High-Quality All-Inorganic Perovskite CsPbBr3 Quantum Dots Emitter Prepared by a Simple Purified Method and Applications of Light-Emitting Diodes
| Autor: | Zi-Jun Lin, Lung-Chien Chen, Zong Liang Tseng, Ching-Ho Tien, Kun-Yi Lee, Yu-Shen Dong |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
perovskite CsPbBr3
Control and Optimization Photoluminescence Materials science Energy Engineering and Power Technology quantum dots 02 engineering and technology 010402 general chemistry 01 natural sciences lcsh:Technology law.invention Condensed Matter::Materials Science law Emission spectrum Electrical and Electronic Engineering Engineering (miscellaneous) Diode Perovskite (structure) all-inorganic halide perovskite Renewable Energy Sustainability and the Environment business.industry lcsh:T 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 0104 chemical sciences Active layer quantum dot light-emitting diodes Quantum dot Optoelectronics Orthorhombic crystal system 0210 nano-technology business Energy (miscellaneous) Light-emitting diode |
| Zdroj: | Energies Volume 12 Issue 18 Energies, Vol 12, Iss 18, p 3507 (2019) |
| ISSN: | 1996-1073 |
| DOI: | 10.3390/en12183507 |
| Popis: | High-quality perovskite CsPbBr3 quantum dots (QDs-CsPbBr3) were prepared using the ultrasonic oscillation method, which is simple and provides variable yield according to requirements. The emission spectra over a large portion of the visible spectral region (450&ndash 650 nm) of QD-CsPbX3 (X = Cl, Br, and I) have tunable compositions that can be halide exchanged using the halide anion exchange technique and quantum size-effects. A strong peak with high intensity of (200) lattice plane of purified QDs-CsPbBr3 film is obtained, confirming the formation of an orthorhombic perovskite crystal structure of the Pnma space group. The photoluminescence of QDs-CsPbBr3 was characterized using a narrow line-width emission of 20 nm, with high quantum yields of up to 99.2%, and radioactive lifetime increasing to 26 ns. Finally, through the excellent advantages of QDs-CsPbBr3 mentioned above, purified perovskite QDs-CsPbBr3 as an active layer was utilized in perovskite quantum dot light-emitting diodes structure applications. As a result, the perovskite QDs-CsPbBr3 light-emitting diodes (LEDs) exhibits a turn-on voltage of 7 V and a maximum luminance of 5.1 cd/m2. |
| Databáze: | OpenAIRE |
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