Printable assemblies of perovskite nanocubes on meter-scale panel

Abstract

Hierarchical assemblies of functional nanoparticles can have applications exceeding those of individual constituents. Arranging components in a certain order, even at the atomic scale, can result in emergent effects. We demonstrate that printed atomic ordering is achieved in multiscale hierarchical structures, including nanoparticles, superlattices, and macroarrays. The CsPbBr 3 perovskite nanocubes self-assemble into superlattices in ordered arrays controlled across 10 scales. These structures behave as single nanoparticles, with diffraction patterns similar to those of single crystals. The assemblies repeat as two-dimensional planar unit cells, forming crystalline superlattice arrays. The fluorescence intensity of these arrays is 5.2 times higher than those of random aggregate arrays. The multiscale coherent states can be printed on a meter-scale panel as a micropixel light-producing layer of primary-color photon emitters. These hierarchical assemblies can boost the performance of optoelectronic devices and enable the development of high-efficiency, directional quantum light sources.

Recent Advances in Functional Nanoparticle Assemblies

“…Due to its importance, recent works have put efforts into a deeper understanding of the assembly of inorganic nanocrystals in ordered assemblies by in situ tracking the assembly process. [84,112] Finally, it is worth mentioning that along with semiconducting, metallic, and magnetic building blocks, nowadays, there is an increased research interest toward the self-assembly of perovskites into ordered structures [113][114][115][116] due to their interest in optoelectronic devices.…”

“…Finally, it is worth mentioning that along with semiconducting, metallic, and magnetic building blocks, nowadays, there is an increased research interest toward the self‐assembly of perovskites into ordered structures [ 113–116 ] due to their interest in optoelectronic devices.…”

On-Substrate Fabrication of CsPbBr3 Single-Crystal Microstructures via Nanoparticle Self-Assembly-Assisted Low-Temperature Sintering

“…30,31 Onsubstrate all-inorganic perovskite single-crystal microstructures, as an important material form, are easy to integrate. 6,32 Compared with traditional amorphous, polycrystalline, or single-crystal perovskite materials, they exhibit more ordered and uniform crystal structures, thus eliminating the need for secondary transfer and the introduction of defects. This structural superiority contributes to enhanced carrier mobility and reduced grain boundary defects, thereby improving the performance of miniaturized and flexible devices.…”

Sub‐30 nm 2D Perovskites Patterns via Block Copolymer Guided Self‐Assembly for Color Conversion Optical Polarizer

“…[11,[25][26][27] However, nanofabrication technologies for thin 2D perovskite films have scaling limits of approximately a few hundred nanometers (Table S1, Supporting Information), mainly because of the difficulty in controlling the rapid crystallization of perovskites in extremely small dimensions. Bottom-up template-assisted methods, [28] such as block copolymer (BCP) self-assembly, have been suggested to overcome the above-mentioned scaling limit. [9,25,[29][30][31][32] Despite the successful demonstration of sub-100 nm domain sizes of perovskite patterns, difficulty in achieving long-range order limits the fabrication of nanopatterns over a large area.…”