Nanomaterials
·
2023
·Vol. 13
·期 15
·2259
·
IF 5.3
Haixia Wu,Zhenxu Lin,Jie Song,Yi Zhang,Yanqing Guo,Wenxing Zhang,Rui Huang
Zero-dimensional (0D) tin halide perovskites feature extraordinary properties, such as broadband emission, high photoluminescence quantum yield, and self-absorption-free characteristics. The innovation of synthesis approaches for high-quality 0D tin halide perovskites has facilitated the flourishing development of perovskite-based optoelectronic devices in recent years. However, discovering an effective strategy to further enhance their emission efficiency remains a considerable challenge. Herein, we report a unique strategy employing rapid heat treatment to attain efficient self-trapped exciton (STE) emission in Cs4SnBr6zero-dimensional perovskite. Compared to the pristine Cs4SnBr6, rapid thermal treatment (RTT) at 200 °C for a duration of 120 s results in an augmented STE emission with the photoluminescence (PL) quantum yield rising from an initial 50.1% to a substantial 64.7%. Temperature-dependent PL spectra analysis, Raman spectra, and PL decay traces reveal that the PL improvement is attributed to the appropriate electron–phonon coupling as well as the increased binding energies of STEs induced by the RTT. Our findings open up a new avenue for efficient luminescent 0D tin-halide perovskites toward the development of efficient optoelectronic devices based on 0D perovskites.Keywords:photoluminescence;self-trapped exciton;Cs4SnBr6;rapid thermal treatment
研究领域:
材料科学
·
光电学
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Coatings
·
2024
·Vol. 14
·期 8
·945
·
IF 2.9
Xinye Lu,Haixia Wu,Jisheng Xu,Jianni Chen,Yaqian Huang,Hongliang Li,Jie Song,Rui Huang
Zero-dimensional tin-based halide perovskites have garnered considerable interest owing to their remarkable optical properties, including broad-band emission, high photoluminescence (PL) efficiency, and low self-absorption. Nevertheless, enhancing the PL efficiency and stability of these materials remains a pressing challenge. In this study, the enhancement of PL and stability in Cs4SnBr6zero-dimensional perovskite was investigated through Ce3+doping. Our experimental results demonstrate that the incorporation of Ce3+can significantly boost the light emission intensity from self-trapped excitons (STEs) in Cs4SnBr6, achieving over a 150% increase compared to the undoped sample, with a PL quantum yield of approximately 64.7%. Moreover, the thermal stability of the corresponding doped sample is markedly enhanced. Through comprehensive analyses, including X-ray diffraction, energy-dispersive spectroscopy, time-resolved PL, and temperature-dependent PL measurements, we elucidate that the enhanced light emission is attributed to the distortion of the [SnBr6]4−octahedral structure induced by Ce3+doping, which strengthens electron–phonon coupling and elevates the binding energy of STEs.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 23
·5324
·
IF 3.2
Haixia Wu,Wendi Zhou,Rui Huang,Jie Song,Zhenxu Lin,Yi Zhang,Tianpei Qiu,Hongliang Li
Zero-dimensional (0D) tin halide perovskites have emerged as promising luminescent materials owing to their broadband emission, high quantum yield, and negligible self-absorption. Yet, their luminescence efficiency and stability remain insufficient for practical optoelectronic applications. Here, Sb3+dopants are introduced into Cs4SnBr6through a water-assisted wet ball milling strategy, resulting in bright and thermally robust emission. The doped materials exhibit pronounced self-trapped exciton (STE) luminescence centered at 525 nm with a broad full width at half maximum of 110 nm, a large Stokes shift of approximately ~1.3 eV, and a photoluminescence lifetime of ~0.8 µs. Remarkably, Sb3+incorporation boosts the photoluminescence quantum yield (PLQY) up to 64% at room temperature while simultaneously improving thermal stability. Correlated spectroscopic analyses reveal that the Sb3+-induced lattice distortion of the [SnBr6]4−octahedra strengthens electron–phonon interactions and elevates the STE binding energy, thereby stabilizing the excited states and suppressing nonradiative losses.
研究领域:
材料科学
·
光电子学
·
钙钛矿发光材料
·
固态物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2023
·Vol. 16
·期 18
·6309
·
IF 3.4
Jianni Chen,Haixia Wu,Yaqian Huang,Jisheng Xu,Xinye Lu,Wendi Zhou,Jie Song,Rui Huang
Zero-dimensional (0D) tin halide perovskites, characterized by their broadband and adjustable emissions, high photoluminescence quantum yield, and absence of self-absorption, are crucial for the fabrication of high-efficiency optoelectronic devices, such as LEDs, solar cells, and sensors. Despite these attributes, boosting their emission efficiency and stability poses a significant challenge. In this work, Cr3+-doped Cs4SnBr6−xFxperovskites were synthesized using a water-assisted wet ball-milling method. The effect of CrF3addition on photoluminescence properties of Cs4SnBr6−xFxPerovskites was investigated. We found that Cr3+-doped Cs4SnBr6−xFxPerovskites exhibit a broad emission band, a substantial Stokes shift, and an efficient green light emission centered at about 525 nm at ambient temperature. The derived photoluminescence quantum yield amounted to as high as 56.3%. In addition, these Cr3+-doped Cs4SnBr6−xFxperovskites outperform their undoped counterparts in terms of thermal stability. Through a comprehensive analysis of photoluminescence measurements, our findings suggested that the elevated photoluminescence quantum yield can be attributed to the enhanced exciton binding energy of self-trapped excitons (STEs) and the suitable electron−phonon coupling resulting from the substantial distortion of [SnBr6]4−octahedra instigated by the addition of CrF3.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
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