Centimeter-size square 2D layered Pb-free hybrid perovskite single crystal (CH3NH3)2MnCl4 for red photoluminescence

Cheng, Xiaohua; Lin, Jianming; Yuan, Ye; Du, Songjie; Yao, Qing; Zhang, Jie; Ding, Jianxu; Zhou, Tianliang

doi:10.1039/c9ce00591a

Cited by 40 publications

(48 citation statements)

References 41 publications

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“…[ 79b ] The long‐chain A + cations lead to a larger tolerance factor t > 1 for 2D PVSK structure, while for a stable 3D structure the tolerance factor is required to be between 0.8 and 1. [ 82 ] Moreover, the layers of A + cations work as “barriers” for carriers due to the large bandgap, meanwhile, the layers of 3D PVSK B + cations serve as “wells.” The wells’ thickness of these intrinsic quantum well structures is determined by the index n, which can be easily tailored, leading to the tunable optical and electronic properties. [ 79a ] The optical bandgap values decrease monotonically with increasing n as a result of the gradually weakened quantum confinement effect, [ 83 ] accompanied with the optical color gets darker and the PL peak shifts toward shorter wavelength.…”

Section: Synthesis Methodsmentioning

confidence: 99%

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Perovskite Single Crystals: Synthesis, Optoelectronic Properties, and Application

Han

et al. 2020

Adv Funct Materials

118

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Recently, lead halide perovskite (PVSK) polycrystalline films have drawn much attention as photoactive material and scored tremendous achievements in solar cells, photodetectors, light‐emitting diodes, and lasers owing to their engrossing optoelectronic properties and facile solution‐processed fabrication. However, large amounts of grain boundaries unfavorably induce ion migration, surface defect, and poor stability, impeding PVSK polycrystalline film‐based optoelectronic devices from practical application. In comparison with the polycrystalline counterparts, PVSK single crystals (SCs) with lower trap density serve as a better platform for not only fundamental research but also device applications. In light of this, the idea of using PVSK single crystals (SCs) to construct the optoelectronic devices is then proposed. Since then, a series of synthesis methods of PVSK SCs have emerged. In this review, recent progress of synthesis method of PVSK SCs is tried to be summarized and their advantages and limitations are analyzed. And then, the optoelectronic properties including carrier dynamic, defects, ion migration, and instability issues in these 3D and 2D PVSK SCs are overviewed and accordingly the proper device configurations of corresponding solar cells, photodetectors, X‐ray, γ‐ray detectors, etc., are proposed. It is believed that this review can provide the guidance for the further development of PVSK SCs and their applications.

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Section: Synthesis Methodsmentioning

confidence: 99%

Section: Synthesis Methodsmentioning

confidence: 99%

Perovskite Single Crystals: Synthesis, Optoelectronic Properties, and Application

Han

et al. 2020

Adv Funct Materials

118

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“…Absolute external quantum efficiencies were measured by using an integrating sphere coupled to a commercial spectrofluorimeter ( Figure S6). Full description of the set-up is reported elsewhere, 10,11 briefly, the device is based upon a Labsphere optical Spectralon integrating sphere (100 mm diameter), which provides high reflectance in the UV-visible and near-infrared region. The sphere accessories were made from Teflon (rod and sample holders) or Spectralon (baffle).…”

Section: Photoluminescence Quantum Efficiency Photoexcitation 3d Plotsmentioning

confidence: 99%

Efficient Emission in Halide Layered Double Perovskites: The Role of Sb3+ Substitution in Cs4Cd1–xMnxBi2Cl12 Phosphors

Vargas¹,

Coutiño-González²,

Ovalle-Encinia³

et al. 2020

Preprint

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Layered halide perovskites and double perovskites optoelectronic properties have recently been the subject of intense research. Layered double perovskites represent the merging of both worlds, and as such, have the potential to further expand the already vast space of optoelectronic properties and applications of halide perovskites. Despite having more than 40 known members, to date, only the <111>-oriented layered double perovskites: Cs4Cd1–xMnxBi2Cl12, have shown efficient photoluminescence (PL). In this work, we replaced Bi with Sb to further investigate the electronic structure and PL properties of these materials, resulting in two new families of layered inorganic perovskites alloys with full solubility. The first family, Cs4Cd1–xMnSb2Cl12, exhibits a PL emission at 605 nm ascribed to Mn2+ centers in octahedral coordination, and a maximum photoluminescence quantum yield PLQY of 28.5%. The second family of alloys, also with full solubility, Cs4Cd0.8Mn0.2(Sb1–yBiy)2Cl12, contains a fixed amount of Mn2+ and Cd2+ cations but different concentrations of the trivalent metals. This variability allows the tuning of the PL emission from 603 nm to 614 nm. We show that the decreased efficiency of the Cs4Cd1–xMnxSb2Cl12family compared to Cs4Cd1–xMnxBi2Cl12, is mostly due to a decreased spin-orbit coupling in Sb and the subsequent increased electronic delocalization compared to the Bi alloys, reducing the energy transfer to Mn2+ centers. This work lays out a roadmap to understand and achieve high photoluminescence efficiencies in layered double perovskites.

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“…The energy levels of Mn 2+ transitions depend on the crystal field generated by the ions in the host lattice, so different materials will have different crystal fields and therefore different transition energies. [2][3][4] Figure S4. Normalized absorbance spectra calculated from diffuse reflectance measurements of the materials for x = 0.0, 0.05, 0.10, 0.15, 0.20, 0.30, 0.50 and 1.0.…”

Section: Uv-vis Absorption Spectramentioning

confidence: 99%

“…Absolute external quantum efficiencies were measured by using an integrating sphere coupled to a commercial spectrofluorimeter ( Figure S10). [6] Full description of the set-up is reported elsewhere, 3,4 briefly, the device is based upon a Labsphere optical Spectralon integrating sphere (100 mm diameter), which provides high reflectance in the UV-visible and near infrared region. The sphere accessories were made from Teflon (rod and sample holders) or Spectralon (baffle).…”

Section: Photoluminescence Quantum Efficiency Photoexcitation 3d Plotsmentioning

confidence: 99%

Enhanced Luminescence and Mechanistic Studies on Mn-doped Double Layered Perovskite Phosphors: Cs4Mn1−xCdxBi2Cl12

Vargas¹,

Reyes-Castillo²,

Coutiño-González³

et al. 2020

Preprint

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Halide perovskites offer great promise for optoelectronic applications, but stability issues continue to hinder its implementation and long-term stability. The stability of all-inorganic halide perovskites and the inherent quantum confinement of low dimensional perovskites can be harnessed to synthesize materials with high PL efficiency. An example of such materials is the recently reported new family of layered double perovskites, Cs4Mn1−xCdxBi2Cl12. Herein, we report a new synthetic procedure that enhances the maximum PLQY of this family materials to up 79.5%, a 20% enhancement from previous reports and the highest reported for a Mn-doped halide perovskite. Importantly, stability tests demonstrate that these materials are very stable towards humidity, UV irradiation, and temperature. Finally, we investigated the photophysics, the effects of magnetic coupling and temperature in the PL efficiency and proposed a mechanism for the emission process. Our results highlight the potential of this family of materials and related layered all-inorganic perovskites for solid-state lighting and optoelectronic applications

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Centimeter-size square 2D layered Pb-free hybrid perovskite single crystal (CH₃NH₃)₂MnCl₄ for red photoluminescence

Abstract: Centimeter-size 2D layered Pb-free (CH3NH3)2MnCl4 single crystal was grown by using different ways and proved to have good luminous via fabricating LED device.

Cited by 40 publications

References 41 publications

Perovskite Single Crystals: Synthesis, Optoelectronic Properties, and Application

Perovskite Single Crystals: Synthesis, Optoelectronic Properties, and Application

Efficient Emission in Halide Layered Double Perovskites: The Role of Sb3+ Substitution in Cs4Cd1–xMnxBi2Cl12 Phosphors

Enhanced Luminescence and Mechanistic Studies on Mn-doped Double Layered Perovskite Phosphors: Cs4Mn1−xCdxBi2Cl12

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