近日，英国萨里大学的Wei Zhang及其研究小组取得一项新新进展。经过不懈努力，他们成功研制了硅基高带宽钙钛矿光子源。相关研究成果已于2023年7月20日在国际知名学术期刊《自然—光子学》上发表。

这项研究报道了一种在钙钛矿系统中基于定制烷基铵阳离子的硅上，实现快速钙钛矿光子源的整体方法。研究人员揭示了带电物质在不同载流子密度下与其调制性能相关的重组行为。通过在硅上集成Fabry-Pérot微腔，研究人员演示了具有高效光脱耦的钙钛矿器件。他们实现了高达42.6MHz的设备调制带宽和超过50 Mbps的数据速率，进一步分析表明带宽可能超过千兆赫兹量级。

该研究发展的原理将支持下一代数据通信架构中钙钛矿光源的开发，并为硅衬底上溶液处理钙钛矿发射器的集成提供了可能性。

据悉，金属卤化物钙钛矿由于其优异的光电性能和溶液可加工性，广泛应用于现代社会的发光二极管(LED)中，涵盖从照明和显示到医疗诊断和数据通信等各个领域。虽然在优化其外部量子效率方面取得了显著进展，但钙钛矿LEDs的调制特性目前仍存在尚未完全明确的问题。

附：英文原文

Title: High-bandwidth perovskite photonic sources on silicon

Author: Ren, Aobo, Wang, Hao, Dai, Linjie, Xia, Junfei, Bai, Xinyu, Butler-Caddle, Edward, Smith, Joel A., Lai, Huagui, Ye, Junzhi, Li, Xiang, Zhan, Shijie, Yao, Chunhui, Li, Zewei, Tang, Mingchu, Liu, Xueping, Bi, Jinxin, Li, Bowei, Kai, Shen, Chen, Rui, Yan, Han, Hong, Jintao, Yuan, Liming, Marko, Igor P., Wonfor, Adrian, Fu, Fan, Hindmarsh, Steven A., Sanchez, Ana M., Lloyd-Hughes, James, Sweeney, Stephen J., Rao, Akshay, Greenham, Neil C., Wu, Jiang, Li, Yanrong, Cheng, Qixiang, Friend, Richard H., Penty, Richard V., White, Ian H., Snaith, Henry J., Zhang, Wei

Issue&Volume: 2023-07-20

Abstract: Light-emitting diodes (LEDs) are ubiquitous in modern society, with applications spanning from lighting and displays to medical diagnostics and data communications. Metal-halide perovskites are promising materials for LEDs because of their excellent optoelectronic properties and solution processability. Although research has progressed substantially in optimizing their external quantum efficiency, the modulation characteristics of perovskite LEDs remain unclear. Here we report a holistic approach for realizing fast perovskite photonic sources on silicon based on tailoring alkylammonium cations in perovskite systems. We reveal the recombination behaviour of charged species at various carrier density regimes relevant for their modulation performance. By integrating a Fabry–Pérot microcavity on silicon, we demonstrate perovskite devices with efficient light outcoupling. We achieve device modulation bandwidths of up to 42.6MHz and data rates above 50Mbps, with further analysis suggesting that the bandwidth may exceed gigahertz levels. The principles developed here will support the development of perovskite light sources for next-generation data-communication architectures. The demonstration of solution-processed perovskite emitters on silicon substrates also opens up the possibility of integration with micro-electronics platforms.

DOI: 10.1038/s41566-023-01242-9

Source: https://www.nature.com/articles/s41566-023-01242-9