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Highly Photoluminescent CsPbBr3/CsPb2Br5 NCs@TEOS Nanocomposite in Light-Emitting Diodes
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2021-02-11 , DOI: 10.1021/acs.inorgchem.0c03573
Yufeng Zhou 1 , Yanxia Yu 1 , Yaqian Zhang 1 , Xiaodong Liu 1 , Haisheng Yang 1 , Xiaojuan Liang 1 , Wei Xia 1 , Weidong Xiang 1
Affiliation  

All-inorganic halide perovskite (CsPb2Br5) nanocrystals (NCs) have received widespread attention owing to their unique photoelectric properties. This work reports a novel strategy to control the phase transition from CsPbBr3 to CsPb2Br5 and investigates the effects of different treatment times and treatment temperatures on perovskite NCs formation. By controlling the volume of tetraethoxysilane (TEOS) added, the formation of different phases of perovskite powder can be well controlled. In addition, a white light-emitting diode (WLED) device is designed by coupling the CsPbBr3/CsPbBr3–CsPb2Br5 NCs@TEOS nanocomposite and CaAlSiN3:Eu2+ commercial phosphor with a 460 nm InGaN blue chip, exhibiting a high luminous efficiency of 57.65 lm/W, color rendering index (CRI) of 91, and a low CCT of 5334 K. The CIE chromaticity coordinates are (0.3363, 0.3419). This work provides a new strategy for the synthesis of CsPbBr3/CsPbBr3–CsPb2Br5 NCs@TEOS nanocomposite, which can be applied to the field of WLEDs and display devices.

中文翻译:

发光二极管中的高光致发光CsPbBr 3 / CsPb 2 Br 5 NCs @ TEOS纳米复合材料

全无机卤化物钙钛矿(CsPb 2 Br 5)纳米晶体(NCs)由于其独特的光电性能而受到广泛关注。这项工作报告了一种控制从CsPbBr 3到CsPb 2 Br 5的相变的新策略,并研究了不同处理时间和处理温度对钙钛矿NCs形成的影响。通过控制四乙氧基硅烷(TEOS)的添加量,可以很好地控制钙钛矿粉末不同相的形成。另外,通过耦合CsPbBr 3 / CsPbBr 3 –CsPb 2 Br 5设计了白色发光二极管(WLED)器件。具有460 nm InGaN蓝芯片的NCs @ TEOS纳米复合材料和CaAlSiN 3:Eu 2+商业荧光粉,具有57.65 lm / W的高发光效率,91的显色指数(CRI)和5334 K的低CCT。 CIE色度坐标为(0.3363,0.3419)。这项工作为合成CsPbBr 3 / CsPbBr 3 –CsPb 2 Br 5 NCs @ TEOS纳米复合材料提供了新的策略,可应用于WLED和显示设备领域。
更新日期:2021-03-15
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