Organic-inorganic hybrid manganese bromine single crystal with dual-band photoluminescence from polaronic and bipolaronic excitons

Peng, Hui; Huang, Tao; Zou, B. S.; Tian, Yan; Wang, Xinxin; Guo, Yongchang; Dong, Ting; Yu, Zilin; Ding, Chunjie; Yang, Fan; Wang, Jianping

doi:10.1016/j.nanoen.2021.106166

Cited by 94 publications

(104 citation statements)

References 48 publications

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“…In general, weaker spin–spin coupling leads to a broader and weaker EPR signal; thus, the magnetic exchange interaction between Mn 2+ ions seems to be weakened by Pb 2+ incorporation. The EPR spectra are consistent with the magnetic hysteresis loops (Figure S2), both of which indicate weaker Mn–Mn interaction in the Pb 2+ -incorporated sample. , …”

supporting

confidence: 80%

“…The EPR spectra are consistent with the magnetic hysteresis loops (Figure S2), both of which indicate weaker Mn−Mn interaction in the Pb 2+ -incorporated sample. 19,41 Figure 2 shows TEM and HRTEM images of the pristine and Pb 2+ -incorporated PA NCs. Both are most spherical with an average diameter of 50.0 ± 4.4 nm and 7.0 ± 1.0 nm for the pristine and Pb 2+ -incorporated PA NCs, respectively.…”

Section: T H Imentioning

confidence: 99%

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Enhanced Photoluminescence of All-Inorganic Manganese Halide Perovskite-Analogue Nanocrystals by Lead Ion Incorporation

Meng

Zhou

Pang

et al. 2021

J. Phys. Chem. Lett.

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Herein, we develop an effective approach for incorporating lead (Pb) ions into manganese (Mn) halide perovskite-analogue nanocrystals (PA NCs) of CsMn(Cl/Br)3·2H2O via room-temperature supersaturation recrystallization. Pb2+-incorporated Mn-PA NCs exhibit strong orange emission upon UV light illumination, a peak centered at 600 nm assigned to Mn2+ transition (4T1g → 6A1g) with a photoluminescence quantum yield (PLQY) of 41.8% compared to the pristine Mn-PA NCs with very weak PL (PLQY = 0.10%). The significant enhancement of PLQY is attributed to the formation of [Mn(Cl/Br)4(OH)2]4––[Pb(Cl/Br)4(OH)2]4––[Mn(Cl/Br)4(OH)2]4– chain network structure, in which Pb2+ effectively dilutes the Mn2+ concentration to reduce magnetic coupling between Mn2+ pairs to relax the spin and parity selection rules. In addition, excited energy can effectively transfer from the [Pb(Cl/Br)4(OH)2]4– unit to Mn2+ luminescence centers owing to the low activation energy. Pb2+-incorporated PA NCs also exhibit excellent stability. The combined strong PL and high stability make Pb2+-incorporated Mn-based PA NCs an excellent candidate for potential optronic applications.

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supporting

confidence: 80%

Section: T H Imentioning

confidence: 99%

Enhanced Photoluminescence of All-Inorganic Manganese Halide Perovskite-Analogue Nanocrystals by Lead Ion Incorporation

Meng

Zhou

Pang

et al. 2021

J. Phys. Chem. Lett.

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“…However, as the temperature continues rising, the PL intensity becomes weaker, which can be attributed to the effect of thermal quenching. [ 32,33 ] The thermal activation energy of SnP 2 S 6 is deduced to be 148 meV according to the Arrhenius equation as follows: [ 31 ]

\begin{array}{*{20}{c}}{I\left( T \right) = \frac{{{I_0}}}{{1 + A{e^{ - {E_{\rm{a}}}/{k_{\rm{B}}}T}}}}}\end{array}

where I 0 , T , k B, and E a refer to PL intensity at 0 K, temperature, Boltzmann constant, and thermal activation energy, respectively. Such a large E a in the SnP 2 S 6 can be explained for the efficient STEs emission at ambient temperature.…”

Section: Resultsmentioning

confidence: 99%

Self‐Trapped Excitons in 2D SnP₂S₆ Crystal with Intrinsic Structural Distortion

Zhang

Wang

Feng

et al. 2022

Adv Funct Materials

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Exploring and utilizing novel materials with self‐trapped excitons (STEs) is highly desired due to their unique physical properties and multiple optoelectronic applications. Here, a 2D SnP2S6 crystal is reported with obvious STEs emission caused by distorted [SnS6]8‐ and [P2S6]4‐ octahedral units and strong electron‐phonon coupling. The STEs feature wide photoluminescence (PL) spectra range from 600 to 850 nm and a large Stokes redshift of ≈0.6 eV. Carrier dynamics measurements including temperature‐dependent PL and transient absorption reveal a large Huang–Rhys factor of ≈18.3 and a self‐trapping process of ≈101–103 ps in the 2D SnP2S6 crystal. Such self‐trapped states enable 2D SnP2S6 crystal a wide spectral response range and excellent photodetection performance. As a result, high responsivity (22.8 A W‐1) and detectivity (3.98 × 1010 Jones) are achieved under 365 nm light illumination. These results provide a deep insight into the photophysical process of STEs, which lays the foundation for developing novel STEs‐based materials and optoelectronic devices.

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“…As shown in Figure S3, the initial decomposition temperature of the compound was 247 °C , which may be caused by the organic components in this material. In addition, the second decomposition temperature of (TPA)2PbBr4 is 550 °C , which may be related to the evaporation of inorganic components in this compound [22]. Figure 2a shows the optical images of (TPA)2PbBr4 SCs, which is colorless in sunlight and shows blue emission under a 365 nm UV lamp.…”

Section: Resultsmentioning

confidence: 99%

A Zero-Dimensional Organic Lead Bromide of (TPA)2PbBr4 Single Crystal with Bright Blue Emission

et al. 2022

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Blue-luminescence materials are needed in urgency. Recently, zero-dimensional (0D) organic metal halides have attractive much attention due to unique structure and excellent optical properties. However, realizing blue emission with near-UV-visible light excitation in 0D organic metal halides is still a great challenge due to their generally large Stokes shifts. Here, we reported a new (0D) organic metal halides (TPA)2PbBr4 single crystal (TPA+ = tetrapropylammonium cation), in which the isolated [PbBr4]2− tetrahedral clusters are surrounded by organic ligand of TPA+, forming a 0D framework. Upon photoexcitation, (TPA)2PbBr4 exhibits a blue emission peaking at 437 nm with a full width at half-maximum (FWHM) of 50 nm and a relatively small Stokes shift of 53 nm. Combined with density functional theory (DFT) calculations and spectral analysis, it is found that the observed blue emission in (TPA)2PbBr4 comes from the combination of free excitons (FEs) and self-trapped exciton (STE), and a small Stokes shift of this compound are caused by the small structure distortion of [PbBr4]2− cluster in the excited state confined by TPA molecules, in which the multi-phonon effect take action. Our results not only clarify the important role of excited state structure distortion in regulating the STEs formation and emission, but also focus on 0D metal halides with bright blue emission under the near-UV-visible light excitation.

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Organic-inorganic hybrid manganese bromine single crystal with dual-band photoluminescence from polaronic and bipolaronic excitons

Cited by 94 publications

References 48 publications

Enhanced Photoluminescence of All-Inorganic Manganese Halide Perovskite-Analogue Nanocrystals by Lead Ion Incorporation

Enhanced Photoluminescence of All-Inorganic Manganese Halide Perovskite-Analogue Nanocrystals by Lead Ion Incorporation

Self‐Trapped Excitons in 2D SnP₂S₆ Crystal with Intrinsic Structural Distortion

A Zero-Dimensional Organic Lead Bromide of (TPA)2PbBr4 Single Crystal with Bright Blue Emission

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Organic-inorganic hybrid manganese bromine single crystal with dual-band photoluminescence from polaronic and bipolaronic excitons

Cited by 94 publications

References 48 publications

Enhanced Photoluminescence of All-Inorganic Manganese Halide Perovskite-Analogue Nanocrystals by Lead Ion Incorporation

Enhanced Photoluminescence of All-Inorganic Manganese Halide Perovskite-Analogue Nanocrystals by Lead Ion Incorporation

Self‐Trapped Excitons in 2D SnP2S6 Crystal with Intrinsic Structural Distortion

A Zero-Dimensional Organic Lead Bromide of (TPA)2PbBr4 Single Crystal with Bright Blue Emission

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Self‐Trapped Excitons in 2D SnP₂S₆ Crystal with Intrinsic Structural Distortion