| CsPbX3(X=Br, I)@ZIF-8 复合材料用于高效WLED 器件 |
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| 引用本文：纪宇昂,杜超男,施惟恒,林东海.CsPbX3(X=Br, I)@ZIF-8 复合材料用于高效WLED 器件[J].上海第二工业大学(中文版),2024,41(3):240-246 |
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| 基金项目:上海市高等学校特聘教授(东方学者), 上海市科委扬帆计划(17YF1406600), 上海市教委晨光计划(18CG68), 上海市材料科学与工程高原学科资助 |
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| 中文摘要:纯无机铯铅卤钙钛矿材料由于其高光致发光量子产率(PLQY)、高色纯度、可调带隙、高载流子迁移率在光电子器件中引起了广泛的关注。然而, 水、氧条件下稳定性较差使其实际用途受到限制, 为了提升水氧环境下的稳定性, 在典型热注射法合成步骤中加入干燥的纳米粒子自组装方法合成的ZIF-8 粉末使钙钛矿纳米晶体在ZIF-8 孔隙中原位生长得到CsPbX3@ZIF-8(X=Br, I) 复合材料, 该合成方法步骤简单, 成本低廉, 合成样品具有优异的稳定性, 在空气中可以稳定2 年以上, 水中15 d 后依然观察到明亮的荧光发射。以PMMA 为基体材料制备的CsPbX3@ZIF-8/PMMA(X=Br, I) 复合膜具有良好的光学特性, 分别制成绿光CsPbBr3@ZIF-8/PMMA 膜发射峰波长为525 nm 与红光CsPbI3@ZIF-8/PMMA 膜发射峰波长为697 nm。以蓝光LED 为光源制备成的WLED 器件达到白光色度坐标为(0.311 2, 0.333 4), 色温6 552 K, 显色指数(CRI) 为73.6。 |
| 中文关键词:纯无机铯铅卤钙钛矿 ZIF-8 热注射法 稳定性 原位生长 WLED |
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| CsPbX3(X=Br, I)@ZIF-8 Composites for High-Efficiency WLED Devices |
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| Abstract:Pure inorganic cesium-lead-halide perovskite materials have attracted much attention in optoelectronic devices due to their high photoluminescence quantum yield (PLQY), high color purity, tunable bandgap, and high carrier mobility. However, the poor stability under conditions with water and oxygen limits its practical use. In order to enhance the stability under the environments containing
water and oxygen, ZIF-8 powder synthesized by the dry nanoparticle self-assembly method was incorporated in the typical thermal injection method to synthesize the perovskite nanocrystals in-situ in the ZIF-8 pores to obtain CsPbX3@ZIF-8(X=Br, I) composite powders. The method is simple to carry out and the cost is low. The synthesized composite powders can be stabilized in air for more
than 2 years, and the bright fluorescence emission is still observed after 15 days in water. The CsPbX3@ZIF-8/PMMA(X=Br, I) films prepared with PMMA as a matrix have good optical properties, with green CsPbBr3@ZIF-8/PMMA film emitting photoluminescence peak wavelength of 525 nm, and red CsPbI3@ZIF-8/PMMA film emitting photoluminescence peak wavelength of 697 nm, respectively.Together with a blue LED as a light source, the prepared WLED device has a white light chromaticity coordinates of (0.311 2, 0.333 4), a color temperature of 6 552 K, and a color rendering index (CRI) of 73.6. |
| keywords:pure inorganic cesium lead halide perovskite ZIF-8 hot injection stability in situ growth WLED |
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