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Bezvikonnyi O, Durgaryan R, Tamulevicius T, Volyniuk D, Jurkeviciute A, Simokaitiene J, Danyliv Y, Vardanyan S, Macionis S, Vidas Grazulevicius J. Effects of carbazolyl and diphenylamino substituents bearing methoxy groups on the performance of hole-transporting materials in OLEDs. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 321:124713. [PMID: 38943758 DOI: 10.1016/j.saa.2024.124713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 05/07/2024] [Accepted: 06/24/2024] [Indexed: 07/01/2024]
Abstract
Newly designed and synthesized derivatives of pentaphenylbenzene with methoxy-substituted carbazolyl or diphenylamino moieties were investigated to estimate their applicability as hole transport materials. Both the compounds exhibit high thermal stability. The intramolecular charge transfer is blocked for the film of the compound containing diphenylamino groups. The intermolecular charge transfer is induced in the film of carbazolyl-containing compound. The derivative of pentaphenylbenzene and diphenylamine exhibits higher hole drift mobility (2.4·10-3 cm2/V·s at the electric field of 5.5·105 V/cm) and by 0.1 eV lower ionization potential than the carbazolyl-containing compound. Both the compounds were utilized as hole-transporting materials in a series of organic light emitting diodes (OLEDs) based on of thermally activated delayed fluorescence. With the maximum values of external quantum efficiency of 25.9 % and power efficiency of 43.4 lm/W, OLEDs containing the layers of the synthesized compounds outperformed the device based on TCTA by 4 %, without the change in spectral properties. Variable angle spectroscopic ellipsometry revealed the moderate average roughness of the films of the compound deposited by the thermal vacuum evaporation technique with an arithmetic mean deviation of not more than 0.8 nm. The prominent hole transport characteristics of the compounds make them good candidates for utilization in optoelectronic devices.
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Affiliation(s)
- Oleksandr Bezvikonnyi
- Department of Physics, Faculty of Mathematics and Natural Sciences, Kaunas University of Technology, Studentų g. 50, LT-51368 Kaunas, Lithuania; Department of Polymer Chemistry and Technology, Faculty of Chemical Technology, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania.
| | - Ranush Durgaryan
- Department of Polymer Chemistry and Technology, Faculty of Chemical Technology, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania; Department of Organic Chemistry, Faculty of Chemistry, Yerevan State University, A. Manoogian 1, 0025 Yerevan, Armenia; Department of Chemistry - Ångström Laboratory, Physical Chemistry, Uppsala University, Ångströmlaboratoriet, Lägerhyddsvägen 1, 751 20 Uppsala, Sweden
| | - Tomas Tamulevicius
- Department of Physics, Faculty of Mathematics and Natural Sciences, Kaunas University of Technology, Studentų g. 50, LT-51368 Kaunas, Lithuania; Institute of Materials Science, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania
| | - Dmytro Volyniuk
- Department of Polymer Chemistry and Technology, Faculty of Chemical Technology, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania
| | - Ausrine Jurkeviciute
- Institute of Materials Science, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania
| | - Jurate Simokaitiene
- Department of Polymer Chemistry and Technology, Faculty of Chemical Technology, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania
| | - Yan Danyliv
- Department of Electronic Engineering, Institute of Telecommunications, Radioelectronics and Electronic Engineering, Lviv Polytechnic National University, Stepan Bandera 12, 79013 Lviv, Ukraine
| | - Shushanna Vardanyan
- Department of Polymer Chemistry and Technology, Faculty of Chemical Technology, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania; Department of Organic Chemistry, Faculty of Chemistry, Yerevan State University, A. Manoogian 1, 0025 Yerevan, Armenia
| | - Simas Macionis
- Department of Polymer Chemistry and Technology, Faculty of Chemical Technology, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania
| | - Juozas Vidas Grazulevicius
- Department of Polymer Chemistry and Technology, Faculty of Chemical Technology, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania.
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2
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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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3
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Chen YS, Lin IH, Huang HY, Liu SW, Hung WY, Wong KT. Exciplex-forming cohost systems with 2,7-dicyanofluorene acceptors for high efficiency red and deep-red OLEDs. Sci Rep 2024; 14:2458. [PMID: 38291066 PMCID: PMC10827723 DOI: 10.1038/s41598-024-52680-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 01/21/2024] [Indexed: 02/01/2024] Open
Abstract
Two 2,7-dicyaonfluorene-based molecules 27-DCN and 27-tDCN are utilized as acceptors (A) to combine with hexaphenylbenzene-centered donors (D) TATT and DDT-HPB for probing the exciplex formation. The photophysical characteristics reveal that the steric hindered 27-tDCN not only can increase the distance of D and A, resulting in a hypsochromic emission, but also dilute the concentration of triplet excitons to suppress non-radiative process. The 27-tDCN-based exciplex-forming blends exhibit better photoluminescence quantum yield (PLQY) as compared to those of 27-DCN-based pairs. In consequence, among these D:A blends, the device employing DDT-HPB:27-tDCN blend as the emissiom layer (EML) exhibits the best EQE of 3.0% with electroluminescence (EL) λmax of 542 nm. To further utilize the exciton electrically generated in exciplex-forming system, two D-A-D-configurated fluorescence emitter DTPNT and DTPNBT are doped into the DDT-HPB:27-tDCN blend. The nice spectral overlap ensures fast and efficient Förster energy transfer (FRET) process between the exciplex-forming host and the fluorescent quests. The red device adopting DDT-HPB:27-tDCN:10 wt% DTPNT as the EML gives EL λmax of 660 nm and maximum external quantum efficiency (EQEmax) of 5.8%, while EL λmax of 685 nm and EQE of 5.0% for the EML of DDT-HPB:27-tDCN:10 wt% DTPNBT. This work manifests a potential strategy to achieve high efficiency red and deep red OLED devices by incorporating the highly fluorescent emitters to extract the excitons generated by the exciplex-forming blend with bulky acceptor for suppressing non-radiative process.
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Affiliation(s)
- Yi-Sheng Chen
- Organic Electronic Research Center, Ming Chi University of Technology, New Taipei City, 24031, Taiwan
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | - I-Hung Lin
- Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Hsin-Yuan Huang
- Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Shun-Wei Liu
- Organic Electronic Research Center, Ming Chi University of Technology, New Taipei City, 24031, Taiwan
| | - Wen-Yi Hung
- Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung, 20224, Taiwan.
| | - Ken-Tsung Wong
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan.
- Institute of Atomic and Molecular Science Academia Sinica, Taipei, 10617, Taiwan.
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Sasabe H, Araki S, Abe S, Ito N, Kumada K, Noda T, Sukegawa Y, Yokoyama D, Kido J. Four Dibenzofuran‐Terminated High‐Triplet‐Energy Hole Transporters for High‐Efficiency and Long‐Life Organic Light‐Emitting Devices. Chemistry 2022; 28:e202104408. [DOI: 10.1002/chem.202104408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Indexed: 11/11/2022]
Affiliation(s)
- Hisahiro Sasabe
- Department of Organic Materials Science Yamagata University 4-3-16 Jonan, Yonezawa Yamagata 992-8510 Japan
- Research Center of Organic Electronics (ROEL) Yamagata University 4-3-16 Jonan, Yonezawa Yamagata 992-8510 Japan
- Frontier Center for Organic Materials (FROM) Yamagata University 4-3-16 Jonan, Yonezawa Yamagata 992-8510 Japan
| | - Suguru Araki
- Department of Organic Materials Science Yamagata University 4-3-16 Jonan, Yonezawa Yamagata 992-8510 Japan
| | - Shoki Abe
- Department of Organic Materials Science Yamagata University 4-3-16 Jonan, Yonezawa Yamagata 992-8510 Japan
| | - Nozomi Ito
- Department of Organic Materials Science Yamagata University 4-3-16 Jonan, Yonezawa Yamagata 992-8510 Japan
| | - Kengo Kumada
- Department of Organic Materials Science Yamagata University 4-3-16 Jonan, Yonezawa Yamagata 992-8510 Japan
| | - Taito Noda
- Department of Organic Materials Science Yamagata University 4-3-16 Jonan, Yonezawa Yamagata 992-8510 Japan
| | - Yoshihito Sukegawa
- Department of Organic Materials Science Yamagata University 4-3-16 Jonan, Yonezawa Yamagata 992-8510 Japan
| | - Daisuke Yokoyama
- Department of Organic Materials Science Yamagata University 4-3-16 Jonan, Yonezawa Yamagata 992-8510 Japan
- Research Center of Organic Electronics (ROEL) Yamagata University 4-3-16 Jonan, Yonezawa Yamagata 992-8510 Japan
| | - Junji Kido
- Department of Organic Materials Science Yamagata University 4-3-16 Jonan, Yonezawa Yamagata 992-8510 Japan
- Research Center of Organic Electronics (ROEL) Yamagata University 4-3-16 Jonan, Yonezawa Yamagata 992-8510 Japan
- Frontier Center for Organic Materials (FROM) Yamagata University 4-3-16 Jonan, Yonezawa Yamagata 992-8510 Japan
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5
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Devibala P, Balambiga B, Noureen S, Nagarajan S. Hexaarylbenzene based high-performance p-channel molecules for electronic applications. RSC Adv 2021; 11:11672-11701. [PMID: 35423632 PMCID: PMC8696071 DOI: 10.1039/d1ra00217a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 03/10/2021] [Indexed: 01/20/2023] Open
Abstract
Hexaarylbenzene-based molecules find potential applications in organic electronics due to wider energy gap, high HOMO level, higher photoconductivity, electron-rich nature, and high hole-transporting property. Due to the unique propeller structure, these molecules show low susceptibility towards self-aggregation. This property can be tailored by proper molecular engineering by the incorporation of appropriate groups. Therefore, hexaarylbenzene chromophores are widely used as the materials for high-efficiency light-emitting materials, charge transport materials, host materials, redox materials, photochemical switches, and molecular receptors. This review highlights the diverse structural modification techniques used for the synthesis of symmetrical and unsymmetrical structures. Also, the potential applications of these molecules in organic light-emitting diodes, organic field-effect transistors, organic photovoltaics, organic memory devices, and logic circuits are discussed.
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Affiliation(s)
- Panneerselvam Devibala
- Organic Electronics Division, Department of Chemistry, Central University of Tamil Nadu Thiruvarur 610 005 India
| | - Balu Balambiga
- Organic Electronics Division, Department of Chemistry, Central University of Tamil Nadu Thiruvarur 610 005 India
| | - Shana Noureen
- Organic Electronics Division, Department of Chemistry, Central University of Tamil Nadu Thiruvarur 610 005 India
| | - Samuthira Nagarajan
- Organic Electronics Division, Department of Chemistry, Central University of Tamil Nadu Thiruvarur 610 005 India
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6
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Arai A, Sasabe H, Nakao K, Masuda Y, Kido J. π-Extended Carbazole Derivatives as Host Materials for Highly Efficient and Long-Life Green Phosphorescent Organic Light-Emitting Diodes. Chemistry 2021; 27:4971-4976. [PMID: 33372324 DOI: 10.1002/chem.202005144] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/22/2020] [Indexed: 01/22/2023]
Abstract
High-performance organic light-emitting diodes (OLEDs) that use phosphorescent and/or thermally activated delayed fluorescence emitters are capable of realizing 100 % electron-to-photon conversion. The host materials in these OLEDs play crucial roles in determining OLED performance. Carbazole derivatives are frequently used as host materials, among which 3,3-bis(9H-carbazol-9-yl)biphenyl (mCBP) is often used for lifetime testing in scientific studies. In this study, the π conjugation of the carbazole unit was expanded to enhance OLED lifetime by designing and developing two benzothienocarbazole (BTCz)-based host materials, namely m1BTCBP and m4BTCBP. Among these host materials, m1BTCBP formed a highly efficient [Ir(ppy)3 ]-based OLED with an operational luminescence half-life (LT50 ) of over 300 h at an initial luminance of approximately 12000 cd m-2 (current density: 25 mA cm-2 ). The LT50 value at 1000 cd cm-2 was estimated to be about 23 000 h. This performance is clearly higher than that of mCBP-based OLEDs (LT50 ≈8500 h).
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Affiliation(s)
- Ayato Arai
- Department of Organic Materials Science, Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Hisahiro Sasabe
- Department of Organic Materials Science, Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan.,Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan.,Frontier Center for Organic Materials (FROM), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Kohei Nakao
- Department of Organic Materials Science, Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Yuki Masuda
- Department of Organic Materials Science, Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Junji Kido
- Department of Organic Materials Science, Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan.,Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan.,Frontier Center for Organic Materials (FROM), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan
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7
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Maruyama T, Sasabe H, Watanabe Y, Owada T, Yoshioka R, Saito Y, Kawano T, Kido J. Dibenzothiophene/Terpyridine Conjugated Asymmetric Electron-Transporters for High-efficiency and Long-life Green Phosphorescent OLEDs. CHEM LETT 2021. [DOI: 10.1246/cl.200803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tomohiro Maruyama
- Department of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Hisahiro Sasabe
- Department of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
- Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
- Frontier Center for Organic Materials (FROM), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Yuichiro Watanabe
- Frontier Center for Organic Materials (FROM), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Tsukasa Owada
- Department of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Ryo Yoshioka
- Department of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Yu Saito
- Department of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Tomoya Kawano
- Department of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Junji Kido
- Department of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
- Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
- Frontier Center for Organic Materials (FROM), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
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8
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Lee HL, Oh CS, Lee KH, Lee JY, Hong WP. Lifetime-Extending 3-(4-Phenylbenzo[4,5]thieno[3,2- d]pyrimidin-2-yl)benzonitrile Acceptor for Thermally Activated Delayed Fluorescence Emitters. ACS APPLIED MATERIALS & INTERFACES 2021; 13:2908-2918. [PMID: 33404213 DOI: 10.1021/acsami.0c17819] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Highly efficient and long-living green thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs) were developed using benzothienopyrimidine-4-benzonitrile acceptor-derived compounds as the TADF emitters. A molecular design merging the benzothienopyrimidine-4-benzonitrile acceptor with either indolocarbazole or diindolocarbazole was employed to prepare two TADF emitters, 5-(2-phenylbenzo[4,5]thieno[3,2-d]pyrimidin-4-yl)-2-(5-phenylindolo[3,2-a]carbazol-12(5H)-yl)benzonitrile and 2-(10,15-diphenyl-10,15-dihydro-5H-diindolo[3,2-a:3',2'-c]carbazol-5-yl)-5-(2-phenylbenzo[4,5]thieno[3,2-d]pyrimidin-4-yl)benzonitrile (BTPDIDCz), as the green and greenish-yellow emitters. Among the two emitters, BTPDIDCz with the diindolocarbazole donor combined with the benzothienopyrimidine-4-benzonitrile acceptor demonstrated a high external quantum efficiency of 24.5% and 3 times longer device lifetime than the state-of-the-art green emitter. This work proposed the potential of benzothienopyrimidine-4-benzonitrile as the acceptor for long lifetime in TADF emitters.
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Affiliation(s)
- Ha Lim Lee
- School of Chemical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 440-746, Korea
| | - Chan Seok Oh
- School of Chemical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 440-746, Korea
| | - Kyung Hyung Lee
- School of Chemical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 440-746, Korea
| | - Jun Yeob Lee
- School of Chemical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 440-746, Korea
| | - Wan Pyo Hong
- School of Advanced Material and Chemical Engineering, Daegu Catholic University, 13-13, Hayang-ro, Hayang-eup, Gyeonsan-si, Gyeongbuk 38430, Korea
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Sudheendran Swayamprabha S, Dubey DK, Shahnawaz, Yadav RAK, Nagar MR, Sharma A, Tung F, Jou J. Approaches for Long Lifetime Organic Light Emitting Diodes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 8:2002254. [PMID: 33437576 PMCID: PMC7788592 DOI: 10.1002/advs.202002254] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 08/26/2020] [Indexed: 06/14/2023]
Abstract
Organic light emitting diodes (OLEDs) have been well known for their potential usage in the lighting and display industry. The device efficiency and lifetime have improved considerably in the last three decades. However, for commercial applications, operational lifetime still lies as one of the looming challenges. In this review paper, an in-depth description of the various factors which affect OLED lifetime, and the related solutions is attempted to be consolidated. Notably, all the known intrinsic and extrinsic degradation phenomena and failure mechanisms, which include the presence of dark spot, high heat during device operation, substrate fracture, downgrading luminance, moisture attack, oxidation, corrosion, electron induced migrations, photochemical degradation, electrochemical degradation, electric breakdown, thermomechanical failures, thermal breakdown/degradation, and presence of impurities within the materials and evaporator chamber are reviewed. Light is also shed on the materials and device structures which are developed in order to obtain along with developed materials and device structures to obtain stable devices. It is believed that the theme of this report, summarizing the knowledge of mechanisms allied with OLED degradation, would be contributory in developing better-quality OLED materials and, accordingly, longer lifespan devices.
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Affiliation(s)
| | - Deepak Kumar Dubey
- Department of Materials Science and EngineeringNational Tsing Hua UniversityHsinchu30013Taiwan, Republic of China
| | - Shahnawaz
- Department of Materials Science and EngineeringNational Tsing Hua UniversityHsinchu30013Taiwan, Republic of China
| | - Rohit Ashok Kumar Yadav
- Department of Materials Science and EngineeringNational Tsing Hua UniversityHsinchu30013Taiwan, Republic of China
| | - Mangey Ram Nagar
- Department of Materials Science and EngineeringNational Tsing Hua UniversityHsinchu30013Taiwan, Republic of China
| | - Aayushi Sharma
- Birla Institute of Technology & Science‐PilaniShamirpet‐Keesara Road, Jawahar Nagar, ShameerpetHyderabadTelangana500078India
| | - Fu‐Ching Tung
- Department of Solid State Lighting TechnologyMechanical and Mechatronics Systems Research Labs.Industrial Technology and Research InstituteHsinchu31057Taiwan, Republic of China
| | - Jwo‐Huei Jou
- Department of Materials Science and EngineeringNational Tsing Hua UniversityHsinchu30013Taiwan, Republic of China
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Kikuchi T, Sasabe H, Watanabe Y, Kamata T, Katagiri H, Kido J. A Novel Series of Thermally and Electrically Stable Hole-transporters End-capped by [1]Benzothieno[3,2- b][1]benzothiophenes for Organic Light-emitting Devices. CHEM LETT 2019. [DOI: 10.1246/cl.180962] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Takayoshi Kikuchi
- Department of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Hisahiro Sasabe
- Department of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
- Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
- Frontier Center for Organic Materials (FROM), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Yuichiro Watanabe
- Frontier Center for Organic Materials (FROM), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Takahiro Kamata
- Department of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Hiroshi Katagiri
- Department of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
- Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
- Frontier Center for Organic Materials (FROM), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Junji Kido
- Department of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
- Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
- Frontier Center for Organic Materials (FROM), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
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11
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Liao J, Kojima T, Takahashi S, Hiraoka S. Gram-Scale Synthesis of a C
2v
-Symmetric Hexaphenylbenzene with Three Different Types of Substituents. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800448] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jingyuan Liao
- Department of Basic Science, Graduate School of Arts and Sciences; The University of Tokyo 3-8-1 Komaba, Meguro-ku; Tokyo 153-8902 Japan
| | - Tatsuo Kojima
- Department of Basic Science, Graduate School of Arts and Sciences; The University of Tokyo 3-8-1 Komaba, Meguro-ku; Tokyo 153-8902 Japan
| | - Satoshi Takahashi
- Department of Basic Science, Graduate School of Arts and Sciences; The University of Tokyo 3-8-1 Komaba, Meguro-ku; Tokyo 153-8902 Japan
| | - Shuichi Hiraoka
- Department of Basic Science, Graduate School of Arts and Sciences; The University of Tokyo 3-8-1 Komaba, Meguro-ku; Tokyo 153-8902 Japan
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Drev M, Grošelj U, Ledinek B, Perdih F, Svete J, Štefane B, Požgan F. Ruthenium(II)-Catalyzed Microwave-Promoted Multiple C-H Activation in Synthesis of Hexa(heteroaryl)benzenes in Water. Org Lett 2018; 20:5268-5273. [PMID: 30130120 DOI: 10.1021/acs.orglett.8b02169] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A series of hexa(heteroaryl)benzenes were synthesized by the Ru(II)-carboxylate-catalyzed multiple C-H activation of benzenes carrying pyridyl, pyrimidyl, or pyrazolyl directing groups using N-heteroaryl bromides as coupling partners. The reactions proceeded with high selectivity under microwave irradiation in water. Iterative penta-arylation could be implemented via activation of C-H bonds of generated intermediates by cascade chelation assistance of in situ installed pyridyl groups. This strategy provides multidentate ligands for selective complexation of transition metals and potential building of photoredox systems.
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Affiliation(s)
- Miha Drev
- Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113 , SI-1000 Ljubljana , Slovenia
| | - Uroš Grošelj
- Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113 , SI-1000 Ljubljana , Slovenia
| | - Bine Ledinek
- Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113 , SI-1000 Ljubljana , Slovenia
| | - Franc Perdih
- Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113 , SI-1000 Ljubljana , Slovenia
| | - Jurij Svete
- Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113 , SI-1000 Ljubljana , Slovenia
| | - Bogdan Štefane
- Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113 , SI-1000 Ljubljana , Slovenia
| | - Franc Požgan
- Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113 , SI-1000 Ljubljana , Slovenia
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Fukagawa H. Molecular Design and Device Design to Improve Stabilities of Organic Light-Emitting Diodes. J PHOTOPOLYM SCI TEC 2018. [DOI: 10.2494/photopolymer.31.315] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hirohiko Fukagawa
- Japan Broadcasting Corporation (NHK), Science & Technology Research Laboratories
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