Pump-power-dependence of a CsPbBr3-in-Cs4PbBr6 quantum dot color converter

Leitao, Miguel F.; Islim, Mohamed Sufyan; Yin, Liang; Viola, Shaun; Watson, Scott; Kelly, Anthony E.; Dong, Yue; Li, X.; Zeng, Haibo; Videv, Stefan; Haas, Harald; Gu, Erdan; Watson, I. M.; Laurand, N.; Dawson, Martin D.

doi:10.1364/ome.9.003504

Cited by 8 publications

(6 citation statements)

References 38 publications

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“…[ 211 ] Unlike CsPbX 3 and Cs 4 PbX 6 , CsPb 2 X 5 was relatively stable against water, but still showed humidity sensitivity that could be detected by the capacitance, leading to it being a state‐of‐the‐art humidity sensor. [ 222 ] Not limited to the aforementioned optoelectronic fields and stimuli responses, low‐dimensional‐networked perovskites have been implemented in laser diodes, [ 223 ] solar concentrators, [ 224 ] color convertors, [ 225 ] lithium batteries [ 162 ] memory devices, [ 116,226 ] and in catalysis. [ 227 ] These successful applications demonstrate the very bright future that these perovskite materials hold.…”

Section: Applicationsmentioning

confidence: 99%

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

et al. 2020

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resistance against thermal-treatment compared to organic-inorganic hybrid lead halide perovskites (MAPbX 3 and FAPbX 3), due to the high thermal decomposition temperature of inorganic cations, thus drawing much attention. Owing to their impressive features, all-inorganic lead halide perovskites have been greatly useful in photovoltaic and optoelectronic applications, including solar cells, light-emitting diodes (LEDs), lasers, photodetectors and photocatalysis. [5-17] The conspicuous achievements in CsPbX 3 provoke the rapid development of its derivatives, Cs 4 PbX 6 and CsPb 2 X 5. These Cs x Pb y X z materials are composed of the same element compositions and [PbX 6 ] 4− unit cells. However, they possess completely different connectivity characters of [PbX 6 ] 4− octahedrons. CsPbX 3 is classified as a type of 3D perovskite, because [PbX 6 ] 4− octahedra are corner-shared along all three axes, while CsPb 2 X 5 has a sandwich-like arrangement with Cs + cations in between PbX 2 crystallographic planes, which can be regarded as a 2D phase. In Cs 4 PbX 6 , disconnected [PbBr 6 ] 4− octahedra are completely decoupled by Cs + cations. Among these three structures, CsPb 2 X 5 and Cs 4 PbX 6 , with dimensional-network less than 3 are referred to as lowdimensional-networked cesium lead halide perovskites. Besides the connectivity, these structures can be understood from a confinement perspective. CsPbX 3 is not confined in any dimension such that it can be considered as a 3D networked semiconductor. CsPb 2 X 5 and Cs 4 PbX 6 are confined in one dimension and all three dimensions, hence the name 2D and 0D structures, respectively. [18,19] In CsPb 2 X 5 and Cs 4 PbX 6 , the excitons cannot dissociate easily within all dimensions; instead, they are confined in the PbX 2 planes and individual [PbX 6 ] 4− units, respectively, resulting in larger bandgaps compared to the traditional ABX 3 phase. Figure 1 illustrates these three structures with different dimensions. Until now, comprehensive accounts of these Cs x Pb y X z materials have been made. However, most recent research focuses on CsPbX 3 , which has excellent optical properties and promising potential in various applications. Its derivatives, CsPb 2 X 5 and Cs 4 PbX 6 have achieved tremendous progress but are still far behind that of CsPbX 3. Many problems still seriously limit the rapid development of these low-dimensional-networked perovskites, a typical one being the debate on the origin of their luminescence. In this Review article, we focus on Cs 4 PbX 6 and CsPb 2 X 5 , and attempt to unveil their features, potential in All-inorganic cesium lead halide perovskites have emerged as promising optoelectronic materials with excellent photophysical properties and great potential in a variety of applications. In parallel with the most investigated CsPbX 3 , its derivates, Cs 4 PbX 6 and CsPb 2 X 5 , with low-dimensional-networked structures have also attracted great attention. In this review, recent advancements on the low-dimensional-networked cesium lead halide perovs...

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Section: Applicationsmentioning

confidence: 99%

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

et al. 2020

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“…This was done with the intention of obtaining pure QDs while avoiding the formation of Cs 4 PbBr 6 . 21–25 Fig. S1† shows the material characterization of QDs prepared by using a molar ratio of 1 : 1 of CsBr : PbBr 2 (ESI†).…”

Section: Resultsmentioning

confidence: 99%

Stability and photocurrent enhancement of photodetectors by using core/shell structured CsPbBr₃/TiO₂ quantum dots and 2D materials

Maduwanthi,

Jong,

Mohammed

et al. 2024

Nanoscale Adv.

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“…The extracted −3 dB modulation bandwidth of CsPbBr 3 NCs–glass increased with the LD injection current increasing (Figure 5b), which may be due to the reduced radiative lifetime and the weakened reabsorption effect at higher light excitation intensity. [ 16 ] We choose the injection current of the LD from 50–100 mA because these currents can effectively excite the QDs and make the communication system in the best working state. And a maximum −3 dB bandwidth of ≈180 MHz of CsPbBr 3 NCs–glass at 100 mA of LD was obtained, which is superior to that of common rare‐earth or conventional QDs (such as CdTe and InP)‐based phosphors.…”

Section: Resultsmentioning

confidence: 99%

“…[ 10,14 ] Then some works followed by optimizing the communication bandwidth and rates of CsPbBr 3 NCs through doping or matrix regulation. [ 15–17 ]…”

Section: Introductionmentioning

confidence: 99%

Ultrastable Perovskite Nanocrystals in All‐Inorganic Transparent Matrix for High‐Speed Underwater Wireless Optical Communication

Xia

Zhu

Luo

et al. 2021

Advanced Optical Materials

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The key features of lead halide perovskites, including short emission lifetime and excellent luminous efficiency in the green emission region, perfectly match the strict requirements of underwater wireless optical communication (UWOC). However, the poor stability of perovskite nanocrystals (NCs) restricts its application under water and no relevant application research has been reported. Here, extremely stable CsPbBr3 NCs in all‐inorganic amorphous glass synthesized by all‐solid reaction without any organic ligand are reported. The products achieve high photoluminescence quantum yield (70%) as well as excellent stability toward water, thermal treatment (200 °C in air) and intensive laser irradiation (3.6 kW cm−2). The authors also raise that the refraction index could strongly influence the lifetime values according to the oscillator strength of radiative transitions. The large refraction index of the glass matrix enhances the radiative transition rates of CsPbBr3 NCs (decay time 3.22 ns). At last, the first application of perovskite NCs for UWOC is demonstrated, achieving a bandwidth as high as 180 MHz and data rates of 185 Mbps.

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Pump-power-dependence of a CsPbBr₃-in-Cs₄PbBr₆ quantum dot color converter

Cited by 8 publications

References 38 publications

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

Stability and photocurrent enhancement of photodetectors by using core/shell structured CsPbBr₃/TiO₂ quantum dots and 2D materials

Ultrastable Perovskite Nanocrystals in All‐Inorganic Transparent Matrix for High‐Speed Underwater Wireless Optical Communication

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Pump-power-dependence of a CsPbBr3-in-Cs4PbBr6 quantum dot color converter

Cited by 8 publications

References 38 publications

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

Stability and photocurrent enhancement of photodetectors by using core/shell structured CsPbBr3/TiO2 quantum dots and 2D materials

Ultrastable Perovskite Nanocrystals in All‐Inorganic Transparent Matrix for High‐Speed Underwater Wireless Optical Communication

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Resources

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Pump-power-dependence of a CsPbBr₃-in-Cs₄PbBr₆ quantum dot color converter

Stability and photocurrent enhancement of photodetectors by using core/shell structured CsPbBr₃/TiO₂ quantum dots and 2D materials