DALTON TRANSACTIONS
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2021
·Vol. 50
·期 32
·11221-11227
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IF 4.39
Xiaoling Xie,Jing Wan,Haiqi Pu,Xi Zhang,Song Qing,Qiang Zhou,Lingxiang Chu,Tao Yang,Yayun Zhou,Zhengliang Wang
In this work, we present a brand-new narrowband red-emitting fluoroperovskite via the introduction of Mn4+ into NaZnF3 through a facile co-precipitation method at room temperature. The physicochemical properties of the fluoroperovskite such as crystal and electronic structures, morphology, and elemental composition, as well as its spectroscopic properties such as luminescence behaviours and optical performance were characterized and investigated in detail. Evidence shows that NaZnF3:Mn4+ exhibits a uniform particulate shape with single-phase crystallinity. By virtue of the non-equivalent substitution and the [MnF6] octahedral distortion in the fluoride host, sharp red emissions of phonon sidebands and the zero-phonon line upon blue light excitation are identified. Benefiting from the unique spectral feature, a wide colour gamut of 104.1% NTSC is achieved by coating β-SiAlON:Eu2+ and NaZnF3:Mn4+ on an InGaN chip, indicating the potential use of the Mn4+ fluoroperovskite as a colour converter for display backlight application.
研究领域:
材料科学
·
光学工程
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DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Meiqing Yan,Jiapeng Yang,Enrou Mei,Ye He,Zhaoping Chen,Weiwei Huan,Xiaojuan Liang,Weidong Xiang
To address the issues of Pb toxicity and stability in traditional lead halide perovskite materials, this study presented an environmentally benign aqueous-phase synthesis method for the fabrication of a series of high-performance, green-emitting, lead-free organic–inorganic hybrid manganese(II) halide (OIMnHs) materials, (C12H28N)2Mn(1–x)ZnxBr4. Through Zn2+ doping, the optical properties and stability of the materials were significantly enhanced. Notably, (C12H28N)2Mn0.95Zn0.05Br4 exhibited a remarkable photoluminescence quantum yield (PLQY) of 97.2% and narrow-band green emission at 520 nm with a full width at half-maximum (fwhm) of 43 nm. Furthermore, (C12H28N)2Mn0.95Zn0.05Br4@PET composite films, fabricated via a double-layered PET film encapsulation technique, demonstrated exceptional environmental stability, including resistance to air, heat, water, and blue light. Finally, by integrating (C12H28N)2Mn0.95Zn0.05Br4 with commercial K2SiF6:Mn4+ red phosphor, a composite light conversion film was developed, achieving an impressive wide color gamut coverage of 116.73% NTSC 1953 and 86.82% Rec. 2020. Importantly, the aqueous-phase method exhibited excellent scalability, as demonstrated by a successful 20-fold scale-up production without compromising the optical properties or crystal structure of the materials, highlighting its potential for large-scale manufacturing. This study paved the way for the development of high-performance, environmentally friendly, low-cost, and readily scalable lead-free halide materials for wide-color-gamut backlight displays.
研究领域:
材料科学
·
光学
·
环境科学
·
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高影响因子
Small
·
2025
·
IF 12.1
Cheng-Xun Guo,Jing-Hua Chen,Zi-Lin He,Jun-Hua Wei,Dai-Bin Kuang
Methylammonium lead bromide perovskite (MAPbBr 3 ) quantum dots (QDs) have emerged as promising candidates for next-generation optoelectronic applications owing to their exceptional photoluminescent properties. However, their practical applications face significant challenges due to inherent instability issues. Herein, a solvent-induced in situ crystallization method is presented to encapsulate MAPbBr 3 QDs within a crosslinked (cl-) polymethyl methacrylate (PMMA) network. This innovative approach eliminates environmental concerns associated with traditional solvent evaporation methods while enabling uniform dispersion and stabilization of perovskite QDs within the crosslinked polymer matrix. The effects of preparation conditions are systematically investigated on the optical performance of the composite materials. Notably, UV irradiation is found to significantly enhance the luminescent performance. The optimized MAPbBr 3 @cl-PMMA exhibits outstanding optoelectronic performance, featuring a narrow emission profile (full width at half maximum: 24.6 nm), high optical transmittance (91%), and an impressive photoluminescence quantum yield of 98.3%. Benefiting from the protective crosslinked polymer matrix, the composite demonstrates exceptional stability. Furthermore, by integrating MAPbBr 3 @cl-PMMA film with commercial K 2 SiF 6 :Mn 4+ (KSF) red phosphor, a liquid crystal display (LCD) backlight device achieving a wide color gamut of 122.7% National Television System Committee (NTSC) 1953 standard is fabricated. This environmentally friendly and scalable synthesis method offers a promising pathway for large-area manufacturing and practical optoelectronic applications.
研究领域:
材料科学
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光学工程
·
高分子化学
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纳米技术
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光电子学
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PubMed
高影响因子
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