Pressure‐Treated Engineering to Harvest Enhanced Green Emission in Mn‐Based Organic–Inorganic Metal Halides at Ambient Conditions

Zhao, Xiaohui; Wu, Min; Líu, Hao; Wang, Yixuan; Wang, Kai; Yang, Xinyi; Zou, Bo

doi:10.1002/adfm.202109277

Cited by 45 publications

(41 citation statements)

References 47 publications

(23 reference statements)

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“…Wang et al synthesized a new 0D Mn-based organic–inorganic perovskite (2-aminobenzimidazole) 4 MnBr 6 with a red emission centered at 629 nm and a high PLQY of 80%, which arose from intrinsic 4 T 1 -to- 6 A 1 d-d transition . The above results all indicate that the photoluminescent properties of Mn-based organic–inorganic halide perovskites have a stable emission source, and the position of the emission peak can be adjusted to meet the needs through the regulation of organic cations or halogens, − so it inspires us to explore new Mn-based organic–inorganic halide perovskites.…”

Section: Introductionmentioning

confidence: 99%

A Red-Emitting Hybrid Manganese Halide Perovskite C₅H₅NOMnCl₂·H₂O Featuring One-Dimensional Octahedron Chains

Dai

Qiu

et al. 2022

Inorg. Chem.

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Herein, we successfully synthesized a new organic–inorganic hybrid manganese halide perovskite C5H5NOMnCl2·H2O, in which organic molecules, water molecules (through O atoms), and Cl atoms coordinate with Mn atoms to form deformed [MnO3Cl3] octahedrons. Then, octahedrons form a chain through edge sharing, resulting in a 1D-chain single crystal structure. The high-quality C5H5NOMnCl2·H2O single crystal prepared by a simple solvent evaporation method produced bright red emission at 656 nm attributed to the d-d transition of Mn2+. Also, it has a photoluminescence quantum yield (PLQY) of 24.2%. Photoluminescence excitation and absorption spectra were both featured with multiple bands and were in good agreement with the Mn2+ 3d energy levels. The photoluminescence decay spectrum showed an average lifetime of 0.466 ms, which further proves the d-d transition mechanism. The C5H5NOMnCl2·H2O single crystal had a direct band gap of 1.43 eV. Moreover, a red light LED with a CCT of 1857 K was obtained based on the C5H5NOMnCl2·H2O powder, indicating its promising application in red-emitting LED.

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Section: Introductionmentioning

confidence: 99%

A Red-Emitting Hybrid Manganese Halide Perovskite C₅H₅NOMnCl₂·H₂O Featuring One-Dimensional Octahedron Chains

Dai

Qiu

et al. 2022

Inorg. Chem.

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“…Until now, several equivalent and heterovalent ions, such as Sn(II), 17,18 Sn(IV), [19][20][21] Bi(III), 22 Sb(III) 23,24 and Mn(II), [25][26][27][28][29][30] have been incorporated to replace toxic lead to form metal halides with low toxicity and improved stability. Out of all the potential elements, In 3+ with a sixcoordinated metal ion is a promising candidate for the substitution of Pb 2+ .…”

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confidence: 99%

High quantum yield of In‐based halide perovskites for white light emission and flexible x‐ray scintillators

Liang

Liu

Luo

et al. 2022

EcoMat

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In-based halides always present low photoluminescence quantum yield (PLQY) because of poor absorption, limiting their potential applications inluminescence-related fields. In this work, zero-dimensional MA 4 InCl 7 [MA + :-CH 3 NH 3 + ] halides with different Sb 3+ doping level are prepared through solvent evaporating method. The Sb 3+ -doped MA 4 InCl 7 shows a broadband yellow emission with full width at half-maximum of 180 nm and a high PLQY of 84%. Such broadband emission originates from the self-trapped excitons demonstrated by experimental results and theoretical calculations. Additionally, the Sb 3+ -doped MA 4 InCl 7 is further employed to fabricate white-lightemitting diodes, which possesses high color rendering index of 91 and excellent operating stability up to 400 h. Moreover, flexible Sb 3+ -doped MA 4 InCl 7 films are also prepared as x-ray scintillators, exhibiting low detection limit of 63.3 nGy air /s and high spatial resolution of 10.0 lp/mm. Thus, this work provides guidance to design perovskite-based devices with bright luminescence and x-ray detection with excellent flexibility.indium-based halides, photoluminescence, Sb 3+ doping, white light-emitting diodes, x-ray scintillators | INTRODUCTIONRecently, metal halides have gained significant research interest in phosphor conversion light-emitting diodes (LEDs) because of their extraordinary luminescence features such as tunable emission, high color purity and high photoluminescence quantum yield (PLQY). [1][2][3][4][5][6] Despite the rapid progress of metal halides in LEDs, 7-14 the actual commercialization of the emerging materials also suffer with some unavoidable problems that is, toxicity element of Pb and instability under ambient moisture, oxygen, ultraviolet (UV) light and heat. 3,15,16 Such challenges motivate researchers to explore environmental friendly and stable metal halides.

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“…For high-pressure photoluminescence (HP-PL) experiments, a 15× microscope objective focused light on the sample mounted in the DAC. [39,40] The PL spectra were dispersed by a 600 groove per millimeter diffraction grating and accumulated 5 times with an exposing time of 10s. The pressure exerting and calibration were alike to the aforementioned methods.…”

Section: Methodsmentioning

confidence: 99%

Dangling Octahedra Enable Edge States in 2D Lead Halide Perovskites

Qin

Gao

et al. 2022

Advanced Materials

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The structural reconstruction at the crystal layer edges of 2D lead halide perovskites (LHPs) leads to unique edge states (ES), which are manifested by prolonged carrier lifetime and reduced emission energy. These special ES can effectively enhance the optoelectronic performance of devices, but their intrinsic origin and working mechanism remain elusive. Here it is demonstrated that the ES of a family of 2D Ruddlesden–Popper LHPs [BA2CsPb2Br7, BA2MAPb2Br7, and BA2MA2Pb3Br10 (BA = butylammonium; MA = methylammonium)] arise from the rotational symmetry elevation of the PbBr6 octahedra dangling at the crystal layer edges. These dangling octahedra give rise to localized electronic states that enable an effective transport of electrons from the interior to layer edges, and the population of electrons in both the interior states and the ES can be manipulated via controlling the external fields. Moreover, the abundant phonons, activated by the dangling octahedra, can interact with electrons to facilitate radiative recombination, counterintuitive to the suppressive role commonly observed in conventional semiconductors. This work unveils the intrinsic atomistic and electronic origins of ES in 2D LHPs, which can stimulate the exploration of ES‐based exotic optoelectronic properties and the corresponding design of high‐performance devices for these emergent low‐dimensional semiconductors.

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Pressure‐Treated Engineering to Harvest Enhanced Green Emission in Mn‐Based Organic–Inorganic Metal Halides at Ambient Conditions

Cited by 45 publications

References 47 publications

A Red-Emitting Hybrid Manganese Halide Perovskite C₅H₅NOMnCl₂·H₂O Featuring One-Dimensional Octahedron Chains

A Red-Emitting Hybrid Manganese Halide Perovskite C₅H₅NOMnCl₂·H₂O Featuring One-Dimensional Octahedron Chains

High quantum yield of In‐based halide perovskites for white light emission and flexible x‐ray scintillators

Dangling Octahedra Enable Edge States in 2D Lead Halide Perovskites

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Pressure‐Treated Engineering to Harvest Enhanced Green Emission in Mn‐Based Organic–Inorganic Metal Halides at Ambient Conditions

Cited by 45 publications

References 47 publications

A Red-Emitting Hybrid Manganese Halide Perovskite C5H5NOMnCl2·H2O Featuring One-Dimensional Octahedron Chains

A Red-Emitting Hybrid Manganese Halide Perovskite C5H5NOMnCl2·H2O Featuring One-Dimensional Octahedron Chains

High quantum yield of In‐based halide perovskites for white light emission and flexible x‐ray scintillators

Dangling Octahedra Enable Edge States in 2D Lead Halide Perovskites

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A Red-Emitting Hybrid Manganese Halide Perovskite C₅H₅NOMnCl₂·H₂O Featuring One-Dimensional Octahedron Chains

A Red-Emitting Hybrid Manganese Halide Perovskite C₅H₅NOMnCl₂·H₂O Featuring One-Dimensional Octahedron Chains