety. Both compounds display efficient solid-state luminescence with an efficient up-conversion of the triplet to singlet. OLEDs based on them exhibt high performance up to 21.5%, which is among the best reported for OLEDs.
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Affiliation(s)
- Hui Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China; University of Chinese Academy of Sciences, Beijing, 100049, China
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29
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Jang HG, Kim BS, Lee JY, Hwang SH. Synthesis of dimesitylborane-substituted phenylcarbazoles as bipolar host materials and the variation of the green PHOLED performance with the substituent position of the boron atom. Dalton Trans 2014; 43:7712-5. [PMID: 24756171 DOI: 10.1039/c4dt00101j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two structural isomers of the bipolar host material containing the dimesitylborane moiety were synthesized and their device performance was investigated. The quantum efficiency of the devices depends on the substituent position of the dimesitylborane moiety. The maximum external quantum efficiency of the device reached as high as 23.8% with a green color coordinate of (0.30, 0.63).
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Affiliation(s)
- Hong-Gu Jang
- Department of Polymer Science and Engineering, Dankook University, Yongin, Gyeonggi 448-701, Republic of Korea.
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30
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Ho CL, Li H, Wong WY. Red to near-infrared organometallic phosphorescent dyes for OLED applications. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2013.09.035] [Citation(s) in RCA: 221] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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31
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Dumur F, Goubard F. Triphenylamines and 1,3,4-oxadiazoles: a versatile combination for controlling the charge balance in organic electronics. NEW J CHEM 2014. [DOI: 10.1039/c3nj01537h] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Jang HG, Jeon SK, Lee JY, Hwang SH. Synthesis and blue phosphorescent device performances of a new bipolar host material containing pyrazino[2,3-b]indole moiety. RSC Adv 2014. [DOI: 10.1039/c4ra10307f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Newly designed bipolar host material (CzPhPz) consisting of 5H-pyrazino[2,3-b]indole unit was synthesized and exhibited good electron transport properties with a high triplet energy of 2.83 eV for FIrpic-based blue PHOLEDs.
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Affiliation(s)
- Hong-Gu Jang
- Department of Polymer Science and Engineering
- Dankook University
- Yongin, Republic of Korea
| | - Sang Kyu Jeon
- Department of Polymer Science and Engineering
- Dankook University
- Yongin, Republic of Korea
| | - Jun Yeob Lee
- Department of Polymer Science and Engineering
- Dankook University
- Yongin, Republic of Korea
| | - Seok-Ho Hwang
- Department of Polymer Science and Engineering
- Dankook University
- Yongin, Republic of Korea
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33
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Chou SH, Hung WY, Chen CM, Liu QY, Liu YH, Wong KT. Manipulation of connecting topology in carbazole/benzimidazole universal bipolar host materials for RGB and White PhOLEDs. RSC Adv 2013. [DOI: 10.1039/c3ra42067a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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34
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Venkatakrishnan P, Natarajan P, Moorthy JN, Lin Z, Chow TJ. Twisted bimesitylene-based oxadiazoles as novel host materials for phosphorescent OLEDs. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.05.101] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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35
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Lin MS, Yang SJ, Chang HW, Huang YH, Tsai YT, Wu CC, Chou SH, Mondal E, Wong KT. Incorporation of a CN group into mCP: a new bipolar host material for highly efficient blue and white electrophosphorescent devices. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm32717a] [Citation(s) in RCA: 133] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Zhu M, Li Y, Li C, Zhong C, Yang C, Wu H, Qin J, Cao Y. Tuning the energy levels and photophysical properties of triphenylamine-featured iridium(iii) complexes: application in high performance polymer light-emitting diodes. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm30928a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Hung WY, Tu GM, Chen SW, Chi Y. Phenylcarbazole-dipyridyl triazole hybrid as bipolar host material for phosphorescent OLEDs. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm15963e] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Wu J, Liao Y, Wu SX, Li HB, Su ZM. Phenylcarbazole and phosphine oxide/sulfide hybrids as host materials for blue phosphors: effectively tuning the charge injection property without influencing the triplet energy. Phys Chem Chem Phys 2012; 14:1685-93. [DOI: 10.1039/c2cp23418a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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39
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Ho CL, Chi LC, Hung WY, Chen WJ, Lin YC, Wu H, Mondal E, Zhou GJ, Wong KT, Wong WY. Carbazole-based coplanar molecule (CmInF) as a universal host for multi-color electrophosphorescent devices. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c1jm13794h] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Bin JK, Yang J, Hong JI. New sulfur-containing host materials for blue phosphorescent organic light-emitting diodes. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm34165d] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Kwak J, Lyu YY, Lee H, Choi B, Char K, Lee C. New carbazole-based host material for low-voltage and highly efficient red phosphorescent organic light-emitting diodes. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm15138c] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Yan MK, Tao Y, Chen RF, Zheng C, An ZF, Huang W. Computational design and selection of optimal building blocks and linking topologies for construction of high-performance host materials. RSC Adv 2012. [DOI: 10.1039/c2ra21242k] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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43
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Lin MS, Chi LC, Chang HW, Huang YH, Tien KC, Chen CC, Chang CH, Wu CC, Chaskar A, Chou SH, Ting HC, Wong KT, Liu YH, Chi Y. A diarylborane-substituted carbazole as a universal bipolar host material for highly efficient electrophosphorescence devices. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c1jm13323c] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Gong S, He X, Chen Y, Jiang Z, Zhong C, Ma D, Qin J, Yang C. Simple CBP isomers with high triplet energies for highly efficient blue electrophosphorescence. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c1jm14903b] [Citation(s) in RCA: 99] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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45
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Synthesis of novel twisted carbazole–quinoxaline derivatives with 1,3,5-benzene core: bipolar molecules as hosts for phosphorescent OLEDs. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.10.074] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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46
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Gong S, Fu Q, Wang Q, Yang C, Zhong C, Qin J, Ma D. Highly efficient deep-blue electrophosphorescence enabled by solution-processed bipolar tetraarylsilane host with both a high triplet energy and a high-lying HOMO level. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:4956-4959. [PMID: 21959864 DOI: 10.1002/adma.201102758] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Indexed: 05/31/2023]
Affiliation(s)
- Shaolong Gong
- Department of Chemistry, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, P. R. China
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47
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Ku SY, Hung WY, Chen CW, Yang SW, Mondal E, Chi Y, Wong KT. Spiro-Configured Bipolar Host Materials for Highly Efficient Electrophosphorescent Devices. Chem Asian J 2011; 7:133-42. [DOI: 10.1002/asia.201100467] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Indexed: 11/07/2022]
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48
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Chaskar A, Chen HF, Wong KT. Bipolar host materials: a chemical approach for highly efficient electrophosphorescent devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:3876-3895. [PMID: 21805507 DOI: 10.1002/adma.201101848] [Citation(s) in RCA: 171] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Indexed: 05/31/2023]
Abstract
The future of organic light-emitting devices (OLEDs) is drifting from electrofluorescence toward electrophosphorescence due to the feasibility of realizing 100% internal quantum efficiency. There is limited availability of transition metals (TMs) such as Ir, Os, and Pt, which are used for color-tunable phosphorescent emitters, and the use of the host-guest strategy is necessary for suppressing the detrimental triplet-triplet annihilation inherently imparted by the TM-centered emitters. The inevitable demands of organic host materials provide organic chemists with tremendous opportunities to contribute their expertise to this technology. With suitable molecular design and judicious selection of chemical structures featured with different electronic nature, the incorporation of hole-transporting (HT) and electron-transporting (ET) moieties combines the advantages of both functional units into bipolar host materials, which perform balanced injection/transportation/recombination of charge carriers and consequentially lead the OLEDs to have higher performances and low roll-off efficiencies. This review highlights recently developed bipolar host materials with the focus on molecular design strategies and the structure-property-performance relationships of various classes of bipolar host materials, which are classified into several categories according to the structural features of their constituents (HT/ET blocks and spacers).
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Affiliation(s)
- Atul Chaskar
- Department of Chemistry, National Taiwan University, Taipei, Taiwan
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49
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Fan CH, Sun P, Su TH, Cheng CH. Host and dopant materials for idealized deep-red organic electrophosphorescence devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:2981-2985. [PMID: 21567483 DOI: 10.1002/adma.201100610] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Revised: 04/13/2011] [Indexed: 05/30/2023]
Affiliation(s)
- Chun-Hsiang Fan
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
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50
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Kim DH, Cho NS, Oh HY, Yang JH, Jeon WS, Park JS, Suh MC, Kwon JH. Highly efficient red phosphorescent dopants in organic light-emitting devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:2721-2726. [PMID: 21495090 DOI: 10.1002/adma.201100405] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Indexed: 05/30/2023]
Affiliation(s)
- Do Han Kim
- LG Display R&D Center, 1007 Deogeun-ri, Wollong-myeon, Paju-si, Gyeonggi-do 413-811, Republic of Korea
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