Lead halide perovskite quantum dots for light-emitting devices

Chiba, Takayuki; Kido, Junji

doi:10.1039/c8tc03561j

Cited by 54 publications

(36 citation statements)

References 81 publications

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“…2b) are highly desired and have been explored 13 . These useful strategies have significantly improved the optoelectronic properties and stability of PNCs, benefiting the resulting PeLEDs (ref 13,36 ).…”

Section: Towards Highly Emissive Metal Halide Perovskitesmentioning

confidence: 99%

“…Since the PNC-based PeLEDs reported in 2015 48 , intensive efforts have been dedicated to optimizing material compositions (for instance through A-site substitution and metal ion doping), purification protocols and surface ligands 13 . These efforts have led to controllable luminescent properties of PNCs and rapid performance improvement of the ensuing PNC-based PeLEDs 9,13,36 .…”

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Metal halide perovskites for light-emitting diodes

et al. 2020

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Metal halide perovskites have shown promising optoelectronic properties suitable for lightemitting applications. The development of perovskite light-emitting diodes (PeLEDs) has progressed rapidly over the past several years, reaching high external quantum efficiencies of over 20%. In this Review, we focus on the key requirements for high-performance PeLEDs, highlight recent advances on materials and devices, and emphasize the importance of reliable characterizations of PeLEDs. We discuss possible approaches to improve the performance of blue and red PeLEDs, increase the long-term operational stability, and reduce toxicity hazards.We also provide an overview of the application space made possible by recent developments of high-efficiency PeLEDs. 3Metal halide perovskites, which have led to great advances in photovoltaic devices, have also proved to be promising candidates for light-emitting diodes (LEDs) 1 . They have shown excellent optoelectronic properties suitable for LEDs, such as high photoluminescence quantum yields (PLQYs), widely tunable bandgap, narrow emission width, and high charge-carrier mobility 2 . Although early reports on perovskite LEDs (PeLEDs) date back to the 1990s 3,4 , room-temperature PeLEDs were not demonstrated until 2014 5 . Since then, benefiting from established experience in both perovskite materials and solution-processed optoelectronic devices, the community has quickly boosted the external quantum efficiencies (EQEs) of PeLEDs to each more than 20% (Box 1) (refs [6][7][8][9][10] ).The rapid development of PeLEDs could lead to a new generation of low-cost and highperformance LEDs for applications including displays, lighting and optical communications 2,11,12 . Compared with other emitters used in commercial devices, such as III-V inorganic semiconductors, organic emitters and conventional colloidal quantum dots (QDs), perovskites have several promising characteristics. Specifically, perovskite emitters with high PLQYs can be straightforwardly fabricated from low-cost precursor solutions, potentially reducing manufacturing costs. Synthesis of colloidal perovskite nanocrystals (PNCs) is also simplified, as PNCs can reach near-unity PLQYs without delicate shell passivation, owing to their unique defect-tolerance nature 13,14 . Furthermore, the optoelectronic properties of perovskite emitters can be readily tailored by engineering composition and dimensionality, enabling continuously tunable light emission from violet to near-infrared (NIR) regions 2,13 . In addition, light emission from perovskites shows narrow linewidths (<100 meV), resulting in high color purity: for example, the photoluminescence full width at half maximum (FWHM) is around 12, 20 and 40 nm for CsPbCl3, CsPbBr3 and CsPbI3 PNCs, respectively 15 . The color gamut of displays made by PNCs can cover up to 140% of the National Television System

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Section: Towards Highly Emissive Metal Halide Perovskitesmentioning

confidence: 99%

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confidence: 99%

Metal halide perovskites for light-emitting diodes

et al. 2020

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“…56,[249][250][251][252][253][254] The structure and properties of MHP NCs are largely dened by their interfaces with the surrounding solution (in colloidal phases) or matrix (in solid composites) because of their large surface-to-volume ratio. 126,[255][256][257][258] There has been tremendous interest in MHP NCs (oen called perovskite quantum dots, even for particles larger than the $5 nm limit for quantum connement) for lighting applications because of their near-unity photoluminescence quantum yield, narrow emission and tunable color gamut. 15,25,158,257,259,260 The unique combination of these optical properties and solution processability makes them suitable candidates for display technologies.…”

Section: Intrinsic Interfacesmentioning

confidence: 99%

Interfaces in metal halide perovskites probed by solid-state NMR spectroscopy

2021

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“…2 These excellent properties have attracted much attention, especially in applications for LEDs, 3,4 wide-color gamut displays, 1 photovoltaic devices, 5 lasers, 6,7 photodetectors, 8 photocatalysts, 9 and bioimaging; 10 therefore, CsPbX 3 QDs have been examined by many research groups. [11][12][13][14][15][16][17] Furthermore, other cesium lead halides, e.g., CsPb 2 Br 5 , 18 are also attractive in optoelectronic devices. In CsPbX 3 , green-emitting bromide QDs show a higher PL quantum yield (PLQY) and stability than the chloride and iodide QDs.…”

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confidence: 99%