Yb2+-Alloyed Cs4PbI6–CsPbI3 Perovskite Nanocomposites for Efficient and Stable Pure-Red Emission

Dai, Zhenwen; Chen, Junsheng; Yang, Bin

doi:10.1021/acs.jpclett.1c02798

Cited by 20 publications

(18 citation statements)

References 44 publications

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“…Similar behaviour was also identified for the PL quantum yield (PLQY), with the highest PLQY of 81.3% for (CsPbI3)0.05(agZIF-62)0.95 at 275 ℃ sintering (Figure S7). This value is greater than the majority of previously reported CsPbI3 [26][27][28][29][30] . With increased CsPbI3 loading, the PL peak red-shifted first and then blue-shifted (Figure S8), which was paralleled by similar changes in the γ-phase absorption edge shown in the UV-Vis absorption spectra (Figure S9).…”

Section: Stable Optical Performancecontrasting

confidence: 59%

Interfacial alloying between lead halide perovskite crystals and hybrid glasses

Hou

Huang

et al. 2023

Preprint

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The stellar optoelectronic properties of metal halide perovskites provide enormous promise for next-generation optical devices with excellent conversion efficiencies and lower manufacturing costs. However, there is a long-standing ambiguity as to whether the perovskite surface/interface (e.g. structure, charge transfer or source of off-target recombination) or bulk properties are the more determining factor in device performance. We fabricated an array of CsPbI3 crystal and hybrid glass composites by sintering and globally visualised the property-performance landscape. Our findings reveal that the interface is the primary determinant of the crystal phases, optoelectronic quality, and stability of CsPbI3. In particular, the presence of a diffusion "alloying" layer is discovered to be critical for passivating surface traps, and beneficially altering the energy landscape of crystal phases. However, high-temperature sintering results in the promotion of a non-stoichiometric perovskite and excess traps at the interface, despite the short-range structure of halide is retained within the alloying layer. By shedding light on functional hetero-interfaces, our research offers the key factors for engineering high-performance perovskite devices.

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Section: Stable Optical Performancecontrasting

confidence: 59%

Interfacial alloying between lead halide perovskite crystals and hybrid glasses

Hou

Huang

et al. 2023

Preprint

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“…In recent years, the interesting photoelectric properties of the three-dimensional (3D) APbX 3 lead halide perovskite (LHP) materials (X = Cl, Br, I) have aroused great research interest. − Excellent carrier mobility and low defect characteristics make it considered as a new type of renewable energy. − It has important application value in high efficiency solar cells, LEDs, lasers, and photodetectors. − …”

mentioning

confidence: 99%

“…The alloying of the control material will enrich the various properties of the material and produce very interesting phenomena. At present, the B-site metal elements are generally alloyed and the A-site is rarely alloyed. , Chiral systems play a very important role in nature and have important applications in circularly polarized light emission and information storage and encryption . However, chiral and achiral cations have not been introduced into the complete perovskite framework.…”

mentioning

confidence: 99%

Efficient Photoluminescence of Manganese-Doped Two-Dimensional Chiral Alloyed Perovskites

Wang

et al. 2021

J. Phys. Chem. Lett.

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In this work, we introduced chiral cations into the achiral two-position layered perovskite system for the first time to form an alloyed system that still retains a clear layered structure. In addition, in order to explore the potential photoelectric properties of the alloyed system, manganese ions were doped into the alloyed system. The XRD pattern shows that the steady-state absorption and emission spectra of the alloyed system have a large structural distance, while the doped manganese system exhibits a two-color photoluminescence phenomenon. In addition, combined with time-resolved fluorescence and testing, the photoluminescence characteristics and ultralong lifetime of Mn-doped samples were further characterized. The exciton band structure of the lead halide perovskite framework can be adjusted through this design strategy. Mn2+ ions can form characteristic energy levels in the host system and then energy transfer of excitons occurs, which is of great significance for the development of new functional and high-efficiency photoluminescent materials.

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“…[25] For research on red-emitting CsPbI 3 and Cs 4 PbI 6 , no issues on energy transfer has ever been mentioned. [26,27] For red-emitting PQDs conversion layers in micro-LED display, the FRET shows a great potential in enhancing the PL sensitivity in spectra region of blue-chip, which otherwise cannot effectively excite the red PQDs.…”

Section: Introductionmentioning

confidence: 99%

Brightened Bicomponent Perovskite Nanocomposite Based on Förster Resonance Energy Transfer for Micro‐LED Displays

et al. 2023

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Lead halide perovskite quantum dots (PQDs) are making their way toward next-generation display applications, such as serving as color conversion layers in micro-light-emitting-diode (micro-LED) arrays. Red PQDs containing iodine exhibit weaker brightness compared with their green counterpart when employed as color conversion layers. Therefore, PQDs with enhanced brightness are highly favorable for micro/mini-LED displays. A universal strategy of bicomponent perovskite nanocomposite (BPNC) with significantly enhanced photoluminescence (PL) intensity is proposed through the built-in Förster resonance energy transfer (FRET) from the core CsPbBr 3 to the shell 𝜸-CsPbI 3 , and it is confirmed that it is through a pair of combined quasi-degenerate energy levels in the blue spectra region that the FRET is conducted, resulting in a high excitation wavelength selectivity. Owing to the highly efficient energy transition route from blue excitation to red emission established by the FRET, the BPNC exhibits the brightest single-peak red photoluminescence with near 100% quantum yield. The BPNC with FRET is further proven to be adaptable to a wide range of emission wavelengths. The BPNCs in a blue micro-LED array are employed as color downconversion layers, and excellent color conversion properties and high color gamut are demonstrated. This strategy of BPNC paves a road to the full-color micro-LED displays.

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Yb²⁺-Alloyed Cs₄PbI₆–CsPbI₃ Perovskite Nanocomposites for Efficient and Stable Pure-Red Emission

Cited by 20 publications

References 44 publications

Interfacial alloying between lead halide perovskite crystals and hybrid glasses

Interfacial alloying between lead halide perovskite crystals and hybrid glasses

Efficient Photoluminescence of Manganese-Doped Two-Dimensional Chiral Alloyed Perovskites

Brightened Bicomponent Perovskite Nanocomposite Based on Förster Resonance Energy Transfer for Micro‐LED Displays

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