JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Meiqing Yan,Jiapeng Yang,Fan Yang,Xiaojuan Liang,Weidong Xiang
As display technologies progress towards enhanced visual performance, there was a growing demand for color conversion materials to meet increasingly stringent performance requirements. In recent years, all-inorganic perovskite CsPbX 3 (X = Cl, Br, I) nanocrystals (NCs) had gained attention in the field of wide color gamut backlight displays due to their tunable full spectrum, narrow-band emission, high color purity, and ease of processing. However, red-emitting perovskite NCs were still facing challenges with photoluminescence quantum yield (PLQY) and stability. In this study, Yb 3+ doped CsPbBr 1 I 2 perovskite nanocrystal glass (Yb 3+ @CsPbBr 1 I 2 PNG) was synthesized using a melt-quenching technique. Samples emitting at a narrow band centered at 630 nm, with a full width at half maximum(FWHM) of 31.8 nm, exhibited a high PLQY of 80.36 % and retained fluorescence intensity at 98.2 % of the initial value in water, maintaining to 92.6 % after continuous blue light irradiation for 60 days. Moreover, the optical conversion film Yb 3+ @CsPbBr 1 I 2 @CsPbBr 3 @PET developed in our study showcased color gamut coverage surpassing 132.9 % of the NTSC 1953 standard and 98.8 % of the Rec.2020 standard. In summary, the highly efficient and remarkably stable red-emitting Yb 3+ @CsPbBr 1 I 2 PNG composite material introduced in this study paved the way for future advancements in wide color gamut and ultra-high definition backlight display technologies.
研究领域:
材料科学
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显示技术
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光学工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
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IF 9.5
Shuang Yang,Yinan Lao,Wenjin Yu,Zhenyu Tang,Haoqing Guo,Ganghong Liu,Bo Qu,Lixin Xiao,Zhijian Chen
Tin-based perovskites comprise one of the preferred nontoxic alternatives to Pb-based perovskites due to their desirable optoelectronic properties. However, there remains a crucial stability problem due to the property of Sn2+ oxidation. In this study, we reported stable tin-based perovskite nanocrystals (NCs) using stannous acetate as the Sn2+ source because of its stronger Sn–O bonding. To prevent the oxidation of Sn2+, a thin layer of CsBr coverage was formed in situ; tin-based perovskite NCs, CsxSnBrx+2@CsBr (1 < x < 4), show a high photoluminescence quantum yield (PLQY) of 78.2% and high stability. The measured lifetime of PLQY decrease to half of the initial value is ∼1287 h under ambient conditions and ∼2200 h under a nitrogen atmosphere, respectively. Furthermore, the as-fabricated light-emitting diodes based on CsxSnBrx+2@CsBr NCs as the emitting layer exhibit a maximum luminescence of 16 cd/m2 and an external quantum efficiency of 0.035% with peaks at 451 and 615 nm, corresponding to the emissions of CsBr and CsxSnBrx+2, respectively. This work provided a new way to obtain stable Sn-based perovskite NCs and exhibited their potential for application in white light-emitting diodes (LEDs).
研究领域:
材料科学
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纳米技术
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光电
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DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 12
·118396
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IF 6.3
Jun Gao,Rui Fang,Mengmeng Li,Zhicai Zhang,Shuyao Li,Yang lv,Zhiqiang Hou,Chao Wang,Yao Tang,Haikuo Wang
YAG:Ce nanophosphors are crucial for advanced micro-optoelectronic devices but are fundamentally constrained by the severe trade-off between size and photoluminescence quantum yield (PLQY). This limitation makes it challenging to prepare high-quality materials that meet both ultra-small size (< 50 nm) and high-PLQY requirements. In this study, YAG:Ce nanophosphors (< 50 nm) exhibiting a high PLQY of 64% were successfully prepared through a co-precipitation method guided by experimental design, representing a significant advance in the field. YAG:Ce nano transparent ceramic (Nano-TC) was fabricated via the high-pressure and low-temperature sintering (HPLT, 7.7 GPa and 150 ℃). The Nano-TC shows an integrated performance of ∼50% PLQY, 65.04% transmittance at 750 nm, and a Vickers hardness of 18.59 GPa, representing a 47.31% improvement over the single crystal. This study demonstrates a viable pathway for fabricating nano-sized YAG:Ce phosphors that concurrently achieve miniaturization and extremely high PLQY, and establishes HPLT sintering as an effective route for translating these nanocrystals into high-performance Nano-TC for next-generation lighting and display applications.
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DOI
高影响因子
Advanced Optical Materials
·
2023
·Vol. 11
·期 17
·2300399
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IF 9
Zixian Wang,Jun'an Lai,Qiang Huang,Daofu Wu,Fei Qi,Nan Zhang,Yayun Pu,Changqing Tian,Weiwei Chen,Yufei Liu,Peng He,Kang An,Xiaosheng Tang,Fei Wang,Yan Liu,Genquan Han
Organic hybrid halide perovskite, which has excellent characteristics of low cost, nontoxicity, and high recognition, has attracted extensive attention in optical anticounterfeiting applications. In this paper, (TEA) 2 ZrCl 6 (TEA = tetraethylammonium) single crystals (SCs) are synthesized by an easy-to-operate hydrothermal method, which exhibits excitation wavelength-dependent emission at 254 and 365 nm, respectively. Moreover, the photoluminescence quantum yield of (TEA) 2 ZrCl 6 SCs achieves 84.7%, with the introduction of Sb 3+ ions. (TEA) 2 ZrCl 6 and doped (TEA) 2 ZrCl 6 patterns can be recognized with excitation by different wavelengths. In addition, as-prepared (TEA) 2 ZrCl 6 crystals show interesting radioluminescence for another anticounterfeiting model with the light yield of 17 709 photons per MeV. The experimental results indicate the novel (TEA) 2 ZrCl 6 SCs have a huge potential for X-ray imaging and anticounterfeiting.
研究领域:
材料科学
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光学
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防伪技术
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DOI
高影响因子
OPTICAL MATERIALS
·
2024
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IF 3.8
Jianpu Lin,Shengjie Zhang,Lingfeng Du,Baiquan Zhang,Xiongtu Zhou,Yongai Zhang,Chaoxing Wu
The wavelength tunable and environmentally friendly InP quantum dots are considered one of the most powerful alternatives to cadmium-based quantum dots, and the luminescent devices prepared with them also show great potential. There is still room for improvement in the synthesis methods and device applications of InP based quantum dots. In this work, we report one pot synthesis route for InP/ZnSe/ZnSeS/ZnS green QDs based on tris(dimethylamino)phosphine (DMP) phosphorus by using the strategy of multi shell coating and gradient heating to reduce surface defects of quantum dots. The shell structure, dosage, and growth temperature have all been taken into account in order to explore better performance of InP QDs. The synthesized green quantum dots have 86 % PLQY and a full width at half maximum of 36 nm. In addition, the synthesized green InP quantum dots are applied in AC QLED devices. The experimental results show that the luminescence intensity is affected by the driving voltage and frequency, which is similar to the working mode of non-carrier-injected emitting devices. And there is a matching value between the voltage and frequency.
研究领域:
材料科学
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纳米技术
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Pinyi He,Jianliang Bai,Guohui Yang,Fu Qin,Xinyu Wang,Xu Yu,Yongkang Yao,Xin Tang,Lili Ren
Phenylenediamine has become a classic material for synthesizing carbon dots (CDs) due to its nitrogen doping, conjugated aromatic structure, low cost, and easy availability. Typically, the CDs obtained from m-phenylenediamine (mPD), o-phenylenediamine (oPD) and p-phenylenediamine (pPD) exhibit fluorescence that follows a rule from blue to red. However, their photoluminescence quantum yield (PLQY) is low, and the spectral coverage is relatively small, which greatly limits their application and development in high-quality white LEDs. Herein, we selected a simple and environmentally friendly succinic acid (SA) to regulate the luminescence properties, which achieve unconventional luminescent behaviors with high PLQY values (68 %, 60 %, and 72 %) and wide spectral coverage. The PL emission of the obtained CDs followed the rule of pPD, mPD, and oPD from deep-blue to red, which is different from most previously reported results. Additionally, The SA molecules altered the polymerization structure and led to changes in the conjugated domain and surface C=O and –COOH groups, achieving this unconventional luminescence with high PLQY values. Finally, high-quality white LEDs were fabricated with the CIE coordinates of (0.34, 0.33), close to the (0.33, 0.33) of pure white light. R-CDs with an absolute PLQY value of up to 72 % were also used in bioimaging. We use the same small organic acid to regulate the phenylenediamine isomer and obtain CDs with fluorescence in different shift directions. This work will provide a new idea for luminescence regulation with high PLQY values and wide spectral coverage.
研究领域:
材料科学
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光学
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生物医学工程
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DOI
高影响因子
Nano Research
·
2019
·Vol. 12
·期 7
·1733-1738
·
IF 8.515
Dong Lvming,Chen Zhuo,Ye Lei,Yu Yan,Zhang Jianbing,Liu Huan,Zang Jianfeng
Mn-doped all-inorganic perovskite quantum dots (QDs) provide prominent applications in the fields of low-cost light source or display, because of their remarkable properties including dual-color emission and reduced lead content, as well as high photoluminescence quantum yields (PLQYs) and high stability. However, the existing synthesis approaches usually require hash conditions, such as high temperature and nitrogen protection, which is a major hurdler for the practical manufacturing. In addition, the significantly high Mn substitution ratio in CsPbX 3 QDs is still challenging. The real dual-color emission with two strong emission peaks in the Mn-doped all-inorganic perovskite QDs has attracted great interest. Here we present a gram-scale approach to synthesize both CsPb x Mn 1− x Cl 3 and CsPb 1− x Mn x Cl y Br 3− y QDs at 100 °C in the air with high Mn substitution ratio, up to 55.64% atomically. The as-prepared CsPb 1− x Mn x Cl y Br 3− y QDs exhibit high PLQYs of 62.41% and dual-color emission with two strong emission peaks around at 400–450 nm and 600 nm, respectively. The enhanced peak at 400–450 nm is a result of the hybrid halides in CsPbBr x Cl 3− x host. Furthermore, the unique advantage of the optical emission and high PLQYs properties of the CsPb x Mn 1 − x Cl 3 QDs has been demonstrated as invisible ink for encryption applications and polymer composites. Our gram-scale synthesis approach for Mn-doped all-inorganic perovskite QDs may boost the future research and practical applications of QDs-based white LED, spintronics, and molecular barcoding.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Yi Zhu,Siyu Qin,Haohan Hu,Shu Nie,Xiangyi Bai,Yulong Zhao,Xiuquan Gu
Perovskite nanocrystals (NCs) are promising color converters for displays but are limited by defect-related inefficiency and instability. To address this, a one-pot synthesis is developed in which ZnO NCs and oleic acid first form stable zinc oleate complexes that anchor onto the surface of CsPbBr 3 NCs, thereby creating a stable organic-inorganic ligand shell, which suppresses degradation and Ostwald ripening during processing. Theoretical calculations confirm that the introduction of ZnO enhances the stability of NCs by raising the formation energy and suppressing defect generation. Consequently, photoluminescence quantum yield (PLQY) is boosted to 97%, representing a dramatic increase from the 32.4% value of pristine CsPbBr 3 NCs. Employing these high-performance NCs, a white light-emitting diode (WLED) was fabricated by integrating the composite film with a blue LED chip. More importantly, the NC-based composite films demonstrate robust stability under thermal, aqueous, and optical stresses, retaining > 70% of their initial PL intensity—significantly outperforming control samples (<30%). This WLED exhibits a wide color gamut, covering 129.8% of the NTSC standard and 96.9% of Rec. 2020. Subsequently, a WLED array backlight unit was fabricated and subsequently integrated into a prototype display. This work establishes the practical potential of ZnO-incorporated CsPbBr 3 NCs as efficient and stable color-conversion materials, thereby paving the way for advancing high-performance backlit display technology.
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DOI
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Liling Fei,Lin Yang,Peng Li,Jiangang Ma
Mn 2+ doped CsPbCl 3 nanocrystals (Mn 2+ :CsPbCl 3 NCs) show immense promise in lighting and display technologies owing to their outstanding optical characteristics. Nonetheless, high defect density, inefficient Mn 2+ doping, and poor structural robustness pose considerable challenges in the synthesis of Mn 2+ :CsPbCl 3 NCs with high photoluminescence quantum yield (PLQY) and long-term stability. This study introduces an eco-friendly room-temperature post-treatment method utilizing MgCl 2 /oleylamine solution, boosting the total PLQY of the NCs from 65% to 98%, including a 30% increase for Mn 2+ emission. Additionally, the post-treatment significantly improves the NCs’ resilience against UV light, retaining 80% of their initial PL intensity after 120 hours of UV exposure. Comprehensive analyses including density functional theory simulation and temperature-dependent PL spectra suggested that the PLQY enhancement is due to the improved Mn 2+ doping efficiency and the effective passivation of native vacancy defects. The stability of the NCs is enhanced by replacing Pb 2+ with Mg 2+ and Mn 2+ , mitigating lattice distortions within the [PbCl 6 ] 4− octahedral framework. The color rendering index of white light-emitting diodes fabricated with the post-treated Mn 2+ :CsPbCl 3 NCs achieves an exceptional value of 98. This work offers novel insights into the fabrication of high-PLQY Mn 2+ :CsPbCl 3 NCs, advancing the practical deployment of perovskite nanomaterials in various industries.
研究领域:
材料科学
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光学工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Laser & Photonics Reviews
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2024
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IF 9.8
Xiaoxi Li,Mengling Xia,Weiwei Li,Ping Lu,Xianghua Zhang,Yinsheng Xu
Lead-free halide perovskites (LHP) have attracted extensive attention in the field of next-generation solid-state lighting. However, single perovskite phosphor with tunable white-light emission and ultra-high photoluminescence quantum yield (PLQY) are rare. Here, the tunable dual-color emission LHP phosphor is developed with a near-unity PLQY of 99.5%. The LHP phosphor comprises Cs 2 NaInCl 6 : Sb 3+ /Bi 3+ and Cs 2 InCl 5 ·H 2 O: Sb 3+ /Bi 3+ crystals, with the transition between these two perovskite structures being adjustable by the concentration of Na + . The addition of NaCl inhibits the hydrolysis of the [Sb(H 2 O)Cl 5 ] 2− octahedron, resulting in 3D connected [SbCl 6 ] 3− octahedron with less Jahn-Teller distortion, and the PLQY of LHP is greater than 90%. Finally, the white-light diode device is fabricated by assembling the LHP with a ultraviolet light-emitting diode chip and the white light-emitting diode device achieved Commission Internationale de l'Eclairage color coordinates of (0.34, 0.33), correlated color temperature of 4936 K, and a high color rendering index of 92.9. The LHP perovskite exhibited multimodal luminescence when excited by 365, 335, and 310 nm UV light, showing the multi-mode anti-counterfeiting capabilities of the LHP crystals.
研究领域:
材料科学
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光学工程
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 21
·8356-8363
·
IF 8.067
Ye Li,Miaoling Cai,Mengling Shen,Yuting Cai,Rong-Jun Xie
The stability of perovskite nanocrystals (NCs) is greatly limited due to highly dynamic binding of ligands, which hinders their applications in optoelectronic devices. In this paper, a new ligand strategy was employed to prepare CsPbBr3 NCs via a facile room temperature (RT) ligand-assisted reprecipitation (LARP) method, where N1.N2-didodecyl-N1.N1.N2.N2-tetramethylethane-1.2-diaminium bromide (DTDB) as the sole capping ligand and an additional Br resource was used. Compared to other ligands with one coordinating group, this class of bidentate ligand can be tightly anchored to the surface of NCs with double N+ sites. The as-synthesized DTDB-CsPbBr3 NCs exhibited a high photoluminescence quantum yield (PLQY) of 92.3% and also showed a superior colloidal stability even under intense purification for up to ten cycles. Compared to the dodecyltrimethyl ammonium bromide (DTAB) ligand capped-CsPbBr3 NCs, the DTDB-CsPbBr3 NCs display obviously enhanced stability to light, heat and water. X-ray photoelectron spectroscopy (XPS) results revealed that the DTDB-CsPbBr3 NCs have a Br− rich surface, which accounts for the high stability and PLQY. Hence, DTDB is a promising ligand to prepare perovskite NCs with higher optical performance.
研究领域:
材料科学
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纳米技术
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光电技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Physics
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2022
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IF 11.021
Tao Huang,Qilin Wei,Wenchao Lin,Hui Peng,Shangfei Yao,Bingsuo Zou
In this paper, a new zero-dimensional organic-inorganic hybrid manganese bromide single crystal with high-efficiency yellow-green emission has been synthesized by inserting C 6 H 16 N 2 2+ into [MnBr 4 ] 2- tetrahedrons lattice, and its PLQY reaches up to 89%. At the same time, the relationship between the emission wavelength and relaxation process under CW laser excitation was investigated in this single crystal, exhibiting different emission colors under continuous-wave laser excitation of different wavelengths. The results show that the distance between the nearest Mn 2+ in the lattice is 6.8 Å, this number brings up a very weak ferromagnetic coupling state and a dominant paramagnetic state, which lead to a significant emission band at 550 nm and a weak emission band at about 640 nm when excited by 325 nm laser. The high-level d-d transition at about 400 nm and AFM d-d transition at 458 nm band could be found simultaneously under continuous-wave laser excitation above the bandgap, and the photophysical properties of the multiple emission bands and the microscopic interactions of the spin, carrier, and phonon inside the lattice have been discussed. These findings provide a new direction for Mn-based materials in the field of luminescence and provide ideas for the development of new materials with the microscopic interaction modulation of the spin, carrier, and phonon.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
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