Highly efficient emission and high-CRI warm white light-emitting diodes from ligand-modified CsPbBr&lt;sub&gt;3&lt;/sub&gt; quantum dots

Yan, Dongdong; Zhao, Shuangyi; Zhang, Yubo; Wang, Huaxin; Zang, Zhigang

doi:10.29026/oea.2021.200075

Cited by 13 publications

(7 citation statements)

References 81 publications

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“…Due to the excellent defect tolerance, high photoluminescence quantum yield (PLQY), high absorption coefficients and tunable band gap, metal halide perovskites have been widely demonstrated to be outstanding light‐emitting materials for light‐emitting diodes (LEDs) 1–5 . However, for classic lead halide perovskites, their toxicity of lead elements have been reported to impede their development in commercialization 6–10 .…”

Section: Introductionmentioning

confidence: 99%

Pressure‐assisted cooling to grow ultra‐stable Cs₃Cu₂l₅ and CsCu₂l₃ single crystals for solid‐state lighting and visible light communication

Wang

Chen

Yang

et al. 2022

EcoMat

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Owing to the excellent optical properties, white light‐emitting diodes (WLEDs) based on metal halide perovskites have attracted great attention as promising light source for solid‐state lighting and wireless visible light communication (VLC). However, the instability and toxicity of classic hybrid lead halides hinder their practical applications. Here, a pressure‐assisted cooling method is developed to grow lead‐free Cs3Cu2I5 and CsCu2I3 single crystals, which exhibit more excellent stability, larger size and uniform orientations in comparison with pressure‐free cooling method. Then, both single crystals are used as the emitters of WLEDs without encapsulation, exhibiting a high Color Rendering Index of 91, a decent Commission Internationale de l'Eclairage coordinate of (0.33, 0.33), a proper Correlated Color Temperature of 5436 K, as well as an excellent 1350‐h operating stability at atmosphere. Furthermore, the prepared WLEDs are utilized in wireless VLC, which possesses a −3 dB bandwidth of 10.1 MHz.

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Section: Introductionmentioning

confidence: 99%

Pressure‐assisted cooling to grow ultra‐stable Cs₃Cu₂l₅ and CsCu₂l₃ single crystals for solid‐state lighting and visible light communication

Wang

Chen

Yang

et al. 2022

EcoMat

Self Cite

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“…Perovskite quantum dots (PQDs) have attracted considerable attention owing to their narrow emission spectrum, high fluorescence quantum yield, tunable wavelength, narrow half‐peak width, and low price. [ 1–5 ] These properties result in excellent device performance in many fields, such as light‐emitting diodes, [ 6–11 ] solar cells, [ 12–16 ] laser detector, [ 17–21 ] photoelectric detector, [ 22–23 ] and optoacoustic conversion. [ 24 ] In 1892, inorganic CsPbX 3 metal halide perovskite was synthesized by Wells for the first time.…”

Section: Introductionmentioning

confidence: 99%

In Situ Synthesis of Monodispersed CsPbBr₃/P_GMA‐EDMA Microspheres with High Stability for White Light‐Emitting Diodes

Xia

Wang

et al. 2022

Part & Part Syst Charact

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Recently, perovskite quantum dots (PQDs) have attracted significant attention owing to their excellent optoelectronic properties in efficient white light‐emitting diodes (WLEDs). However, their poor stability for UV irradiation and high temperature hinders their practical applications. In this study, CsPbBr3 inorganic perovskite quantum dots (CPB QDs) are in situ grown into the channels of PGMA‐EDMA microspheres to improve their UV irradiation and thermal stability. Moreover, It is found that the pore structure of the PGMA‐EDMA microspheres can effectively block the aggregation between the CPB QDs, which effectively reduces the anion exchange and self‐absorption of fluorescence. Finally, A WLED is fabricated with the CPB/PGMA‐EDMA microspheres and the red‐emitting BaGe4O9:Eu3+ phosphor as color converters; The Commission Internationale de I'Eclairage color coordinates of the fabricated WLED is (0.33, 0.34), which is close to the standard white emission coordinate (0.33, 0.33). The luminous efficiency of as‐prepared WLED is 34.9 lm W−1 with a color render index (CRI) of 74.6, demonstrating that the CPB/PGMA‐EDMA microspheres are potential for application in lighting and display technologies.

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“…They have attracted much attention due to their high power conversion efficiency [5][6][7], tunable emission wavelength [8][9][10], high photoluminescence (PL) quantum efficiency [9] and excellent optoelectronic properties [8,[11][12][13]. Because of the superior optical properties of CsPbX 3 (X=Cl, Br, I), it has potential application in the area of Light Emitting Diode (LED), photodetectors, laser, dye solar cells etc [14][15][16][17]. The most recent generation of solar cells are mainly consists of polymer based dye-sensitised solar cells (DSSCs) [18][19][20][21], organic-inorganic halide perovskite solar cells (PSCs) [22], organic polymer PSCs [23], photoelectrochromic devices [24].…”

Section: Introductionmentioning

confidence: 99%

Interface properties of CsPbBr$_3$ /CsPbI$_3$ perovskite heterostructure for solar cell

Kumar,

Hembram

2022

Preprint

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2.0 We explore the interface properties of perovskite heterostructure CsPbBr 3 /CsPbI 3 through first-principles calculations. The structural interface is formed by the bonding of Cs-Br and Cs-I with bond length of ∼4.106 and 3.922 Å. The upshift of Goldsmith tolerance factor in the range 0.8 < < 1 from < 0.8 is revealed for the bi-layer interface, from bulk, reflecting the structural rearrangement from anisotropy to isotropy in confinement. The band gap arises mainly due to the energy difference of I-5p orbital than that of Br-4p at the valence band and Pb-6p at the conduction band. Heavier halide shows the red shift in the absorption spectra, for the pristine monolayer component. For the bilayer geometry, iodine contribution is more observed than that of bromine and the underlying interface properties may be useful for solar cell devices application.

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Highly efficient emission and high-CRI warm white light-emitting diodes from ligand-modified CsPbBr<sub>3</sub> quantum dots

Cited by 13 publications

References 81 publications

Pressure‐assisted cooling to grow ultra‐stable Cs₃Cu₂l₅ and CsCu₂l₃ single crystals for solid‐state lighting and visible light communication

Pressure‐assisted cooling to grow ultra‐stable Cs₃Cu₂l₅ and CsCu₂l₃ single crystals for solid‐state lighting and visible light communication

In Situ Synthesis of Monodispersed CsPbBr₃/P_GMA‐EDMA Microspheres with High Stability for White Light‐Emitting Diodes

Interface properties of CsPbBr$_3$ /CsPbI$_3$ perovskite heterostructure for solar cell

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Highly efficient emission and high-CRI warm white light-emitting diodes from ligand-modified CsPbBr<sub>3</sub> quantum dots

Cited by 13 publications

References 81 publications

Pressure‐assisted cooling to grow ultra‐stable Cs3Cu2l5 and CsCu2l3 single crystals for solid‐state lighting and visible light communication

Pressure‐assisted cooling to grow ultra‐stable Cs3Cu2l5 and CsCu2l3 single crystals for solid‐state lighting and visible light communication

In Situ Synthesis of Monodispersed CsPbBr3/PGMA‐EDMA Microspheres with High Stability for White Light‐Emitting Diodes

Interface properties of CsPbBr$_3$ /CsPbI$_3$ perovskite heterostructure for solar cell

Contact Info

Product

Resources

About

Pressure‐assisted cooling to grow ultra‐stable Cs₃Cu₂l₅ and CsCu₂l₃ single crystals for solid‐state lighting and visible light communication

Pressure‐assisted cooling to grow ultra‐stable Cs₃Cu₂l₅ and CsCu₂l₃ single crystals for solid‐state lighting and visible light communication

In Situ Synthesis of Monodispersed CsPbBr₃/P_GMA‐EDMA Microspheres with High Stability for White Light‐Emitting Diodes