| Autor: |
Zhang, Xiaoman, Zheng, Yehua, Nie, Kun, Zhang, Xiaodong, Duan, Xiuqiang, Hu, Ziyao, Yang, Ming, Mei, Lefu, Wang, Luoxin, Wang, Hua, Li, Mingquan, Ma, Xiaoxue |
| Zdroj: |
Journal of Materials Chemistry C; 1/7/2025, Vol. 13 Issue 1, p456-464, 9p |
| Abstrakt: |
Lead-free double perovskites are environmentally friendly, and their good photoelectric efficiency has received widespread attention. However, the stability and efficiency of lead-free perovskites need to be further improved to meet the growing application needs. In this study, thermally quenched perovskite (Cs2NaHoCl6) crystals (PCs) were successfully synthesized by co-precipitation. By doping with Sb3+, the excitation wavelength of the original perovskite increased significantly to 250–360 nm, and the emission wavelength of the original perovskite also increased significantly to 660 nm. Cs2NaHoCl6:Sb3+ PCs are made of red and white light-emitting diodes (LEDs) for general lighting applications. In addition, Cs2NaHoCl6:Sb3+ PCs are made into flexible luminescent fibers with aramid/polyphenylene sulfide (ACFs/PPS) composite fibers. Based on the good thermal quenching resistance of Cs2NaHoCl6:Sb3+ PCs, the flexible luminescent fibers showed excellent high-temperature luminescence stability. At 125 °C, flexible luminescent fibers retained 99.8% of the original luminescence intensity; at 250 °C, they retained 75.6% of the original. These flexible luminescent fibers have the potential to be used in fluorescence detection in high-temperature environments. In summary, this study used a simple method to prepare lead-free perovskites with good optical properties and stability, expanding the application of perovskites in the field of fibers. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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