High stability of robust anti-thermal-quenching lead-free double perovskite crystals for optoelectronic devices and high-performance fibers†

IF 5.7 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Xiaoman Zhang, Yehua Zheng, Kun Nie, Xiaodong Zhang, Xiuqiang Duan, Ziyao Hu, Ming Yang, Lefu Mei, Luoxin Wang, Hua Wang, Mingquan Li and Xiaoxue Ma
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Abstract

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 Image

用于光电器件和高性能纤维的抗热猝灭无铅双钙钛矿晶体的高稳定性
无铅双钙钛矿环境友好,其良好的光电效率受到广泛关注。然而,无铅钙钛矿的稳定性和效率需要进一步提高,以满足日益增长的应用需求。本研究采用共沉淀法成功合成了热淬钙钛矿(Cs2NaHoCl6)晶体。Sb3+掺杂后,原钙钛矿的激发波长显著增加至250 ~ 360 nm,原钙钛矿的发射波长也显著增加至660 nm。Cs2NaHoCl6:Sb3+ pc由红色和白色发光二极管(led)制成,用于一般照明应用。此外,用芳纶/聚苯硫醚(ACFs/PPS)复合纤维将Cs2NaHoCl6:Sb3+ PCs制成柔性发光纤维。基于Cs2NaHoCl6:Sb3+ PCs良好的耐热猝灭性,该柔性发光纤维表现出优异的高温发光稳定性。125℃时,柔性发光纤维的发光强度保持原来的99.8%;在250°C时,它们保留了原来的75.6%。这些柔性发光纤维有潜力用于高温环境下的荧光检测。综上所述,本研究采用简单的方法制备出光学性能和稳定性良好的无铅钙钛矿,拓展了钙钛矿在光纤领域的应用。
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来源期刊
Journal of Materials Chemistry C
Journal of Materials Chemistry C MATERIALS SCIENCE, MULTIDISCIPLINARY-PHYSICS, APPLIED
CiteScore
10.80
自引率
6.20%
发文量
1468
期刊介绍: The Journal of Materials Chemistry is divided into three distinct sections, A, B, and C, each catering to specific applications of the materials under study: Journal of Materials Chemistry A focuses primarily on materials intended for applications in energy and sustainability. Journal of Materials Chemistry B specializes in materials designed for applications in biology and medicine. Journal of Materials Chemistry C is dedicated to materials suitable for applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry C are listed below. This list is neither exhaustive nor exclusive. Bioelectronics Conductors Detectors Dielectrics Displays Ferroelectrics Lasers LEDs Lighting Liquid crystals Memory Metamaterials Multiferroics Photonics Photovoltaics Semiconductors Sensors Single molecule conductors Spintronics Superconductors Thermoelectrics Topological insulators Transistors
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