Highly Stable and Efficient Mn2+ Doping Zero-Dimension Cs2ZnxPb1-xCl4 Alloyed Nanorods toward White Electroluminescent Light-Emitting Diodes.

Highly Stable and Efficient Mn2+ Doping Zero-Dimension Cs2ZnxPb1-xCl4 Alloyed Nanorods toward White Electroluminescent Light-Emitting Diodes.
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高度稳定和高效的 Mn2 掺杂零维 Cs2ZnxPb1-xCl4 合金纳米棒用于白色电致发光二极管。

DOI:
10.1021/acs.jpclett.2c00381
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发表时间:
2022-03
期刊:
The journal of physical chemistry letters
影响因子:
--
通讯作者:
Hongwei Song
Hongwei Song
中科院分区:
其他
文献类型:
--
作者:
Wenda Chen;He Shao;Xiufeng Wu;Lifang Li;Jinyang Zhu;Biao Dong;Lin Xu;Wen Xu;Donglei Zhou;Junhua Hu;Xue Bai;Hongwei Song

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零维(0D)晶体结构钙钛矿纳米材料由于其优越的长期稳定性而重新成为有前途的材料;然而,由于其导电性差,导致其电性能较差,严重制约了0D钙钛矿材料的光电应用。在此基础上,采用改进的热注入法合成了合金化0D晶体结构Cs2ZnxPb1-xCl4纳米棒(NRs),该纳米棒在408 nm处发出明亮的蓝紫色光,优化后的光致发光量子产率(PLQY)达到26%。与CsPbCl3纳米立方膜相比,Cs2Zn0.88Pb0.12Cl4纳米立方膜具有更优异的空气稳定性和更高的电导率。此外,我们将Mn2+离子掺杂到Cs2Zn0.88Pb0.12Cl4 NRs中,获得了40.3%的优化PLQY和r = 0.19的极化发射。基于Mn2+离子掺杂Cs2Zn0.88Pb0.12Cl4 NRs的发光二极管(led)的色度坐标(CIE)为(0.36,0.33),EQE为0.3%,最大亮度为98 cd m-2。这项工作为白光钙钛矿led的生产提供了丰富的思路。
Zero-dimensional (0D) crystal structure perovskite NCs have reemerged as promising materials owing to their superior long-term stability; however, their poor conductivity leads to the inferior electrical performances and critically restricts the optoelectronic application of 0D perovskite materials. Herien, the alloyed 0D crystal structure Cs2ZnxPb1-xCl4 nanorods (NRs) have been synthesized by the modified hot-injection method, which emits bright blue-violet light at 408 nm, and the optimized photoluminescence quantum yield (PLQY) reaches 26%. The Cs2Zn0.88Pb0.12Cl4 NRs display more excellent air stability and an order of magnitude higher conductivity than CsPbCl3 nanocube films. In addition, we dope Mn2+ ions into the Cs2Zn0.88Pb0.12Cl4 NRs, which accomplished the optimized PLQY of 40.3% and polarized emission with r = 0.19. The light-emitting diodes (LEDs) based on Mn2+ ion doped Cs2Zn0.88Pb0.12Cl4 NRs exhibit a chromaticity coordinate (CIE) of (0.36, 0.33), an EQE of 0.3%, and a maximum luminance of 98 cd m-2. This work has enriched ideas for the production of white light perovskite LEDs.
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