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Research Article

Directional emissions from perovskite nanocrystals thin film enabled by metasurface integration through one step spin-coating process

Kexue Li1,§, Xuanyu Zhang2,§, Peinan Ni3,§, Juncheng Liu1, Fengyuan Lin1, Xu Man1, Wenfeng Cai2, Jianxun Liu2, Yanjun Liu2, Rui Chen2, Zhipeng Wei1()
State Key Laboratory of High Power Semiconductor Laser, School of physics, Changchun University of Science and Technology, Changchun 130022, China
Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Photonics Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, Göteborg, SE-41296, Sweden

§ Kexue Li, Xuanyu Zhang, and Peinan Ni contributed equally to this work.

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This work proposed and demonstrated an ultracompact solution for directional emissions from perovskite nanocrystal thin films, including collimated light emissions and two-dimensional beam steering, using integrated dielectric metasurface through one step spin-coating process.

Abstract

Advances in thin film light-emitting devices have fueled the rapid growth of a new class of solid-state lighting devices, featuring low fabrication cost, high quantum efficiency, and broadband spectrum coverage, etc. In contrast to the conventional inorganic semiconductors that rely on lattice matched high crystalline quality substrate, solution processable thin films eliminate the dependence on the substrate, which is highly desired for the ease and versatility of integrations with foreign medium. By taking this advantage, this work developed an ultracompact solution to control the directionality of thin film emitters using integrated dielectric metasurface through one step spin-coating process. As a proof of concept, directional emissions from perovskite nanocrystal thin film, including collimated light emissions and two-dimensional beam steering, are experimentally demonstrated. Notably, our approach, where light emitters were integrated on the back side of substrate after the fabrication of metasurface, judiciously avoids any potential degradation of material optical quality caused by the multi-step nanofabrication. Therefore, it can serve as a generalized scheme to engage the advantageous properties of dielectric metasurface, including the compactness, high efficiency, and beam controllability with the emerging thin film light-emitting diodes (LEDs), which is applicable to a wide range of solution processable materials, including organic light-emitting diodes, quantum-dot light emitting diodes, polymer LEDs, and perovskite LEDs, opening up new pathways to develop low-cost and ultra-compact solid state light sources with versatile beams characteristics.

Keywords

solid state light sourceperovskite light-emitting diodes (LEDs)metasurface integrationson-chip beam shapingbeam steering

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Nano Research
Volume 16 Issue 5,
May 2023
Pages 7646-7653
DOI: 10.1007/s12274-023-5439-y
Cite this article:
Li K, Zhang X, Ni P, et al. Directional emissions from perovskite nanocrystals thin film enabled by metasurface integration through one step spin-coating process. Nano Research, 2023, 16(5): 7646-7653. https://doi.org/10.1007/s12274-023-5439-y
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