Temperature-dependent photoluminescence and lasing properties of CsPbBr3 nanowires

Liu, Zhen; Shang, Qiuyu; Li, Chun; Zhao, Liyun; Gao, Yan; Li, Qi; Chen, Jie; Zhang, Shuai; Liu, Xinfeng; Fu, Ying-Shuang; Zhang, Qing

doi:10.1063/1.5082759

Cited by 66 publications

(47 citation statements)

References 63 publications

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“…The inhomologous SE broaden (Figure 4b), arising from the scatterings with disorder and imperfections, is ≈14.13 meV, which is significantly lower than those reported in CsPbBr 3 NWs (≈36 meV), CsPbBr 3 nanocrystals (≈40 meV), and CsPbBr 3 single crystals (≈33 meV). [ 46–48 ] The as‐extracted exciton–longitudinal optical phonon coupling strength of ≈88.45 meV is also smaller than our previous reported value (204 meV). Furthermore, the thermal expansion coefficient in 110 nm wide NW is 288.41 μeV K −1 (Figure 4c, red) and quite larger than that in 500 nm wide NW (48 μeV K −1 , Figure 4c, violet), which may be due to enhanced lattice distortion in thinner NWs.…”

Section: Figurecontrasting

confidence: 63%

Graphoepitaxy of Large Scale, Highly Ordered CsPbBr₃ Nanowire Array on Muscovite Mica (001) Driven by Surface Reconstructed Grooves

Zhao

Fan

et al. 2020

Advanced Optical Materials

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Muscovite mica [KAl 2 (Si 3 Al)O 10 (OH) 2 ] is a good electrical and thermal insulator with stable physical and chemical properties. [1] As a layered crystal, bulk muscovite can be compressed into 2D nanosheets by mechanical or chemical exfoliation, which has sparked attention since the emergence of graphene. Few-layered muscovite exhibits useful physical properties, such as excellent proton and electrical conductivity, efficient cations exchange for pollutants, etc. [2-5] Moreover, due to weak interlayer interactions, naturally cleaved muscovite (001) can be easily achieved without active surface dangling bonds. Thus, as a consequence of the atomic-level flatness, it has become one of the most frequently used substrates in van der Waals epitaxial technologies. A variety of emergent materials, including II-VI/III-V semiconductors, [6-9] transition metal dichalcogenides, [10] metal halide perovskites, [11-19] topological insulators, [20] and oxides, [21] were grown on muscovite (001) in the past decades. These single crystals exhibited superior optoelectronic and electronic properties, compared to those grown on nonlayered substrates. In most of these reports, a quasi-hexagonal lattice was considered inherent from the geometry of the topmost (Si, Al)-O aluminosilicate tetrahedra layer, leading to the tridirection epitaxy of the as-deposited crystals along the [100], [110], and [101] directions. [11,14,20,21] However, the latest spectroscopy studies on the surface lattice of muscovite (001) showed that the aluminosilicate tetrahedra were distorted and the surface trigonal symmetry was partially broken. [22] The surface reconstruction may not only provide a powerful platform to fabricate large scale anisotropic structures as demonstrated in organic molecules and crystals, but also can be applied to anisotropic few-layered muscovite devices. [2,4,21] Metal halide perovskites combine the advantages of both organic and inorganic semiconductors, such as ease of fabrication, large exciton binding energy, and low trapping states, to achieve high performance electronic and optical devices. [23-25] Among the perovskite family, all-inorganic CsPbBr 3 has drawn wide attention due to its excellent photoluminescence (PL) quantum yield with environmental stability. [26-32] Especially, 1D nanowire (NW) of CsPbBr 3 has been considered as

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Section: Figurecontrasting

confidence: 63%

Graphoepitaxy of Large Scale, Highly Ordered CsPbBr₃ Nanowire Array on Muscovite Mica (001) Driven by Surface Reconstructed Grooves

Zhao

Fan

et al. 2020

Advanced Optical Materials

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“…Moreover, as shown in Figure c, even when the temperature is as high as 140 K, the RPP still lases above threshold. Whereas, since the electron–phonon scattering becomes stronger at higher temperatures, the lasing threshold increases and the emission wavelength is longer at higher temperature …”

Section: Auger Decay Lifetime (τAuger) At High Excitation Fluence (P mentioning

confidence: 99%

Lasing from Mechanically Exfoliated 2D Homologous Ruddlesden–Popper Perovskite Engineered by Inorganic Layer Thickness

et al. 2019

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approach to realize new functionalities through facile van der Waals coupled 2D layers. [6] Owing to the large dielectric mismatch between the inorganic and organic layers, the quasi-2D RPPs naturally form quantum well structures, in which, the inorganic and organic layers serve as potential wells and barriers, respectively. [7] Moreover, these quantum confined structures impart the appealing characteristics of improved environmental stability and enhanced exciton confinement. [2] These make the quasi-2D RPPs promising for solar cell and light-emitting diode (LED) applications. [5,[8][9][10] Recently, the amplified spontaneous emission (ASE) and lasing behaviors of 2D RPPs have been demonstrated. [11][12][13][14][15][16][17] However, the lasing is mostly obtained from solution-processed spin-coated thin films, in which multiple RPP components inevitably form with different bandgaps that drive cascade carrier transfer and may reshape the build-up of population inversion. [11,14,15,18] Also, the development of continuous-wave or electrically driven RPP lasers central for practical applications is still challenging. The exploitation of homologous RPP lasers is of great importance to gain further insights into the intrinsic lasing mechanisms of these quantum well-like structures as well as the design of low-threshold 2D 2D Ruddlesden-Popper perovskites (RPPs) have aroused growing attention in light harvesting and emission applications owing to their high environmental stability. Recently, coherent light emission of RPPs was reported, however mostly from inhomologous thin films that involve cascade intercompositional energy transfer. Lasing and fundamental understanding of intrinsic laser dynamics in homologous RPPs free from intercompositional energy transfer is still inadequate. Herein, the lasing and loss mechanisms of homologous 2D (BA) 2 (MA) n −1 Pb n I 3n+1 RPP thin flakes mechanically exfoliated from the bulk crystal are reported. Multicolor lasing is achieved from the large-n RPPs (n ≥ 3) in the spectral range of 620-680 nm but not from small-n RPPs (n ≤ 2) even down to 78 K. With decreasing n, the lasing threshold increases significantly and the characteristic temperature decreases as 49, 25, and 20 K for n = 5, 4, and 3, respectively. The n-engineered lasing behaviors are attributed to the stronger Auger recombination and exciton-phonon interaction as a result of the enhanced quantum confinement in the smaller-n perovskites. These results not only advance the fundamental understanding of loss mechanisms in both inhomologous and homologous RPP lasers but also provide insights into developing low-threshold, substrate-free, and multicolor 2D semiconductor microlasers.2D Ruddlesden-Popper perovskites (RPPs), with the general chemical formula of L 2 (MA) n−1 M n X 3n+1 , are composed of welldefined inorganic layers with corner connected [MX 6 ] 4− octahedra and long organic chains (L + ) intercalated between these inorganic fragments. [1][2][3][4][5] This structure promises a viable

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“…6,7 The applications of inorganic metal halide perovskites include light absorbers, 8 solar cells, 9,10 light-emitting diodes, 11,12 photodetectors, [13][14][15][16][17] and laser diodes. [18][19][20] A CsPbBr 3 perovskite was reported to have an orthorhombic Pbnm structure at room temperature, a tetragonal P4/mbm phase between 361 and 403 K, and a cubic Pm-3m structure above 403 K. 21 However, Burwig et al were able to detect a cubic phase between 458 and 633 K, but not the tetragonal phase. 22 In a recent report, Zeng et al have discovered that CsPbBr 3 transforms from an orthorhombic to a tetragonal phase under photon irradiation with a negligible temperature increase.…”

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Thermal stability of CsPbBr3 perovskite as revealed by in situ transmission electron microscopy

et al. 2019

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The thermal stability of all-inorganic halide perovskites is their key advantage over organic/hybrid halide perovskites. Here, in situ highresolution transmission electron microscopy (HRTEM) was used to directly investigate crystallography dynamics of a CsPbBr 3 perovskite at high temperature (up to 690 K). In high vacuum TEM conditions (∼10 −5 Pa), CsPbBr 3 nanocrystals possessed superb stability at temperatures below 690 K. By sealing the crystals in amorphous carbon, their melting and solidification processes were directly observed at temperatures of 840 K and 838 K, respectively. This study should be valuable for future perovskite-containing solar cells, lasers, light-emitting diodes, and photodetectors working at high temperatures.

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Temperature-dependent photoluminescence and lasing properties of CsPbBr3 nanowires

Cited by 66 publications

References 63 publications

Graphoepitaxy of Large Scale, Highly Ordered CsPbBr₃ Nanowire Array on Muscovite Mica (001) Driven by Surface Reconstructed Grooves

Graphoepitaxy of Large Scale, Highly Ordered CsPbBr₃ Nanowire Array on Muscovite Mica (001) Driven by Surface Reconstructed Grooves

Lasing from Mechanically Exfoliated 2D Homologous Ruddlesden–Popper Perovskite Engineered by Inorganic Layer Thickness

Thermal stability of CsPbBr3 perovskite as revealed by in situ transmission electron microscopy

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Temperature-dependent photoluminescence and lasing properties of CsPbBr3 nanowires

Cited by 66 publications

References 63 publications

Graphoepitaxy of Large Scale, Highly Ordered CsPbBr3 Nanowire Array on Muscovite Mica (001) Driven by Surface Reconstructed Grooves

Graphoepitaxy of Large Scale, Highly Ordered CsPbBr3 Nanowire Array on Muscovite Mica (001) Driven by Surface Reconstructed Grooves

Lasing from Mechanically Exfoliated 2D Homologous Ruddlesden–Popper Perovskite Engineered by Inorganic Layer Thickness

Thermal stability of CsPbBr3 perovskite as revealed by in situ transmission electron microscopy

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Graphoepitaxy of Large Scale, Highly Ordered CsPbBr₃ Nanowire Array on Muscovite Mica (001) Driven by Surface Reconstructed Grooves

Graphoepitaxy of Large Scale, Highly Ordered CsPbBr₃ Nanowire Array on Muscovite Mica (001) Driven by Surface Reconstructed Grooves