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

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Nano Research 2023年第5期16卷 7646-7653页

作者： Kexue Li Xuanyu Zhang Peinan Ni Juncheng Liu Fengyuan Lin Xu Man Wenfeng Cai Jianxun Liu Yanjun Liu Rui Chen Zhipeng Wei state Key Laboratory of High Power Semiconductor Laser School of physicsChangchun University of Science and TechnologyChangchun 130022China Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen 518055China Photonics Laboratory Department of Microtechnology and NanoscienceChalmers University of TechnologyGöteborgSE-41296Sweden

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,broadband spectrum coverage,*** 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 *** 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 *** a proof of concept,directional emissions from perovskite nanocrystal thin film,including collimated light emissions and two-dimensional beam steering,are experimentally ***,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 ***,it can serve as a generalized scheme to engage the advantageous properties of dielectric metasurface,including the compactness,high efficiency,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.

关键词： solid state light source perovskite light-emitting diodes(LEDs) metasurface integrations on-chip beam shaping beam steering

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