Mn-doped 2D Sn-based perovskites with energy transfer from self-trapped excitons to dopants for warm white light-emitting diodes

Hou, Lu; Zhu, Yihua; Zhu, Jingrun; Gong, Yiqin; Li, Chunzhong

doi:10.1039/d0tc00959h

Cited by 26 publications

(26 citation statements)

References 36 publications

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“…At the same time, the time‐resolved PL decay curve monitoring at 619 nm is fitted by a double‐exponential function with a shorter‐lived component (3.9065 μ s) and a longer‐lived component (14.6946 μ s) with amplitude of 39.66 % and 60.34 %, respectively, which gives an average lifetime of 9.8016 μ s for [AEP]Pb 0.952 Mn 0.048 Br 5 ⋅ H 2 O (Figure S13). Such long lifetime is comparable with those of previously reported Mn 2+ doped 2D (BA) 2 PbX 4 , (C 8 H 17 NH 2 ) 2 PbBr 4 , etc, which further proves that this broadband emission can be attributed to the spin‐forbidden d ‐ d transition ( 4 T 1 – 6 A 1 ) of Mn 2+ [81–82] . Based on these systematical characterizations and previously reported work, we propose the energy transition mechanism of luminescence process in [AEP]Pb 1–x Mn x Br 5 ⋅ H 2 O [28–29] .…”

Section: Resultssupporting

confidence: 90%

Bulk Mn²⁺ Doped 1D Hybrid Lead Halide Perovskite with Highly Efficient, Tunable and Stable Broadband Light Emissions

Jing

Yin

Xiao

et al. 2021

Chemistry A European J

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Mn2+ doped colloidal three‐dimensional (3D) lead halide perovskite nanocrystal (PNC) has attracted intensive research attention; however, the low exciton binding energy and fatal optical instability of 3D PNC seriously hinder the optoelectronic application. Therefore, it remains significant to explore new stable host perovskite with strongly bound exciton to realize more desirable luminescent property. In this work, we utilized bulk one‐dimensional (1D) hybrid perovskite of [AEP]PbBr5 ⋅ H2O (AEP=N‐aminoethylpiperazine) as structural platform to rationally optimize the luminescent property by a controllable Mn2+ doping strategy. Significantly, the series of Mn2+‐doped 1D [AEP]PbBr5 ⋅ H2O show enhanced energy transfer efficiency from the strongly bound excitons of host material to 3d electrons of Mn2+ ions, resulting in tunable broadband light emissions from weak yellow to strong red spectral range with highest photoluminescence quantum yield up to 28.41 %. More importantly, these Mn2+‐doped 1D perovskites display ultrahigh structural and optical stabilities in humid atmosphere, water and high temperature exceeding the conventional 3D PNC. Combined highly efficient, tunable and stable broadband light emissions enable Mn2+‐doped 1D perovskite as excellent down‐converting phosphor showcasing the potential application in white light emitting diode. This work not only provides a profound understanding of low‐dimensional perovskites but also opens a new way to rationally design high‐performance broadband light emitting perovskites for solid‐state lighting and displaying devices.

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Section: Resultssupporting

confidence: 90%

Bulk Mn²⁺ Doped 1D Hybrid Lead Halide Perovskite with Highly Efficient, Tunable and Stable Broadband Light Emissions

Jing

Yin

Xiao

et al. 2021

Chemistry A European J

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“…As shown in Figure 2a, a series of only (001) reflections in X‐ray diffraction (XRD) indicates that (C 8 H 17 NH 2 ) 2 Pb 1− x Mn x Br 4 ( x = 0, 0.05, 0.36, and 0.46) conforms to the characteristic of highly oriented 2D single‐layered perovskites, where the organic layers and the inorganic frames are periodically arranged. [ 32,33 ] With increasing x , the periodic diffractions of (C 8 H 17 NH 2 ) 2 Pb 1− x Mn x Br 4 remain unchanged, indicating that doping does not change the crystal structure of the host. We observe that all the XRD peaks in Mn‐doped perovskites shift to the higher angle compared with undoped perovskites.…”

Section: Resultsmentioning

confidence: 99%

“…The DFT calculation results show that the top of the valence band is mainly occupied by the orbitals of Br while the bottom of the conduction band is mainly occupied by the orbits of Pb and Mn, which is consistent with the previous reports. [ 32 ]…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Gram‐Scale Ultrastable Mn‐Doped 2D Perovskites for Light‐Emitting Diodes

Hou

Zhu

et al. 2021

Adv Materials Inter

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Mn‐doped 2D perovskites are emerging as good candidates for light‐emitting applications due to their excellent optical and electrical properties. Major synthetic routes, solid‐state grinding and high‐temperature solution synthesis, are extensively studied to prepare Mn‐doped 2D perovskites. However, complicated synthesis, small‐scale yields, and poor‐stability impede their widespread applications. Herein, a one‐step acid‐solution‐assisted method is exhibited for gram‐scale production of Mn‐doped 2D (C8H17NH2)2PbBr4 with a solid yield of 1.35 g products out of 3 mL solvent. After Mn‐doped 2D (C8H17NH2)2PbBr4 being stored in the air for 90 days, the photoluminescence (PL) quantum yield of powders has minor changes, showing good stability. Phosphor‐converted monochrome light‐emitting diodes (LEDs) are fabricated. After the LEDs work 6 h under a voltage of 3 V, their PL spectra have no obvious change, showing a great potential in optoelectronic devices. This study provides a new effective strategy for large‐scale synthesis of ultrastable Mn‐doped 2D perovskites, which is expected to provide inspiration for the industrial optoelectronic applications of perovskites.

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“…[ 148 ] Doping of Mn 2+ in octylammonium tin bromide resulted in a red shift of the PL present in the pure material, showing orange‐red light. [ 149 ] Although additional tuning of the optical properties seems possible, these studies show that the PLQY decreases with the introduction of the dopant, hence other dopants should be explored. The absorbance and luminescence of (PEA) 2 SnI 4 is shown in Figure a, a prototypical case of the 〈100〉‐type perovskites, which we will discuss in detail.…”

Section: Low‐dimensional Layered Perovskitesmentioning

confidence: 99%

Tin Halide Perovskites: From Fundamental Properties to Solar Cells

et al. 2021

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Metal halide perovskites have unique optical and electrical properties, which make them an excellent class of materials for a broad spectrum of optoelectronic applications. However, it is with photovoltaic devices that this class of materials has reached the apotheosis of popularity. High power conversion efficiencies are achieved with lead‐based compounds, which are toxic to the environment. Tin‐based perovskites are the most promising alternative because of their bandgap close to the optimal value for photovoltaic applications, the strong optical absorption, and good charge carrier mobilities. Nevertheless, the low defect tolerance, the fast crystallization, and the oxidative instability of tin halide perovskites currently limit their efficiency. The aim of this review is to give a detailed overview of the crystallographic, photophysical, and optoelectronic properties of tin‐based perovskite compounds in their multiple forms from 3D to low‐dimensional structures. At the end, recent progress in tin‐based perovskite solar cells are reviewed, mainly focusing on the detail of the strategies adopted to improve the device performances. For each subtopic, the current challenges and the outlook are discussed, with the aim to stimulate the community to address the most important issues in a concerted manner.

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Mn-doped 2D Sn-based perovskites with energy transfer from self-trapped excitons to dopants for warm white light-emitting diodes

Abstract:
This work shows the competitive relationship between self-trapped exciton (STE) emission from the host crystal and dopant Mn d–d transition emission.

Cited by 26 publications

References 36 publications

Bulk Mn²⁺ Doped 1D Hybrid Lead Halide Perovskite with Highly Efficient, Tunable and Stable Broadband Light Emissions

Bulk Mn²⁺ Doped 1D Hybrid Lead Halide Perovskite with Highly Efficient, Tunable and Stable Broadband Light Emissions

Synthesis of Gram‐Scale Ultrastable Mn‐Doped 2D Perovskites for Light‐Emitting Diodes

Tin Halide Perovskites: From Fundamental Properties to Solar Cells

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Mn-doped 2D Sn-based perovskites with energy transfer from self-trapped excitons to dopants for warm white light-emitting diodes

Abstract: This work shows the competitive relationship between self-trapped exciton (STE) emission from the host crystal and dopant Mn d–d transition emission.

Cited by 26 publications

References 36 publications

Bulk Mn2+ Doped 1D Hybrid Lead Halide Perovskite with Highly Efficient, Tunable and Stable Broadband Light Emissions

Bulk Mn2+ Doped 1D Hybrid Lead Halide Perovskite with Highly Efficient, Tunable and Stable Broadband Light Emissions

Synthesis of Gram‐Scale Ultrastable Mn‐Doped 2D Perovskites for Light‐Emitting Diodes

Tin Halide Perovskites: From Fundamental Properties to Solar Cells

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Product

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Abstract:
This work shows the competitive relationship between self-trapped exciton (STE) emission from the host crystal and dopant Mn d–d transition emission.

Bulk Mn²⁺ Doped 1D Hybrid Lead Halide Perovskite with Highly Efficient, Tunable and Stable Broadband Light Emissions

Bulk Mn²⁺ Doped 1D Hybrid Lead Halide Perovskite with Highly Efficient, Tunable and Stable Broadband Light Emissions