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Bae SR, Seol MJ, Kim SY. CsPbBr 3 and Cs 4PbBr 6 perovskite light-emitting diodes using a thermally evaporated host-dopant system. NANOSCALE 2023. [PMID: 37183829 DOI: 10.1039/d3nr01190a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
This article shows the results of fabricating a device through vacuum deposition by synthesizing a perovskite thin film in the powder form. Light emitting diodes (LEDs) were fabricated using a single-source and host-dopant system of the perovskite produced in the powder form. Both CsPbBr3 and Cs4PbBr6 used in the host-dopant system were green, and the host was tris(8-quinolinolato) aluminum(III). It is confirmed that the display efficiency and optical characteristics are significantly improved by the dopant ratio. The 3%-doped CsPbBr3 based LED shows a luminance of 9083 cd m-2, 3.36% external quantum efficiency (EQE), and 96% photoluminescence quantum yield (PLQY) efficiency (for the undoped CsPbBr3 LED, luminance: 844 cd m-2/EQE: 1.93%/PLQY: 85%). The LED based on 5%-doped Cs4PbBr6 shows a luminance of 11 440 cd m-2, an EQE of 6.27%, and 99% PLQY efficiency (for the undoped Cs4PbBr6 LED, luminance:1113 cd m-2/EQE: 1.64%/PLQY: 93%). It is expected that the results of this research will contribute to the perovskite LED research performed by thermal evaporation in the future.
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Affiliation(s)
- Sa-Rang Bae
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
| | - Myeong Jin Seol
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
| | - Soo Young Kim
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
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Rao L, Sun B, Liu Y, Zhong G, Wen M, Zhang J, Fu T, Wang S, Wang F, Niu X. Highly Stable and Photoluminescent CsPbBr 3/Cs 4PbBr 6 Composites for White-Light-Emitting Diodes and Visible Light Communication. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:355. [PMID: 36678108 PMCID: PMC9861840 DOI: 10.3390/nano13020355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/29/2022] [Accepted: 01/12/2023] [Indexed: 06/17/2023]
Abstract
Inorganic lead halide perovskite is one of the most excellent fluorescent materials, and it plays an essential role in high-definition display and visible light communication (VLC). Its photochromic properties and stability determine the final performance of light-emitting devices. However, efficiently synthesizing perovskite with high quality and stability remains a significant challenge. Here, we develop a facile and environmentally friendly method for preparing high-stability and strong-emission CsPbBr3/Cs4PbBr6 composites using ultrasonication and liquid paraffin. Tuning the contents of liquid paraffin, bright-emission CsPbBr3/Cs4PbBr6 composite powders with a maximum PLQY of 74% were achieved. Thanks to the protection of the Cs4PbBr6 matrix and liquid paraffin, the photostability, thermostability, and polar solvent stability of CsPbBr3/Cs4PbBr6-LP are significantly improved compared to CsPbBr3 quantum dots and CsPbBr3/Cs4PbBr6 composites that were prepared without liquid paraffin. Moreover, the fabricated CsPbBr3/Cs4PbBr6-LP-based WLEDs show excellent luminescent performance with a power efficiency of 129.5 lm/W and a wide color gamut, with 121% of the NTSC and 94% of the Rec. 2020, demonstrating a promising candidate for displays. In addition, the CsPbBr3/Cs4PbBr6-LP-based WLEDs were also demonstrated in a VLC system. The results suggested the great potential of these high-performance WLEDs as an excitation light source to achieve VLC.
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Affiliation(s)
- Longshi Rao
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
| | - Bin Sun
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
| | - Yang Liu
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
| | - Guisheng Zhong
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
| | - Mingfu Wen
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
| | - Jiayang Zhang
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
| | - Ting Fu
- Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
| | - Shuangxi Wang
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
| | - Fengtao Wang
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
| | - Xiaodong Niu
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
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