Light-Emitting Electrochemical Cells Based on Hybrid Lead Halide Perovskite Nanoparticles
Light-Emitting Electrochemical Cells Based on Hybrid Lead Halide Perovskite Nanoparticles
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DOI：
10.1021/acs.jpcc.5b02959
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发表时间：
2015-05-28
影响因子：
3.7
通讯作者：
Costa, Ruben D.
中科院分区：
文献类型：
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作者：
Aygueler, Meltem F.;Weber, Michael D.;Costa, Ruben D.
甲基溴化铅（MAPbBr(3)）钙钛矿纳米颗粒（NPs）最近被提出作为发光二极管的新材料，以及阐明钙钛矿太阳能电池工作机制的新范例。在这里，我们扩展了合成概念，以合成基于甲脒基溴化铅（FAPbBr(3)）的NPs。重要的是，我们已经证明，这种新材料的光物理特性可以通过交换有机阳离子来轻松调节，从而实现FAPbBr(3) NPs的低辐射双分子重组率。此外，我们首次报道了基于钙钛矿NPs的发光电化学电池（LECs），该电池采用易于扩展的喷涂技术。在低驱动电流下，这两种材料都实现了1-2 cd/m(2)的稳定亮度。总之，本研究为含不同烷基铵基的有机无机金属卤化物纳米粒子及其在薄膜照明器件领域的应用开辟了新的研究途径。
Methylammonium lead bromide (MAPbBr(3)) perovskite nanoparticles (NPs) have been recently proposed as a new material for light-emitting,diodes, as well as a new paradigm to elucidate the operational mechanism in perovskite solar cells. Here, we have expanded the synthesis concept to fabricate NPs based on formamidinium lead bromide (FAPbBr(3)). Importantly, we have demonstrated that the photophysical features of this novel material can be easily tuned by exchanging the organic cation, achieving lower radiative bimolecular recombination rate for FAPbBr(3) NPs. Additionally, we report for the first time light-emitting electrochemical cells (LECs) based on perovskite NPs by an easily up-scalable spray-coating technique. Stable luminance of 1-2 cd/m(2) at low driving currents was achieved for both types of materials. Overall, this work opens a new avenue of research into the field of organic inorganic metal halide nanoparticles bearing different alkyl ammonium groups and their application in the developing field of thin-film lighting devices.