|
|||||
|
|
One-Step Polymeric Melt Encapsulation Method to Prepare CsPbBr3 Perovskite Quantum Dots/Polymethyl Methacrylate Composite with High Performance |
|
| Authors: | Zhiteng Wang Rui Fu Fei Li Huidong Xie Peiwen He Qi Sha Zuobin Tang Na Wang Haizheng Zhong |
| Affiliation: | 1. School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055 China MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices, School of Materials Science and Engineering, Beijing Institute of Technology, 5 Zhongguancun South Street, Haidian District, Beijing, 100081 China;2. MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices, School of Materials Science and Engineering, Beijing Institute of Technology, 5 Zhongguancun South Street, Haidian District, Beijing, 100081 China;3. MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices, School of Materials Science and Engineering, Beijing Institute of Technology, 5 Zhongguancun South Street, Haidian District, Beijing, 100081 China Zhijing Nanotech, 9 Zhongguancun South Street, Haidian District, Beijing, 100081 China;4. School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055 China;5. College of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an, Shaanxi, 710054 China |
| Abstract: | All-inorganic CsPbBr3 perovskite quantum dots (PQDs) exhibit excellent photoelectric properties and application prospects in the field of light-emitting diodes (LEDs) and display devices. However, these possess poor long-term stability to UV irradiation, water, heat, and oxygen. Using polymethyl methacrylate (PMMA) as the matrix along with CH3(CH2)16COOCs, [CH3(CH2)16COO]2Pb, and KBr as the perovskite sources, CsPbBr3 PQDs/PMMA composites are for the first time prepared via an in situ polymeric melt encapsulation method. Special attention is paid to the effects of synthesis conditions on the photoluminescent quantum yield (PLQY) of the composites. The optimized CsPbBr3 PQDs/PMMA composite reveals excellent performance with ≈82.7% PLQY and ≈18.6 nm full width at a half-maximum (FWHM). In particular, after 90 h of UV irradiation or 35 days of heating at 60 °C, the luminous intensity remains almost unchanged. In addition, after soaking in water for 15 days, it retains up to ≈53% of the initial luminous intensity, meaning that the composite possesses long-term stability to UV irradiation, heat, and water. The as-prepared white LED (WLED) based on the composite evidences the wide color gamut (126.5% National Television System Committee (NTSC)) and a luminous efficiency of 32 lm W−1. This work offers a novel, easily industrialized one-step, and solvent free route for low-temperature synthesis of all-inorganic PQDs with broad application prospects. |
| Keywords: | CsPbBr3 PQDs photoluminescent quantum yield polymeric melt encapsulation method polymethyl methacrylate stability |
