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Rawat SS, Rana A, Swami SK, Srivastava R, Suman CK. Investigation of negative magneto-conductance properties of cobalt phthalocyanine thin films. SN Appl Sci 2020. [DOI: 10.1007/s42452-020-2405-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Braveenth R, Bae HW, Nguyen QPB, Ko HM, Lee CH, Kim HJ, Kwon JH, Chai KY. Spirobifluorene Core-Based Novel Hole Transporting Materials for Red Phosphorescence OLEDs. Molecules 2017; 22:molecules22030464. [PMID: 28335435 PMCID: PMC6155350 DOI: 10.3390/molecules22030464] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 03/07/2017] [Accepted: 03/12/2017] [Indexed: 11/18/2022] Open
Abstract
Two new hole transporting materials, named HTM 1A and HTM 1B, were designed and synthesized in significant yields using the well-known Buchwald Hartwig and Suzuki cross- coupling reactions. Both materials showed higher decomposition temperatures (over 450 °C) at 5% weight reduction and HTM 1B exhibited a higher glass transition temperature of 180 °C. Red phosphorescence-based OLED devices were fabricated to analyze the device performances compared to Spiro-NPB and NPB as reference hole transporting materials. Devices consist of hole transporting material as HTM 1B showed better maximum current and power efficiencies of 16.16 cd/A and 11.17 lm/W, at the same time it revealed an improved external quantum efficiency of 13.64%. This efficiency is considerably higher than that of Spiro-NPB and NPB-based reference devices.
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Affiliation(s)
- Ramanaskanda Braveenth
- Division of Bio-Nanochemistry, College of Natural Sciences, Wonkwang University, Chonbuk, Iksan 570-749, Korea.
| | - Hyeong Woo Bae
- Department of Information Display, Kyung Hee University, Dongdaemoon-gu, Seoul 130-701, Korea.
| | - Quynh Pham Bao Nguyen
- Division of Bio-Nanochemistry, College of Natural Sciences, Wonkwang University, Chonbuk, Iksan 570-749, Korea.
| | - Haye Min Ko
- Division of Bio-Nanochemistry, College of Natural Sciences, Wonkwang University, Chonbuk, Iksan 570-749, Korea.
| | - Choong Hun Lee
- Division of Microelectronics and Display Technology, Wonkwang University, Iksan 570-749, Korea.
- Solar Cell Research Institute, Next Generation Industrial Radiation Technology RIC, Wonkwang University, Iksan 570-749, Korea.
- Department of Carbon Fusion Engineering, Wonkwang University, Iksan 570-749, Korea.
| | - Hyeong Jun Kim
- Division of Microelectronics and Display Technology, Wonkwang University, Iksan 570-749, Korea.
| | - Jang Hyuk Kwon
- Department of Information Display, Kyung Hee University, Dongdaemoon-gu, Seoul 130-701, Korea.
| | - Kyu Yun Chai
- Division of Bio-Nanochemistry, College of Natural Sciences, Wonkwang University, Chonbuk, Iksan 570-749, Korea.
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