White-light defect emission and enhanced photoluminescence efficiency in a 0D indium-based metal halide

Ran, Qidi; Zhang, Yan; Yang, Jun; He, Rongxing; Zhou, Lei; Hu, Shanshan

doi:10.1039/d1tc05140g

Cited by 39 publications

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“…The obtained results on the MA–In–Br system are discussed together with strategies for further novel material discovery and solution chemistry work in other homometallic and heterometallic halide systems. Note that several new indium(III) halides have recently been reported as efficient optical materials; − thus, this study further expands the indium halide family for luminescence applications.…”

Section: Introductionmentioning

confidence: 77%

“…Plots of the diffuse reflectance data against photon energy gives estimated band gap energy values of 3.77, 3.54, and 3.69 eV for MAInBr 4 , MA 2 InBr 5 , and MA 4 InBr 7 , respectively. In literature, all-inorganic and hybrid organic–inorganic indium halides have been studied as prospective high-efficiency light emitters, − however, MAInBr 4 , MA 2 InBr 5 , and MA 4 InBr 7 exhibit very weak, essentially quenched photoluminescence (PL), spectra.…”

Section: Resultsmentioning

confidence: 99%

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Investigation of the Solution Chemistry of Hybrid Organic–Inorganic Indium Halides for New Material Discovery

et al. 2022

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Recently, metal halide perovskites (MHPs) have emerged as a new class of materials for optical and electronic applications such as solar cells and ionizing radiation detectors. Although the solution-processability of MHPs is among their greatest advantages, the solution chemistries of most metal halide systems and their relationship with the observed structural and chemical diversity are poorly understood. In this work, we study the solution chemistry of a model indium halide system, methylammonium (MA)−In−Br, using a combination of the UV−vis spectroscopy, electrospray ionization mass spectrometry (ESI-MS) measurements, small-angle X-ray scattering (SAXS), and density functional theory (DFT) calculations. Our results show that indium could form either octahedral [InBr 6 3− ] or tetrahedral [InBr 4 − ] anions in solution or a combination of both, depending on the loading ratios of MABr and InBr 3 reactants. Understanding the solution chemistry of this system and recognizing the optical fingerprints of these polyanions allow for targeted crystallization of two novel compounds: MAInBr 4 featuring tetrahedral [InBr 4 − ] anions and MA 2 InBr 5 containing both octahedral [InBr 6 3− ] and tetrahedral [InBr 4 − ] anions. Further increase of the MABr content leads to the formation of previously reported MA 4 InBr 7 , containing only octahedral [InBr 63− ] anions separated by Br − anions. Our results suggest that understanding the solution chemistry of multinary metal halide systems could be a valuable tool for discovering functional materials for practical applications.

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Section: Introductionmentioning

confidence: 77%

Section: Resultsmentioning

confidence: 99%

Investigation of the Solution Chemistry of Hybrid Organic–Inorganic Indium Halides for New Material Discovery

et al. 2022

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“… Under 375 nm excitation at 80 K, the lifetimes of (C 9 H 8 N) 2 SnCl 6 SCs exhibit little to no change upon variation of the detection wavelength, implying that the blue emission is of uniform origin (Figure d). In general, the fast lifetime may also be related to defects . Clearly, the PL intensity of (C 9 H 8 N) 2 SnCl 6 is linearly related to the excitation power, which rules out the emission of (C 9 H 8 N) 2 SnCl 6 from permanent defects (Figure S10).…”

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confidence: 93%

Boosting Blue Emission of Organic Cations in a Sn(IV)-Based Perovskite by Constructing Intermolecular Interactions

Zhou

Chen

et al. 2022

J. Phys. Chem. Lett.

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Improving the photoluminescence (PL) efficiency of organic luminescent molecules is still a great challenge. Herein, a novel zero-dimensional Sn(IV)-based halide (C9H8N)2SnCl6 is prepared by assembling inactive quinoline cations and stable [SnCl6]2– polyhedra. Experimental characterizations and theoretical calculations show that the blue emission of (C9H8N)2SnCl6 centered at 433 nm is derived from the organic cations. Surprisingly, the PL efficiency of the as-prepared halide is nearly 50 times higher than that of the organic precursor and exhibits ultrahigh stability. Structural analysis shows that the introduction of inorganic clusters regulates the stacking mode of organic components and forms hydrogen bonds. This strong intermolecular interaction enhances the structural rigidity of (C9H8N)2SnCl6, inhibits concentration quenching and vibrational dissipation, and thus significantly improves the PL efficiency and stability of the organic cations. This work provides an important way to improve the PL performance and stability of organic species by constructing efficient intermolecular interactions.

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“…Lead-free indium-based metal halide materials have attracted extensive attention in recent years due to their good stability under environmental conditions and excellent photoelectric properties. [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]56,59 Moreover, the diversity of organic cations provides favourable conditions for the construction of organic-inorganic hybrid metal halide materials. In existing reports, zero-dimensional (0D) InCl 6 (C 4 H 10 SN) 4 ÁCl:Sb 3+ was produced by doping Sb 3+ into InCl 6 (C 4 H 10 SN) 4 ÁCl, which undergoes a significant enhancement of the emission peak at 550 nm (PLQY 90%).…”

Section: Introductionmentioning

confidence: 99%

Lead-free broadband orange-emitting zero-dimensional Sb³⁺-doped indium-based organic–inorganic metal halides

et al. 2022

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White-light defect emission and enhanced photoluminescence efficiency in a 0D indium-based metal halide

Abstract: Low-dimensional ns2-metal halide compounds with confined structure and localized electronic states have received considerable attention for their superior luminescent properties. While the intrigue photophysical dynamics of metal halides without ns2...

Cited by 39 publications

References 87 publications

Investigation of the Solution Chemistry of Hybrid Organic–Inorganic Indium Halides for New Material Discovery

Investigation of the Solution Chemistry of Hybrid Organic–Inorganic Indium Halides for New Material Discovery

Boosting Blue Emission of Organic Cations in a Sn(IV)-Based Perovskite by Constructing Intermolecular Interactions

Lead-free broadband orange-emitting zero-dimensional Sb³⁺-doped indium-based organic–inorganic metal halides

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White-light defect emission and enhanced photoluminescence efficiency in a 0D indium-based metal halide

Abstract: Low-dimensional ns2-metal halide compounds with confined structure and localized electronic states have received considerable attention for their superior luminescent properties. While the intrigue photophysical dynamics of metal halides without ns2...

Cited by 39 publications

References 87 publications

Investigation of the Solution Chemistry of Hybrid Organic–Inorganic Indium Halides for New Material Discovery

Investigation of the Solution Chemistry of Hybrid Organic–Inorganic Indium Halides for New Material Discovery

Boosting Blue Emission of Organic Cations in a Sn(IV)-Based Perovskite by Constructing Intermolecular Interactions

Lead-free broadband orange-emitting zero-dimensional Sb3+-doped indium-based organic–inorganic metal halides

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Product

Resources

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Lead-free broadband orange-emitting zero-dimensional Sb³⁺-doped indium-based organic–inorganic metal halides