JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Teng Gao,Tianshu Chen,Haijiang Tian,Qiusheng Lin,Hongping Duan,Siyuan Li,Bosen Zhang
All-inorganic cesium lead halide perovskite quantum dots (CsPbX 3 QDs) exhibit exceptional optoelectronic properties but suffer from poor stability under ambient conditions, which severely limits their practical applications. In this work, a sequential passivation strategy was developed to simultaneously enhance the photoluminescence quantum yields (PLQYs) and long-term stability of CsPbX 3 QDs. First, 4-bromobutyric acid (BBA) and oleylamine (OLA) were employed as co-ligands during a recrystallization synthesis in aqueous solution, yielding BBA/OLA-capped CsPbX 3 QDs with improved water resistance. Subsequently, the as-prepared QDs were further treated with phenethylammonium bromide (PEABr) to passivate residual surface defects, particularly bromide vacancies, forming a dense hydrophobic ligand shell. Systematic characterization using transmission electron microscopy, X-ray diffraction, UV–vis absorption, photoluminescence spectroscopy, and X-ray photoelectron spectroscopy revealed that the sequential passivation not only refines the morphology and crystallinity but also significantly suppresses non-radiative recombination. The resulting PEABr/BBA/OLA-CsPbX 3 QDs exhibit superior stability under various harsh conditions, including high humidity (70% RH), water immersion, continuous UV irradiation (365 nm), and elevated temperatures (up to 100 °C). As a proof of concept, a white light-emitting diode (WLED) was fabricated using the passivated QDs as the green-emitting layer together with a commercial InGaN blue chip and CsPb(Br/I) 3 red QDs. The device achieves Commission Internationale de l’Éclairage (CIE) color coordinates of (0.3302, 0.3261), a correlated color temperature of 5650 K, and a high color rendering index of 96, demonstrating stable white emission under varying driving currents. This sequential passivation strategy provides a facile and effective route to high-performance, ultra-stable CsPbX 3 QDs for next-generation display and solid-state lighting applications.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2026
·
IF 5.1
Yuxin Pan,Guangrui Shi,Zhen Bao,Qi Liu
Metal halide perovskite quantum dots (PQDs) have attracted considerable attention for wide-color-gamut display applications due to their high quantum yield and narrow-band emission characteristics. However, their poor stability has long been a major obstacle to practical applications. In this study, PQDs were confined within SBA-15 molecular sieves via a hot-injection method. The resulting composites were further embedded into a poly(methyl methacrylate) (PMMA) matrix, successfully yielding tricolor composite films. These composite films retain vivid emission colors and exhibit excellent optical performance. Compared with the corresponding B, G, and R-SBA powders, the PMMA-composited blue, green, and red films show almost no noticeable red shift in their maximum emission wavelengths. Meanwhile, the full width at half maximum (FWHM) of the emission peaks is significantly narrowed, indicating improved spectral purity. In addition, the composite films demonstrate outstanding water stability. After immersion in water for 840 h, the photoluminescence (PL) intensities of the B, G, and R-SBA/PMMA composite films remain at approximately 75%, 110%, and 46% of their initial values, respectively. Furthermore, white-light LEDs constructed from the tricolor composite films exhibit a wide-color-gamut, which covers 131% of the NTSC standard. These results indicate that the composite films show great potential for display applications. Overall, this work demonstrates that the composite films, combining excellent optical performance with superior water resistance, provide a promising strategy for applications in LED backlighting and display devices.
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2026
·Vol. 14
·期 11
·e03329
·
IF 7.2
Haochen Zhou,Wenkui Wu,Ting Chen,Chunxian Guo,Mengdi Zhao,Zhixiang Xie
CsPbX 3 perovskite nanocrystals (NCs) have attracted considerable attention for their exceptional optoelectronic properties, yet their poor stability hinders practical applications. In this study, we developed a hydrogen-bonded cocrystal-coated composite (CsPbX 3 @CA-M) by exploiting the rapid co-crystallization of cyanuric acid (CA) and melamine (M) assisted by the ionic liquid Pyr 14 BF 4 (IL). The IL effectively coordinated with unbonded Pb atoms on the perovskite surface, suppressing surface defects and enhancing both quantum efficiency and stability. Simultaneously, the CA-M cocrystal layer further reduced trap states through covalent bonding, improving structural robustness. The CsPbBr 3 @CA-M composite retained its crystallinity and strong photoluminescence under UV irradiation and in 1 m NaOH or 1 m HNO 3 , demonstrating remarkable chemical durability. Even after 30 days of storage, its photoluminescence intensity remained nearly unchanged, whereas that of uncoated CsPbBr 3 NCs decayed rapidly. These findings confirm that CA-M cocrystal encapsulation effectively shields perovskite NCs from environmental degradation, offering a simple and efficient strategy to simultaneously enhance their stability and optoelectronic performance.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Yi Zhu,Feng Tong,Hui Si,Liji Su,Wenguang Dai,Shu Nie,Zheng Chen,Sheng Huang,Xiuquan Gu
Perovskite quantum dots (PQDs) have shown exceptional optoelectronic properties for displays, but their practical application is hindered by low efficiency and poor stability stemming from high defect density. To address this, a one-pot synthesis has been developed, using ZnO nanocrystals (NCs) as a structure-directing agent to construct a unique sandwich architecture. These QDs consist of a ZnO core, an epitaxially grown CsPbX 3 crystalline domain, and an outer ZnO shell. Theoretical calculations reveal that ZnO incorporation significantly enhances QD stability by raising the formation energy and suppressing defect generation. Consequently, Attributed to effective defect passivation and interfacial stabilization by the ZnO sandwich structure, the PQDs exhibit a high photoluminescence quantum yield (PLQY) of 95%, compared to ~52% for the pristine counterparts. More importantly, the PQD-based composite films exhibit high stability under combined thermal, aqueous, and optical stresses, retaining over 70% of their initial PL intensity, which is markedly higher than that of <30% retained by the control samples. Moreover, continuously tunable emission from 518 to 690 nm was realized by adjusting the halide composition. A high-performance white LED was fabricated by integrating the QD composite film with a blue LED chip, achieving a color gamut covering 134% NTSC and 100% Rec. 2020. This work provides a solution through a one-pot synthesized sandwich structure that concurrently enhances both the efficiency and stability of PQDs, paving the way for future displays.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Huiwen Liu,Zhennan Wu,Hang Gao,Jieren Shao,Haoyang Zou,Dong Yao,Yi Liu,Hao Zhang,Bai Yang
CsPbX3 (X = Cl, Br, I) nanocrystals (NCs) are competitive emitting materials for illumination and display because of their outstanding photophysical properties. However, the conventional synthetic approaches suffer from low yields, complex procedures, and toxic chemicals. In this work, we demonstrate a one-step microwave-assisted approach to prepare CsPbX3 NCs. The homogeneous heating and rapid temperature increment of microwave preparation facilitate the growth of CsPbX3 NCs, producing the NCs with high photoluminescence quantum yields up to 90%, narrow emission full-width at half-maximum, and emission color tunable from blue to red. By optimizing the preparation conditions of the microwave-assisted approach, CsPbX3 NCs with cation- and halide anion-controlled emission properties, tunable reaction rate, and enhanced stability are prepared. Light-emitting diode (LED) prototypes are further fabricated by employing the as-prepared CsPbX3 NCs as the color conversion materials on commercially available 365 nm GaN LED chips.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2018
·Vol. 6
·期 19
·1800400
·
IF 7.43
Leiming Wu,Keqiang Chen,Weichun Huang,Zhitao Lin,Jinlai Zhao,Xiantao Jiang,Yanqi Ge,Feng Zhang,Quannan Xiao,Zhinan Guo,Yuanjiang Xiang,Jianqing Li,Qiaoliang Bao,Han Zhang
Perovskites are demonstrated as an excellent prospect for applications in all-optical switching due to their excellent nonlinear optical effects. In this contribution, 2D cesium lead iodine (CsPbI 3 ) quantum dots (QDs) and cesium lead bromine iodine (CsPbBr x I 3− x ) nanosheets (NSs) are prepared, characterized, and applied in all-optical switching, and their asymmetric nonlinear optical response is also investigated. Moreover, the impact of the beam distortion on the CsPbI 3 QDs and CsPbBr x I 3− x NSs is systematically analyzed. An all-optical switching technique based on perovskite QDs and NSs is experimentally investigated, which is realized by modulating the propagation of the signal beam with another controlling beam using spatial cross-phase modulation. The achievement of all-optical switching indicates that perovskites can be developed as an excellent optical material for all-optical signal processing. The contribution reveals the potential applications of perovskites as a new type of optical information material, and it is therefore anticipated that CsPbI 3 QDs, CsPbBr x I 3− x NSs, and other 2D perovskite NSs could find promising applications in photonics devices (such as optical modulators, optical switchers, and detectors).
研究领域:
材料科学
·
光学工程
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Analysis and Testing
·
2021
·Vol. 5
·期 1
·40-50
·
IF 0
Tan Xiao-Hong,Huang Guo-Bin,Cai Zhi-Xiong,Li Fei-Ming,Zhou Yan-Mei,Zhang Mao-Sheng
The application of all-inorganic CsPbX 3 (X = Cl − , Br − and I − ) perovskite nanocrystals (PNCs) is hindered by their poor stability under different environments (moisture, UV light and high temperature). Herein, we demonstrate a novel in-situ growth and post-coating technique to prepare monodisperse spherical sandwiched structured SiO 2 @CsPbX 3 @SiO 2 perovskite composites. In this strategy, the environmental stability of CsPbX 3 PNCs is remarkably improved due to protecting evenly distribution in the surface of composites through the design of spherical sandwiched structure, and the negative effects of SiO 2 coating on photoluminescence property of CsPbX 3 PNCs could be reduced effectively. Furthermore, regular monodisperse spherical structure and uniform size of composites greatly benefit their application in relative fields. The experiment results indicate that the as-prepared product have outstanding abilities of water-, oxidation- and UV radiation resistance. Finally, the SiO 2 @CsPbBr 3 @SiO 2 perovskite composites are successfully used for highly sensitive detection of Fe 3+ in water sample. The results show limit of detection (LOD) is 3 µM and good linearity is between 10 and 70 µM ( R 2 = 0.9963). Furthermore, the proposed perovskite composites have been successfully applied for the analysis of Fe 3+ in real samples with satisfactory results.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
ADVANCED FUNCTIONAL MATERIALS
·
2016
·Vol. 26
·期 15
·2435-2445
·
IF 11.382
Xiaoming Li,Ye Wu,Shengli Zhang,Bo Cai,Yu Gu,Jizhong Song,Haibo Zeng
Recently, Kovalenko and co-workers and Li and co-workers developed CsPbX 3 (X = Cl, Br, I) inorganic perovskite quantum dots (IPQDs), which exhibited ultrahigh photoluminescence (PL) quantum yields (QYs), low-threshold lasing, and multicolor electroluminescence. However, the usual synthesis needs high temperature, inert gas protection, and localized injection operation, which are severely against applications. Moreover, the so unexpectedly high QYs are very confusing. Here, for the first time, the IPQDs' room-temperature (RT) synthesis, superior PL, underlying origins and potentials in lighting and displays are reported. The synthesis is designed according to supersaturated recrystallization (SR), which is operated at RT, within few seconds, free from inert gas and injection operation. Although formed at RT, IPQDs' PLs have QYs of 80%, 95%, 70%, and FWHMs of 35, 20, and 18 nm for red, green, and blue emissions. As to the origins, the observed 40 meV exciton binding energy, halogen self-passivation effect, and CsPbX 3 @X quantum-well band alignment are proposed to guarantee the excitons generation and high-rate radiative recombination at RT. Moreover, such superior optical merits endow them with promising potentials in lighting and displays, which are primarily demonstrated by the white light-emitting diodes with tunable color temperature and wide color gamut.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
光子学
·
半导体器件
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Yanxia Yu,Yufeng Zhou,Yujie Zhang,Yaqian Zhang,Xiaodong Liu,Xiaojuan Liang,Jianping Liu,Suqin Chen,Weidong Xiang
All inorganic CsPbX 3 (X = Cl, Br, I) perovskite quantum dots (QDs) have been widely reported. However, the poor stability of CsPbX 3 QDs limits their application in the field of optoelectronics . In this work, CsPbX 3 QDs were prepared by the hot injection strategy. We compounded CsPbX 3 QDs with mica to improve stability. A series of novel CsPbX 3 @mica composites with high thermal stability and light radiation stability were successfully fabricated and the narrow full width at half maximum (FWHM) of blue, green and red emissions are ~17 nm, ~21 nm and ~37 nm, respectively. What's more, the photoluminescence quantum yield (PLQY) of CsPbBr 3 @mica composite is 38.5%. Notably, the white light-emitting diodes (wLED) device can be manufactured by coupling the red-emitting CsPbBr 1 I 2 @mica composite material and commercial phosphor YAG: Ce 3+ with the InGaN chip to produce bright natural white light. Meanwhile, CsPbX 3 @mica composites can be used as color conversion materials to construct a LED device, which exhibits a wide color gamut covering up 115.7% of National Television System Committee (NTSC). This present work provided novel CsPbX 3 @mica composites and could bring the potential inspiration in backlit display and lighting applications.
研究领域:
材料科学
·
光电技术
·
显示与照明应用
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2023
·Vol. 11
·期 9
·2203028
·
IF 9
Guozhen Li,Qiwen Pan,Zhihao Zhou,Ranran Gu,Hao Zhang,Xiongjian Huang,Guoping Dong,Xiudi Xiao
Perovskite CsPbX 3 (X = Cl, Br, I) nanocrystals with advantages of high quantum yield, narrow emission peaks, and tunable fluorescence are considered as the next generation of light-emitting sources. However, fluorescence degradation due to the poor stability of perovskite nanocrystals in moisture, high temperature, and illumination remains one of the greatest challenges in their further development. In this work, a fully dense coating strategy is proposed to improve the overall stability of perovskite nanocrystals, especially under high-density laser irradiation. A mesoporous silica SiO 2 layer is introduced to construct a stable coating for isolating the perovskite from external environment. To eliminate the pores of the CsPbX 3 @SiO 2 , an inorganic glass is also employed via solution-combustion technique to generate a fully compact encapsulation for further stability promotion. The as-prepared nanocrystal-in-glass composite exhibits efficient and stable fluorescence performance in luminous efficiency, chromaticity, and long-term reliability in the conditions of thermal shock, humidity, and blue laser irradiation. With the integration of red/green/blue emitting nanocrystals, the color gamut of the white laser lighting source covers 134% of the National Television Standards Committee standard, providing exciting opportunity for high performance laser-driven white light generation.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Pengli Li,Di Yang,Yeshu Tan,Muhan Cao,Qixuan Zhong,Min Chen,Huicheng Hu,Baoquan Sun,Yong Xu,Qiao Zhang
Although all-inorganic CsPbX3 (X = Cl, Br, I) nanocrystals (NCs) have been considered as a promising material for photoelectronic devices, their applications are still limited because of their poor stability and the lack of in-depth understanding. Here, we demonstrate a post-treatment method for the preparation of ultrathin CsPbX3 nanowires (NWs) by treating CsPbBr3 nanocubes with thiourea solution. A systematic study showed a consecutive interfacial transformation process, in which CsPbBr3 nanocubes were first converted to Cs4PbBr6 NCs in the presence of thiourea, followed by a further transformation to CsPbBr3 NCs through an interfacial CsX-stripping process. To reduce the surface energy, an oriented attachment process has been realized and CsPbBr3 NCs aggregated to form ultrathin NWs. The ultrathin CsPbBr3 NWs exhibited high photoluminescence quantum yield (up to 60%) and high resistance to water treatment, which can be attributed to the surface passivation by thiourea. In addition to thiourea, cysteine and thioacetamide that contain the thiol group can also be used to trigger this transformation. This work can not only offer a facile method for the synthesis of efficient and stable ultrathin CsPbBr3 NWs but also help to reveal the in-depth mechanisms which may be very useful in the field of metal halide perovskite NCs.
研究领域:
材料科学
·
纳米技术
·
光电设备
·
无机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Xiaotu Yang,Zihao Yue,Ruixiang Deng,Zhengliang Zhang,Tao Zhang,Lixin Song
Stability hinders further development of all-inorganic CsPb X 3 ( X = Cl, Br, I) quantum dots (QDs) although they exhibit promising prospects in optoelectronic applications. Coating perovskite quantum dots (PQDs) with a glass network to form QD glass can significantly improve their stability. However, the dense glass network degrades their luminescent performance. In this work, the crystallization behavior of PQDs in glass and better luminescence properties are prompted by introducing titanium dioxide into borosilicate glass. The luminescence intensity of TiO 2 -doped CsPbBr 3 QD glass is increased by 1.6 times and the PLQY is increased from 49.8 % to 79 % compared to the undoped glass. Evidence proves that the improved properties are attributed to the enhanced nucleation effect of titanium dioxide during the annealing process. Benefiting from the densification of the glass network caused by titanium dioxide doping, the stability of the PQD glass is further improved. LED devices with an ultra-wide color gamut that fully covers the NTSC1953 standard and achieves 128.6 % of the NTSC1953 standard as well as 91.1 % of the Rec.2020 standard were fabricated by coupling PQD glass powder, demonstrating promising commercial applications of PQD glass in optoelectronic displays.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）