Boosting the Self-Trapped Exciton Emission in Cs<sub>2</sub>NaYCl<sub>6</sub> Double Perovskite Single Crystals and Nanocrystals

Wang, Zhongyi; Zhang, Ruiling; Zheng, Daoyuan; Liu, Siping; Liu, Feng; Han, Keli; Yang, Bin

doi:10.1021/acs.jpclett.2c02351

Cited by 35 publications

(26 citation statements)

References 43 publications

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“…Especially note that Sb 3+ doped Cs 2 KInCl 6 becomes an indirect band gap with a value of 2.07 eV, but has little effect on the radiative recombination of STEs, that is because STEs recombination is not at Γ point. 15 Upon Sb 3+ doped, a new band shows up in HOMO (Figure 3c), which is mostly dominated by Cl-p and Sb-s characters (Figure 3d). However, the LUMO is hardly affected by Sb 3+ due to the Sb-p state is much higher than the In-d state.…”

Section: Resultsmentioning

confidence: 99%

“…For pure Cs 2 KInCl 6 , it exhibits a negligible emission under ultraviolet (UV) excitation due to the parity‐forbidden transition rule (Figure S2, Supporting Information). [ 15 ] For comparison, 0.5%Sb 3+ doped Cs 2 KInCl 6 shines bright cyan light emission peaking at 495 nm. Moreover, this compound also possesses a full width at half maxima (FWHM) of 98 nm and a PLQY of 95% (Figures S3 and S4, Supporting Information), which can be attributed to STEs emission in this compound due to strong Jahn‐Teller lattice distortion and spin‐orbit interaction of [SbCl 6 ] 3‐ clusters.…”

Section: Resultsmentioning

confidence: 99%

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Tunable Efficient White Emission in Holmium Doped Double Perovskites Cs₂KInCl₆ via Antimony Sensitization

Huang

Peng

Wei

et al. 2023

Advanced Optical Materials

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lead-free double perovskites of Cs 2 M(I) M(III)X 6 have drawn extensive attention and are seen as a promising alternative for LHPs. [3] The double perovskites are characterized by a 3D framework of alternating and corner-shared M(I)X 6 and M(III)X 6 octahedra. Particularly, although a great variety of double perovskites have been reported, only a few of them, such as Cs 2 NaInCl 6 , Cs 2 KInCl 6 , Cs 2 AgSbCl 6 , and Cs 2 AgBiBr 6 , have fascinating photoelectric characteristics. [4] Nevertheless, the double perovskites generally exhibit an unsatisfying photoluminescence efficiency, which is caused by their indirect bandgap characteristics or parity-forbidden transition in the direct bandgap system. [5] Hence, it is a great challenge to obtain double perovskites with highly efficient emission.Metal ion doping has been demonstrated to be a robust strategy to regulate the optical properties of LHPs, and has also achieved impressive results in double perovskites. For example, Sb 3+ doped Cs 2 NaInCl 6 shows a blue emission with a PLQY of 75.89%, [6] Sb 3+ doped Cs 2 KInCl 6 emits a cyan emission with a PLQY of 99.2%, [7] Bi 3+ doped Cs 2 (Ag 0.6 Na 0.4 )InCl 6 shines white emission with a PLQY of 86%, [8] Mn 2+ doped Cs 2 Na 0.2 Ag 0.8 InCl 6 shows a red emission with a PLQY of 32%. [9] Although single-doping technology of double perovskites can achieve efficient emission in the visible light range and has made significant progress in solid-state lighting (SSL), its further development is undoubtedly limited by its un-tunable emission and single scope of application. Recent works have suggested that co-doping strategy can provide multiple emission centers in a single compound, which endows double perovskites to have abundant optical properties, and can further develop its applications in multifunctional materials. For instance, Bi 3+ /Sb 3+ co-doped Cs 2 Ag 0.1 Na 0.9 InCl 6 exhibits a distinct excitation-wavelength dependent emission characteristic, which makes it show great potential in optical anti-counterfeiting. [10] More particularly, ns 2 metal ions (M 3+ = Bi 3+ and Sb 3+ ) can work as a sensitizer of Ln 3+ (Ln = Yb, Er, Nd), and construct an appropriate energy-transfer channel from ns 2 electrons to Ln 3+ , thus ultimately boosting the nearinfrared emission (NIR) of Ln 3+ . [11] Typical examples are that the NIR emission intensity of Bi 3+ /Er 3+ and Bi 3+ /Yb 3+ co-doped Cs 2 AgInCl 6 is about 45 and 27 times higher than that of single Recently, ns 2 metal ions (such as Bi 3+ and Sb 3+ ) doped double perovskites have captured intense attention for their efficient emission, however, achieving efficient and tunable white light emission is always an enormous challenge. Herein, Sb 3+ /Ho 3+ co-doped Cs 2 KInCl 6 double perovskites are proposed, and the photoluminescence results show that there are two emission bands, one broad cyan emission band stems from self-trapped exciton (STE) in [SbCl 6 ] 3octahedron, while another red emission band derives from the f-f transitions of Ho 3+ . The emission processes ...

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Tunable Efficient White Emission in Holmium Doped Double Perovskites Cs₂KInCl₆ via Antimony Sensitization

Huang

Peng

Wei

et al. 2023

Advanced Optical Materials

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“…Such a combination should strongly accelerate the search for new phosphors, which is currently performed by an Edisonian approach. Nevertheless, we want to highlight the successes of the Edisonian approach as well, evidenced by several new doped LFP emitters reported during the time the present Minireview was peer‐reviewed, in particular, those based on Cs(Rb) 3 Cd 2 Cl 7 ,[ 48 , 49 ] Cs 2 NaYCl 6 , [50] and Cs 2 AgScCl 6 [51] as host matrices.…”

Section: Discussionmentioning

confidence: 99%

Doping/Alloying Pathways to Lead‐Free Halide Perovskites with Ultimate Photoluminescence Quantum Yields

et al. 2022

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Tailored modifications of halide lead-free perovskites (LFPs) via doping/alloying with metal cations have been recognized as a promising pathway to highly efficient inorganic phosphors with photoluminescence (PL) quantum yields of up to 100 %. Such materials typically display selective sensitivity to UV light, a broad PL range, and long PL lifetimes as well as a unique compositional variability and stability-an ideal combination for many light-harvesting applications. This Minireview presents the state-of-the-art in doped LFPs, focusing on the reports published mostly in the last two to three years. We discuss the factors determining the efficiency and spectral parameters of the broadband PL of doped LFPs depending on the dopant and host matrix, both in micro-and nanocrystalline states, address the most relevant challenges this rapidly developing research area is facing, and outline the most promising concepts for further progress in this field.

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“…Eine solche Kombination dürfte die Suche nach neuen Leuchtstoffen, die derzeit mit einem Edison-Ansatz durchgeführt wird, erheblich beschleunigen. Nichtsdestotrotz möchten wir auch die Erfolge des Edison-Ansatzes hervorheben, die sich in mehreren neuen dotierten BHP-Emittern zeigen, über die zum Zeitpunkt der Begutachtung dieses Kurzaufsatzes berichtet wurde, insbesondere diejenigen, die auf Cs(Rb) 3 Cd 2 Cl 7 -, [48,49] Cs 2 NaYCl 6 - [50] und Cs 2 AgScCl 6 -Wirtsmatrizen [51] basieren.…”

Section: Csmncl 3 -Matrixunclassified

Dotierungs‐/Legierungswege zu bleifreien Halogenid‐Perowskiten mit ultimativen Photolumineszenz‐Quantenausbeuten

et al. 2022

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Maßgeschneiderte Modifizierungen bleifreier Halogenid-Perowskite (BHP) durch Dotierung/Legierung mit Metallkationen gelten als vielversprechender Weg zu hocheffizienten anorganischen Leuchtstoffen mit Photolumineszenz (PL)-Quantenausbeuten von bis zu 100 %. Solche Materialien weisen typischerweise eine selektive Empfindlichkeit gegen UV-Licht, einen breiten PL-Bereich, lange PL-Lebensdauern und eine einzigartige Variabilität und Stabilität der Zusammensetzung auf -eine ideale Kombination für viele Lichtsammelanwendungen. Dieser Kurzaufsatz stellt den Stand der Technik bei dotierten BHPs vor, mit dem Schwerpunkt auf Berichten aus den letzten 2-3 Jahren. Wir diskutieren die Faktoren, die die Effizienz und die spektralen Parameter der Breitband-PL von dotierten BHP abhängig von Dotierstoff und Wirtsmatrix im mikro-wie auch im nanokristallinen Zustand bestimmen, gehen auf die wichtigsten Herausforderungen in diesem sich rasch entwickelnden Forschungsbereich ein und skizzieren die vielversprechendsten Konzepte, um weitere Fortschritte in diesem Bereich zu erzielen.

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Boosting the Self-Trapped Exciton Emission in Cs₂NaYCl₆ Double Perovskite Single Crystals and Nanocrystals

Cited by 35 publications

References 43 publications

Tunable Efficient White Emission in Holmium Doped Double Perovskites Cs₂KInCl₆ via Antimony Sensitization

Tunable Efficient White Emission in Holmium Doped Double Perovskites Cs₂KInCl₆ via Antimony Sensitization

Doping/Alloying Pathways to Lead‐Free Halide Perovskites with Ultimate Photoluminescence Quantum Yields

Dotierungs‐/Legierungswege zu bleifreien Halogenid‐Perowskiten mit ultimativen Photolumineszenz‐Quantenausbeuten

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Boosting the Self-Trapped Exciton Emission in Cs2NaYCl6 Double Perovskite Single Crystals and Nanocrystals

Cited by 35 publications

References 43 publications

Tunable Efficient White Emission in Holmium Doped Double Perovskites Cs2KInCl6 via Antimony Sensitization

Tunable Efficient White Emission in Holmium Doped Double Perovskites Cs2KInCl6 via Antimony Sensitization

Doping/Alloying Pathways to Lead‐Free Halide Perovskites with Ultimate Photoluminescence Quantum Yields

Dotierungs‐/Legierungswege zu bleifreien Halogenid‐Perowskiten mit ultimativen Photolumineszenz‐Quantenausbeuten

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Boosting the Self-Trapped Exciton Emission in Cs₂NaYCl₆ Double Perovskite Single Crystals and Nanocrystals

Tunable Efficient White Emission in Holmium Doped Double Perovskites Cs₂KInCl₆ via Antimony Sensitization

Tunable Efficient White Emission in Holmium Doped Double Perovskites Cs₂KInCl₆ via Antimony Sensitization