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Highly Efficient and Ultra-Broadband Yellow Emission of Lead-Free Antimony Halide toward White Light-Emitting Diodes and Visible Light Communication
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2022-07-03 , DOI: 10.1002/lpor.202100600
Qionghua Mo 1 , Jiabing Yu 1 , Chen Chen 2 , Wensi Cai 1 , Shuangyi Zhao 1 , HaiYun Li 1 , Zhigang Zang 1
Affiliation  

Due to the broadband emission induced by self-trapped excitons (STEs), low-dimensional hybrid lead halides are regarded as an emerging class of highly efficient light emitters. However, the toxic lead element impedes their commercial application. Here, a new air-stable hybrid lead-free metal halide [Na(DMSO)2]3SbBr6 with a 0D structure constituted by [SbBr6] octahedral and [Na(DMSO)2]3 units is synthesized at room temperature, which exhibits a high photoluminescence quantum yield of 60% and an ultra-broadband yellow emission centered at 608 nm, with a full width at half-maximum of 160 nm. First-principles calculations and experimental studies unveil that the formation of STEs in this 0D structure contributes the broad emission. Then, warm white light-emitting diodes (WLEDs) are proposed by combining blue LED chips with yellow [Na(DMSO)2]3SbBr6, showing a color rendering index of 85, a correlated color temperature of 3603 K. Finally, the prepared WLEDs are utilized in visible light communication (VLC) with an achieved −3 dB bandwidth of 7.2 MHz and a high transmitted data rate of 81.6 Mbps by applying orthogonal frequency division multiplexing modulation with adaptive bit loading. This research not only enriches the family of perovskite related materials, but also inspires the potential of low-dimensional metal halide in VLC.

中文翻译:

无铅卤化锑对白光发光二极管和可见光通信的高效超宽带黄光发射

由于自陷激子(STE)引起的宽带发射,低维混合卤化铅被认为是一类新兴的高效发光体。然而,有毒的铅元素阻碍了它们的商业应用。在这里,一种新的空气稳定的混合无铅金属卤化物[Na(DMSO) 2 ] 3 SbBr 6具有由[SbBr 6 ]八面体和[Na(DMSO) 2 ] 3构成的0D结构。单位在室温下合成,具有 60% 的高光致发光量子产率和以 608 nm 为中心的超宽带黄色发射,半峰全宽为 160 nm。第一性原理计算和实验研究表明,这种 0D 结构中 STE 的形成有助于广泛的发射。然后,通过将蓝色 LED 芯片与黄色 [Na(DMSO) 2 ] 3 SbBr 6结合,提出了暖白光发光二极管 (WLED),显示显色指数为 85,相关色温为 3603 K。最后,制备的 WLED 用于可见光通信 (VLC),实现了 7.2 MHz 的 -3 dB 带宽和 81.6 Mbps 的高传输数据速率通过应用具有自适应位加载的正交频分复用调制。该研究不仅丰富了钙钛矿相关材料的家族,也激发了低维金属卤化物在VLC中的潜力。
更新日期:2022-07-03
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