Investigation on lead-free Mn-doped Cs2NaInCl6 double perovskite phosphors and their optical properties

Zhang, Leilei; Xie, Xiaoyu; Li, Dongliang; Yuan, Yongfang; Xue, Xiaogang; Li, Qingning; Xu, Jiwen; Wang, Hua; Hu, Fangrong; Zhang, Xiaowen

doi:10.1016/j.optmat.2021.111802

Cited by 27 publications

(20 citation statements)

References 36 publications

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“…However, such a replacement would cause a reduction in dimensionality and charge imbalance if only the trivalent ions are used. − Based on isoelectronic theory, this issue can be addressed by using a proper monovalent cation in conjunction with trivalent ions to generate double perovskites A 2 M I M III X 6 (A = Cs; M I = Na, K, Ag; M III = Bi, In, and Sb, and X = Cl, Br, I). However, most lead-free double perovskites exhibit low photoluminescence (PL) due to indirect bandgap or parity forbidden transitions. − Through appropriate ion doping or alloying, the bandgap of double perovskites can be altered or their structural symmetry can be broken, which can break the partial forbidden transition and thereby enhance their optical properties. , Various dopants, such as Sb 3+ , Mn 2+ , and Ln 3+ , have been studied for doping double perovskites. − …”

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confidence: 99%

Competing Energy Transfer-Modulated Dual Emission in Mn²⁺-Doped Cs₂NaTbCl₆ Rare-Earth Double Perovskites

Chen

Zeng

Wei

et al. 2022

J. Phys. Chem. Lett.

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A2BIBIIIX6 double perovskites are promising materials due to their outstanding photoelectronic properties and excellent stability in the environment. Herein, we synthesized Mn2+:Cs2NaTbCl6 with dual emission through a solvothermal method for the first time. Mn2+:Cs2NaTbCl6 double perovskites exhibit excellent environmental stability and high photoluminescence quantum yields (PLQYs). The Cs2NaTbCl6 was successfully doped with Mn2+ in two modes: at Mn-feeding concentrations below 1%, Mn2+ first tend to insert into the interstitial void, but if the Mn-feeding concentration exceeds 1%, Mn2+ will further substitute Na+ site of the Cs2NaTbCl6 lattice and thus both two doping modes coexist. After Mn2+ doping, efficient energy transfer from the 5D4 level of Tb3+ ions to the 4T1 level of Mn2+ ions occurs, resulting in tunable dual emission from the Tb3+5D4 → 7FJ=6,5,4,3 transition and Mn2+4T1 → 6A1 transition. Further, LED based on the Mn2+:Cs2NaTbCl6 double perovskites exhibits excellent performance and stability. This work demonstrates a strategy to achieve novel lanthanide-based double perovskites with potential applications in photonics.

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confidence: 99%

Competing Energy Transfer-Modulated Dual Emission in Mn²⁺-Doped Cs₂NaTbCl₆ Rare-Earth Double Perovskites

Chen

Zeng

Wei

et al. 2022

J. Phys. Chem. Lett.

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“…Newly emerged double perovskite phosphors are highly spotlighted due to their potential applications to stylish displays and lighting. The lead-free metal halide double perovskite of A 2 M I M III X 6 (A = Cs + ; M I = Cu + , Ag + , Na + , K + ; M III = Bi 3+ , Sb 3+ , In 3+ ; X = Cl, Br, I) possesses specific 3D electronic structure, good stability, and environment-friendly sustainability, receiving increasing attentions in luminescence researches [1][2][3]. Cs 2 AgBiX 6 (X = Cl, Br) is the first reported fluorescence material with double perovskite structure in 2016 [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Cs 2 AgBiX 6 (X = Cl, Br) is the first reported fluorescence material with double perovskite structure in 2016 [4][5][6]. Sb-or Mn-doped Cs 2 NaInCl 6 are also good representatives of double perovskite phosphors [3,[7][8][9]. Cs 2 KBiCl 6 shows similar double perovskite structure and could be considered as a promising phosphor.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and luminescence properties of Mn-doped Cs2KBiCl6 double perovskite phosphors

et al. 2023

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Novel lead-free double perovskite phosphors of Mn-doped Cs2KBiCl6 (Cs2KBiCl6:Mn2+) have been facilely synthesized by using typical hydrothermal method. X-ray diffraction, scanning electron microscope, X-ray photoelectron spectroscopy, electron paramagnetic resonance, and photoluminescence measurements confirm that the synthesized Cs2KBiCl6:Mn2+ phosphors behave double perovskite structure, good morphology, excellent stability, and superior optical properties. An optimal doping concentration of Mn/Bi = 0.4 is achieved in Cs2KBiCl6:Mn2+ phosphors, showing maximum photoluminescence quantum yield of 87.2%, lifetime of 0.98 ms, and orange-red fluorescence with the emission peak at 595 nm under UV light excitation. The probable luminescence mechanism could be ascribed to excitation energy transferring from Cs2KBiCl6 to Mn, and accordingly contributing to the 4T1–6A1 transition of the Mn d electron. Superb optical properties provide much room for in-depth fluorescence researches and potential applications of Cs2KBiCl6:Mn2+ phosphors.

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“…On the other hand, direct bandgap semiconductors, which are used in the photovoltaic applications, because it has small energy loss, be more readily inspired, and be better capable of completing the photoelectric conversion [23]. Over the years, many halide DPs have been investigated both theoretically and experimentally including Cs2AgInCl6, Cs2NaInCl6, Cs2AgTlX6 (X = Cl, Br), Cs2InSbCl6 as well as the alloyed structures of these compound exhibit direct band gap and excellent PCE [24]- [30]. Recently, a new theoretical study has reported the stability of Cs2NaTlBr6 double perovskite, they have found a direct bandgap of 1.82 eV which can be a suitable candidate for photovoltaic solar cell [31].…”

Section: Introductionmentioning

confidence: 99%

An Artificial Neural Network Method for Managing Inventory of A Fertilizer Company in Bangladesh

Hasan

Akhter

2022

Dhaka Univ. J. Sci.

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Business organizations are always facing uncertainties in demand, supply and inventories. For this, it is important for them to make the strategic plans to cope up with the uncertainty accordingly. To sustain, the business organizations must plan the future in such a way that the inventory cost, labor cost will be minimized and the utilization of time, financial resources and profit will be maximized. The optimum planning of resources also help the organizations to avoid wastage. A good forecasting technique can help the manager of a company to deal with the uncertainties. In this paper, we will work on such a planning fora fertilizer company in Bangladesh. To minimize the inventory cost, we will apply a new approach known as Artificial Neural Network (ANN), which is recently used for the problem of prediction and analyze the main characteristics of a system through an iterative training process. For this, we will first forecast the demand of fertilizer by using existing forecasting methods. We will then apply ANN for forecasting the demand of fertilizer of the company. We will also identify Economic Order Quantity (EOQ) to minimize total cost including inventory costs of the company. We use programming language MATLAB for analyzing different forecasting methods including ANN. Finally, we will use these results to find out the right forecasting technique for the fertilizer company with optimal inventory cost. Dhaka Univ. J. Sci. 69(3): 133-142, 2022 (June)

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Investigation on lead-free Mn-doped Cs2NaInCl6 double perovskite phosphors and their optical properties

Cited by 27 publications

References 36 publications

Competing Energy Transfer-Modulated Dual Emission in Mn²⁺-Doped Cs₂NaTbCl₆ Rare-Earth Double Perovskites

Competing Energy Transfer-Modulated Dual Emission in Mn²⁺-Doped Cs₂NaTbCl₆ Rare-Earth Double Perovskites

Synthesis and luminescence properties of Mn-doped Cs2KBiCl6 double perovskite phosphors

An Artificial Neural Network Method for Managing Inventory of A Fertilizer Company in Bangladesh

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Investigation on lead-free Mn-doped Cs2NaInCl6 double perovskite phosphors and their optical properties

Cited by 27 publications

References 36 publications

Competing Energy Transfer-Modulated Dual Emission in Mn2+-Doped Cs2NaTbCl6 Rare-Earth Double Perovskites

Competing Energy Transfer-Modulated Dual Emission in Mn2+-Doped Cs2NaTbCl6 Rare-Earth Double Perovskites

Synthesis and luminescence properties of Mn-doped Cs2KBiCl6 double perovskite phosphors

An Artificial Neural Network Method for Managing Inventory of A Fertilizer Company in Bangladesh

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Competing Energy Transfer-Modulated Dual Emission in Mn²⁺-Doped Cs₂NaTbCl₆ Rare-Earth Double Perovskites

Competing Energy Transfer-Modulated Dual Emission in Mn²⁺-Doped Cs₂NaTbCl₆ Rare-Earth Double Perovskites