Highly bright and stable single-crystal perovskite light-emitting diodes

Chen, Wenjing; Huang, Zongming; Yao, Haitao; Liu, Yan; Zhang, Yihan; Z, Li; Zhou, Hongmin; Xiao, Peng; Chen, Tao; Sun, Haiding; Huang, Jinsong; Xiao, Zhengguo

doi:10.1038/s41566-023-01167-3

Cited by 59 publications

(52 citation statements)

References 47 publications

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“…Three-dimensional (3D) organic–inorganic metal-halide perovskites are a research hotspot in the development of materials for displays, sensors, and photovoltaics. , In view of their simple fabrication, low cost, and tunable emission across the whole visible spectrum, these materials have driven the advancement of a new generation of solar cells and light-emitting diodes with impressive performance values. , Although some examples have been recently reported, , the poor structural stability of these 3D perovskites, along with the presence of Pb, , is still limiting their real-world applications.…”

Section: Synthesismentioning

confidence: 99%

Stable Sn-Based Hybrid Perovskite-Related Structures with Tunable Color Coordinates via Organic Cations in Low-Temperature Synthesis

et al. 2023

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Organic−inorganic Pb-free layered perovskites are efficient broadband emitters and thus are promising materials for lighting applications. However, their synthetic protocols require a controlled atmosphere, high temperature, and long preparation time. This hinders the potential tunability of their emission through organic cations, as is instead common practice in Pb-based structures. Here, we present a set of Sn−Br layered perovskiterelated structures that display different chromaticity coordinates and photoluminescence quantum yield (PLQY) up to 80%, depending on the choice of the organic monocation. We first develop a synthetic protocol that is performed under air and at 4 °C, requiring only a few steps. X-ray and 3D electron diffraction analyses show that the structures exhibit diverse octahedra connectivity (disconnected and face-sharing) and thus optical properties, while preserving the organic−inorganic layer intercalation. These results provide key insight into a previously underexplored strategy to tune the color coordinates of Pb-free layered perovskites through organic cations with complex molecular configurations.

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Section: Synthesismentioning

confidence: 99%

Stable Sn-Based Hybrid Perovskite-Related Structures with Tunable Color Coordinates via Organic Cations in Low-Temperature Synthesis

et al. 2023

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“…The optimal LED device achieved an ultrahigh luminance of 136 100 cd m −2 and a half-lifetime of 88.2 mins at an initial luminance of 1100 cd m −2 . Recently, Xiao et al employed a synergistic approach of perovskite component engineering and precursor additive engineering, which markedly enhanced the external photoluminescence quantum yield of perovskite single crystals to 28.3% [178]. Using perovskite crystals with a thickness of 1.5 µm as the active layer, they produced LED devices with an ultrahigh luminance of 86 000 cd m −2 and a peak EQE of 11.2%, and achieved a T 50 lifetime of 12 500 h at an initial luminance of 100 cd m −2 .…”

Section: Leds and Lasersmentioning

confidence: 99%

“…(c) Schematic of single crystal growth using a space-confined inverse-temperature crystallization method, and the LED performance of the corresponding device. Reproduced from [178], with permission from Springer Nature. (d) Lasing performance of the MAPbBr 3 microcrystalline array.…”

Section: Leds and Lasersmentioning

confidence: 99%

Perovskite single crystals: physical properties and optoelectronic applications

Li,

Sun,

Gan

et al. 2023

Mater. Futures

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Single crystal is the most advantageous of the crystalline states of halide perovskites. It displays better optical and electrical capabilities than polycrystalline films and microcrystals due to their inherent structural advantages, such as free grain boundaries, long-range ordered structure, and high orientation. Single-crystal perovskite materials can theoretically enable optoelectronic devices with higher performance and stronger stability. In this review, the intrinsic physical properties of perovskite single crystals are analyzed. The most recent advances in single-crystal optoelectronic devices are reviewed, and the design principles of the devices under different application conditions are revealed. It provides potential solutions for remaining challenges, and it is expected to accelerate the development of perovskite based optoelectronic devices.

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“…In recent years, metal halide perovskite materials have attracted enormous scientific and technological interest as active layers in light-emitting diodes (LEDs), solar cells, and photodetectors due to their excellent optical and electronic properties as well as low cost and solution processability. − Perovskite quantum dots (QDs) are considered promising candidates for realizing high-quality and high-definition displays due to their inherent narrow emission, tunable wavelength, and high photoluminescence quantum efficiency. Just in a few years, since perovskite QDs were first synthesized in 2014, the photoluminescence quantum yields (PLQYs) of perovskite QD solutions are close to unity, and the external quantum efficiency (EQE) and operation stability of quantum dot light-emitting diodes (QLEDs) are continuously improving. − …”

Section: Introductionmentioning

confidence: 99%

Improving Perovskite Green Quantum Dot Light-Emitting Diode Performance by Hole Interface Buffer Layers

Wang

Zhang

Qian

et al. 2023

ACS Appl. Mater. Interfaces

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Perovskite quantum dot light-emitting diodes (QLEDs) are potential candidates for next-generation displays due to their high color purity and wide color gamut. Due to the strong electron-accepting ability of poly[bis(4-phenyl) (2,4,6-trimethylphenyl) amine] (PTAA), quantum dot (QD) films are prone to be charged, which leads to the imbalance of charge injection and the increase of nonradiative recombination, ultimately affecting the performance of the QLEDs. Here, we compared and studied two polymers, poly(methyl methacrylate) (PMMA) and poly(vinyl pyrrolidone) (PVP), as the hole interface buffer layers of QD films, which effectively reduced the defect density, suppressed nonradiative recombination, and greatly improved the efficiency and stability of QLEDs. The devices with PMMA achieved a maximum external quantum efficiency of 20.71%.

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Highly bright and stable single-crystal perovskite light-emitting diodes

Cited by 59 publications

References 47 publications

Stable Sn-Based Hybrid Perovskite-Related Structures with Tunable Color Coordinates via Organic Cations in Low-Temperature Synthesis

Stable Sn-Based Hybrid Perovskite-Related Structures with Tunable Color Coordinates via Organic Cations in Low-Temperature Synthesis

Perovskite single crystals: physical properties and optoelectronic applications

Improving Perovskite Green Quantum Dot Light-Emitting Diode Performance by Hole Interface Buffer Layers

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