Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.665
Publication date: 16th December 2024
Metal halide perovskites possess unique optical and electronic properties, including high light absorption, high mobility, tuneable bandgaps and high defect tolerance, and these properties make them very promising for achieving high performance optoelectronic devices. Here we demonstrate several examples of using perovskites as emitters for applications in multifunctional displays, visible light communications (VLCs) and quantum random number generators.
Firstly, we develop multifunctional displays using highly photo-responsive metal halide perovskite LEDs (PeLEDs) as pixels. With efficient defects passivation of perovskite layers, the red emissive PeLEDs shows an external quantum efficiency (EQE) of around 10% when working at LED model and a power conversion efficiency (PCE) of 5.34% at photovoltaic model. Due to the strong photo response of the PeLED pixels, the display can be simultaneously used as touch screen, fingerprint sensor, ambient light sensor, and image sensor without integrating any additional sensors. In addition, decent light-to-electricity conversion efficiency of the pixels also enables the display to act as a photovoltaic device which can charge the equipment.[1] The multiple-functions of our PeLED pixels can not only simplify the display module structure and realize ultra-thin and light-weight display, but also significantly enhance the user experience by these advanced new applications, and this is a feature hardly possible for conventional LED technologies.[2]
Additionally, we further demonstrate an all perovskite based visible light communication (VLCs) system with PeLEDs and PePVs, and quantum number random generator based on PeLEDs.[3] These demonstrations show that perovskite based optoelectronics will have special advantages in the future for high performance and low-cost telecommunication devices.
[1] C. Bao, Z. Yuan, W. Niu, J. Yang, Z. Wang, T. Yu, J. Wang, F. Gao, Nature Electronics 2024.
[2] N. Oh, B. H. Kim, S.-Y. Cho, S. Nam, S. P. Rogers, Y. Jiang, J. C. Flanagan, Y. Zhai, J.-H. Kim, J. Lee, Y. Yu, Y. K. Cho, G. Hur, J. Zhang, P. Trefonas, J. A. Rogers, M. Shim, Science 2017, 355, 616.
[3] J. Argillander, A. Alarcón, C. Bao, C. Kuang, G. Lima, F. Gao, G. B. Xavier, Communications Physics 2023, 6, 157.
Z. Yuan. acknowledges the support from the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 861985 (PEROCUBE) and the innovation programme under Marie Skłodowska-Curie grant (agreement no. 101105627) that funded by the Engineering and Physical Sciences Research Council (UK) (grant no. EP/Y029135/1).
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