Electrohydrodynamically Printed High‐Resolution Full‐Color Hybrid Perovskites

Zhu, Menghua; Duan, Yongqing; Liu, Nian; Li, Hegeng; Li, Jinghui; Du, Peipei; Tan, Zhe; Niu, Guangda; Gao, Liang; Yin, Zhouping; Tang, Jiang

doi:10.1002/adfm.201903294

Cited by 118 publications

(110 citation statements)

References 39 publications

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“…As a digital patterning technology, inkjet printing gives rapid access to a wide range of geometries (Figure e) as required for rapid prototyping, personalized devices, or 3D architectures with integrated displays. Here, we successfully demonstrated the high‐resolution inkjet printing of green CdSe QDs devices, and we believe that the experimental strategy and printing technical route can be adapted for other appropriate CdSe QDs and even perovskite QDs …”

Section: Resultsmentioning

confidence: 96%

High‐Resolution Inkjet Printing of Quantum Dot Light‐Emitting Microdiode Arrays

Yang

Zhang

Kang

et al. 2019

Advanced Optical Materials

174

122

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The direct printing of microscale quantum dot light‐emitting diodes (QLEDs) is a cost‐effective alternative to the placement of pre‐formed LEDs. The quality of printed QLEDs currently is limited by nonuniformities in droplet formation, wetting, and drying during inkjet printing. Here, optimal ink formulation which can suppress nonuniformities at the pixel and array levels is demonstrated. A solvent mixture is used to tune the ejected droplet size, ensure wetting, and provoke Marangoni flows that prevent coffee stain rings. Arrays of green QLED devices are printed at a resolution of 500 pixels in.−1 with a maximum luminance of ≈3000 cd m−2 and a peak current efficiency of 2.8 cd A−1. The resulting array quality is sufficient to print displays at state‐of‐the‐art resolutions.

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Section: Resultsmentioning

confidence: 96%

High‐Resolution Inkjet Printing of Quantum Dot Light‐Emitting Microdiode Arrays

Yang

Zhang

Kang

et al. 2019

Advanced Optical Materials

174

122

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“…Recently, electrohydrodynamic (EHD) printing method is employed to improve the resolution of the printed perovskite QD patterns on the indium tin oxide (ITO) glass to the order of several micrometers (Figure 4d,e). [ 85–87 ] Different from inkjet printing, EHD printing is equipped with a high voltage potential between the nozzle tip and ITO glass substrate, changing the pendant drop into a cone‐like shape.…”

Section: Perovskite Patterning Technologiesmentioning

confidence: 99%

Metal Halide Perovskites Functionalized by Patterning Technologies

Huang

Xiao

Dong

2020

Adv Materials Technologies

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Date back to the first introduction of organic-inorganic hybrid perovskites into solar cells in 2009, [5] the power conversion efficiencies (PCEs) have been greatly boosted from 3.8% to 25.2% (certified PCEs) during the past decade. [6] With the merits of excellent photoluminescence (PL) quantum yield, perovskite-based light-emitting diodes (LEDs) have achieved external quantum efficiency (EQE) exceeding 20% via defect passivation, structural modification, and surface engineering. [7-9] In addition to the prosperity in photovoltaic and light-emitting devices, tremendous efforts are carried on the MHPs pursuing ultra-low threshold laser, [10,11] and ultra-sensitive photo-and X-ray detectors. [12-14] Solution processing method is commonly used for fabricating perovskite thin films. This cost-effective method allows large-scale production of smooth and uniform perovskite thin films served as the active layers of solar cells. [15] However, it is difficult to grow specific nano/microcrystals with desired dimensions and positions to meet the requirement of integrated electronic and optoelectronic devices with compactness. Patterning technology is widely used in optoelectronic fields to improve device performance. Performing various patterning technologies on materials not only obtain aesthetic value but also generate specific functions through constructing ordered and well-designed structures. [16-19] Specific structures and periodic patterns endow materials with unique light-matter interaction which has great impacts on photovoltaic and optoelectronic devices. [20] Moreover, patterning technologies can construct highresolution patterns down to nanoscale resolution, which meets the requirement for displaying and anti-counterfeiting applications. Therefore, performing versatile patterning technologies on MHPs would not only improve their electronic and optical properties but also opens a new pathway for integrated electronic and optoelectronic systems with unique and novel functions. Here, an overview of the recent advances of patterning technology in the field of MHPs is presented (Figure 1). The patterning technologies were divided into two parts based on whether patterned templates are required. With the merits of patterning technologies, the patterned MHPs exhibited novel functions and enhanced performance in optical and optoelectronic applications, such as solar cells, photodetectors, laser, anti-counterfeiting, and full-color displays. Therefore, the relationship between the patterned structures and the MHPs device performance as well as the corresponding mechanisms are discussed in detail. Finally, a summary and some perspectives on the existing challenges of patterned MHPs are put forward. Metal halide perovskites (MHPs), as emerging stars, are greatly attracted due to their superior optical and optoelectrical properties. The design and construction of patterned materials have been considered as a powerful tool to improve the performance of optical and optoelectronic devices. Therefore, the marriage of MHPs and ...

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“…The main advantage of direct patterning is that it allows for high-spatial resolution. A typical method for direct patterning is ink-jet printing 14,15 , which creates spatially controlled polycrystalline [16][17][18] or single crystal perovskite arrays 14,19 with careful optimization of precursor amounts. Another direct patterning approach consists of employing a focused ion beam (FIB) 20 or laser beam 21 to etch and transform perovskite thin films into intended patterns 20,22 .…”

Section: Introductionmentioning

confidence: 99%

Two-Step Patterning of Scalable All-Inorganic Halide Perovskite Arrays

et al. 2020

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Halide perovskites have many important optoelectronic properties, including high emission efficiency, high absorption coefficients, color purity and tunable emission wavelength, which makes this material promising for optoelectronic applications. However, the inability to precisely control largescale patterned growth of halide perovskites limits their potential toward various device applications. Here, we report a patterning method for the growth of cesium lead halide perovskite single crystal array. Our approach is consisted of two steps: (1) cesium halide salt arrays patterning and (2) chemical vapor transport (CVT) process to convert salt arrays into single crystal perovskite arrays. Characterizations including energy-dispersive x-ray spectroscopy and photoluminescence have been employed to confirm the chemical compositions and the optical properties of the as-synthesized perovskite arrays. This patterning method enables the patterning of single crystal cesium lead halide perovskite arrays with tunable spacing (from 2 µm to 20 µm) and crystal size (from 200 nm to 1.2 µm) in high production yield (almost every pixel in the array is successfully grown with a converted perovskite crystals). Our large-scale patterning method renders a platform for study of fundamental properties and opportunities for novel perovskitebased optoelectronic applications.

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Electrohydrodynamically Printed High‐Resolution Full‐Color Hybrid Perovskites

Cited by 118 publications

References 39 publications

High‐Resolution Inkjet Printing of Quantum Dot Light‐Emitting Microdiode Arrays

High‐Resolution Inkjet Printing of Quantum Dot Light‐Emitting Microdiode Arrays

Metal Halide Perovskites Functionalized by Patterning Technologies

Two-Step Patterning of Scalable All-Inorganic Halide Perovskite Arrays

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