Effect of ZnO on the crystallization and photoluminescence of CsPbI<sub>3</sub> perovskite quantum dots in borosilicate glasses

Xu, Zhousu; Chen, Tao; Xia, Jiazhi; Man, Tao; Zheng, Guojun; Yan, Jun; Liu, Xiaofeng; Zhang, Hang; Qiu, Jianrong

doi:10.1111/jace.18335

Cited by 9 publications

(3 citation statements)

References 38 publications

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“…As illustrated in Figure 1a, for the borosilicate glass, [BO 4 ] − tetrahedra will partially replace [SiO 4 ] ones in the silicate network, and charge imbalance is compensated by network modifying Zn 2+ ions. [40,41] High-content B 2 O 3 will lead to increase of [BO 3 ] triangular unit, which is conducive to the formation of a 2D glass network, and the introduced CaF 2 can release F − ions, which can break inherent bridging oxygen bond (SiO) and form lots of non-bridging oxygen. [42,43] Consequently, the present glass network can provide sufficient passages and spaces for Cs + , Pb 2+ , and Br − diffusion and promote nucleation/growth of CsPbX 3 .…”

Section: Resultsmentioning

confidence: 99%

Efficient and Stable Perovskite White Light‐Emitting Diodes for Backlit Display

Chen

Lin

Shi

et al. 2023

Adv Funct Materials

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High-quality backlit display puts forward urgent demand for colorconverting materials. Recently, metal halide perovskites (MHPs) with full spectral tunability, high photoluminescence quantum yields (PLQYs), and high color purity have found potential application in wide-color-gamut display. Regrettably, naked MHPs suffer from long-term instable issue and cannot pass harsh stability tests. Herein, amorphous-glass-protected green/ red CsPbX 3 quantum dots (QDs) are prepared by elaborately optimizing glass structure, perovskite concentration, and in situ crystallization. PLQYs of green CsPbBr 3 @glass and red CsPbBr 1.5 I 1.5 @glass reach 94% and 78%, respectively, which are the highest ones of CsPbX 3 @glass composites reported so far and comparable to colloidal counterparts. Benefited from complete isolation of QDs from external environment by glass network, CsPbX 3 @glass can endure harsh commercial standard aging tests of 85 °C/85%RH and blue-light-irradiation, which are applied to construct white light-emitting diodes (wLEDs) with high external quantum efficiency of 13.8% and ultra-high luminance of 500 000 cd m −2 . Accordingly, the perovskite wLED arrays-based backlit unit and a prototype display device are designed for the first time, showing more vivid and wide-color-gamut feature benefited from narrowband emissions of CsPbX 3 QDs. This work highlights practical application of CsPbX 3 @glass composite as an efficient and stable light color converter in backlit display.

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Section: Resultsmentioning

confidence: 99%

Efficient and Stable Perovskite White Light‐Emitting Diodes for Backlit Display

Chen

Lin

Shi

et al. 2023

Adv Funct Materials

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“…The other way to improve the stability of perovskite quantum dots (PQDs) was composite glass with PQDs embedded in the glass matrix, however, the photoluminescence quantum yield (PLQY) was relatively low (below 15%) because of interface defects or structural imperfections of PQDs induced by high temperature during fabrication processes. [ 13,14 ] So, an optimized synthesis route needs to be explored. As previously reported, synthesizing monodispersed CH 3 NH 3 PbBr x I 3 − x perovskite nanocrystals inside mesoporous silica (meso‐SiO 2 ) templates improved the stability, [ 15 ] and besides, template‐synthesized CsPbBr 3 NCs using meso‐SiO 2 matrices showed a moderate PLQY of about 48%.…”

Section: Introductionmentioning

confidence: 99%

Ligand‐Free CsPbBr₃ Perovskite Quantum Dots in Silica‐Aerogel Composites with Enhanced Stability for w‐LED and Display by Substituting Pb²⁺ with Pr³⁺ or Gd³⁺ Ions

Zhao

et al. 2022

Advanced Optical Materials

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Colloidal all‐inorganic lead halide perovskite nanocrystals (LHP NCs) feature with tunable high‐efficiency photoluminescence from blue to red for optoelectronic applications but suffer from instability under water moisture, UV light illumination, high‐temperature shock, as well as oxygen erosion. Previous work to improve LHP NCs stability was mainly focused on either glass bulk sealed LHP quantum dots (QDs) with low quantum efficiency, or mesoporous silica matrixes confined LHP QDs with organic ligands still existing. Here, a facile, noncolloidal, ligand‐free LHP QDs growth with physical confinement is proposed by integrating the growth of perovskite QDs with the fabrication process of hydrophobic silica‐aerogel powders (SAPs). As a result, the as‐synthesized mono‐ and mixed‐cesium‐lead‐halide QDs @ SAPs composites show tunable photoluminescence from purple to deep red. Besides, the Pr3+ ions doped CsPbBr3 QDs @ SAPs composites exhibit moderate quantum efficiency, excellent stability under UV illumination, water moisture as well as temperature variation. Furthermore, performances of white LED device encapsulated Pr3+ doped composite with blue GaN chip and commercial red (Sr, Ca)AlSiN3:Eu2+ phosphor are evaluated. This work demonstrates a facile and general strategy for synthesizing high‐stable all‐inorganic cesium‐lead‐halide QDs for applications in white LED and display devices.

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“…[ 21–23 ] The inorganic glass networks could act as a robust host to protect perovskite QDs from the environment effectively and restrain the aggregation and color segregation of perovskite QDs. [ 24 ] The state‐of‐the‐art perovskite glasses are restricted to dense glass medium. Although many approaches (e.g., melt quenching, laser writing, and liquid‐phase sintering) have been developed to manipulate the perovskite QDs growth, the high degree of control in terms of size, composition, and performance is still hampered by the inherent factors of the dense glass matrix.…”

Section: Introductionmentioning

confidence: 99%

Nano‐Confined Growth of Perovskite Quantum Dots in Transparent Nanoporous Glass for Luminescent Chemical Sensing

Jiang

Fengxian

et al. 2022

Advanced Optical Materials

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synthesis has emerged as the strategy for generating high-quality nanosized particles. [1,2] The resulting composite materials, in particular those inorganic nanoparticles embedded in the nanoporous matrix, often exhibit unanticipated optical, thermoelectric, magnetic, catalytic, and other properties. [1][2][3][4][5] The chemistry inside a nano-confined space would impose the physical constraints and chemical effect to increase reaction rates, limit growth size and stabilize reactive species. [5] Controlling the size and shape of semiconductor nanocrystals will enable tuning the bandgap of semiconductors via the quantum size effect, thus launching an effective route to precisely control the emission wavelength of nanocrystals. In addition, the nano-sized cage would also isolate and stabilize the formed nanocrystals. [6] Metal halide perovskite quantum dots (QDs) recently have attracted considerable attention due to their outstanding optical and electric properties, which make them promising candidates as building blocks of optoelectronic devices, including light-emitting diodes (LEDs), [7] photovoltaics, [8,9] lasers, [10,11] and photodetectors. [12] Recent intriguing concepts have elegantly used nano porous matrices to integrate with perovskite materials including nanocrystals and films. Such systems exhibit efficient manufacturing processes with much-improved material stability [13,14] and high photoluminescence quantum yield (PLQY) above 50%. [15][16][17] One facile strategy to create such systems is in situ nano-confined growth of metal perovskite QDs in a nanoporous template. However, prior studies have focused on using powders or thin films, [16][17][18][19] the low-dimensional morphologies of which usually suffer from inherent problems such as poor handling properties, high transparency limitations, and mechanical instability towards optical applications. For the integration of perovskite QDs composites into optoelectronic devices, a complex and time-consuming multi-step package procedure is required. [18,20] Thus, optically transparent, robust, and monolithic nanoporous templates are therefore highly sought after.The concept of optics and glasses go hand in hand. Recently inorganic glasses have drawn increasing attention as perovskite QDs matrix owing to their superior optical quality and thermal resistance. [21][22][23] The inorganic glass networks could act as a Prior nano-confined matrices for perovskite quantum dots (QDs) dealt only with powders or thin films, which usually suffer from poor handling properties and high transparency limitations for integrating into optical devices. Here, the nano-confined growth of perovskite QDs in an optically transparent, robust, and monolithic matrix by using nanoporous glass (NG) as a nano-reactor is demonstrated. Owing to quantum confinement effects in the inherent nanoporous network, rapid nanoconfined low-temperature solutionprocessed perovskite QDs could synthesize spontaneously. The binding energy of CsPbBr 3 QDs in NG has been enhanced to ≈177.2 meV due to t...

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Effect of ZnO on the crystallization and photoluminescence of CsPbI₃ perovskite quantum dots in borosilicate glasses

Cited by 9 publications

References 38 publications

Efficient and Stable Perovskite White Light‐Emitting Diodes for Backlit Display

Efficient and Stable Perovskite White Light‐Emitting Diodes for Backlit Display

Ligand‐Free CsPbBr₃ Perovskite Quantum Dots in Silica‐Aerogel Composites with Enhanced Stability for w‐LED and Display by Substituting Pb²⁺ with Pr³⁺ or Gd³⁺ Ions

Nano‐Confined Growth of Perovskite Quantum Dots in Transparent Nanoporous Glass for Luminescent Chemical Sensing

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Effect of ZnO on the crystallization and photoluminescence of CsPbI3 perovskite quantum dots in borosilicate glasses

Cited by 9 publications

References 38 publications

Efficient and Stable Perovskite White Light‐Emitting Diodes for Backlit Display

Efficient and Stable Perovskite White Light‐Emitting Diodes for Backlit Display

Ligand‐Free CsPbBr3 Perovskite Quantum Dots in Silica‐Aerogel Composites with Enhanced Stability for w‐LED and Display by Substituting Pb2+ with Pr3+ or Gd3+ Ions

Nano‐Confined Growth of Perovskite Quantum Dots in Transparent Nanoporous Glass for Luminescent Chemical Sensing

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Product

Resources

About

Effect of ZnO on the crystallization and photoluminescence of CsPbI₃ perovskite quantum dots in borosilicate glasses

Ligand‐Free CsPbBr₃ Perovskite Quantum Dots in Silica‐Aerogel Composites with Enhanced Stability for w‐LED and Display by Substituting Pb²⁺ with Pr³⁺ or Gd³⁺ Ions