ACS Applied Nano Materials
·
2022
·
IF 6.14
Yicheng Zeng,Weiwei Chen,Yuan Deng,Wanying Gu,Chenxi Wu,Yating Guo,Pan Huang,Fangze Liu,Hongbo Li
Formamidinium lead bromide (FAPbBr3) nanocrystals (NCs) have been demonstrated to exhibit ideal ultrapure green luminescence at 530 nm and to hold great potential in light-emitting diodes, by potentially overcoming the difficulties facing cesium lead bromide (CsPbBr3) NCs. However, compared to all-inorganic lead halide perovskite NCs, organic–inorganic hybrid FAPbBr3 NCs are sensitive to moisture, oxygen, and heat due to their intrinsic instability caused by the organic cations (FA+). Herein, we present an epitaxial growth method for the overgrowth of a large-band-gap cesium lead halide (Cs4PbBr6) shell on the surface of FAPbBr3 NCs. The resulting core/shell NCs show a near-unity photoluminescence quantum yield (PLQY) of 97.1%, the emission with full width at half-maxima of 88 meV, and long-term environmental stability. The introduction of Cs+ into FAPbBr3 NCs can inhibit the migration of FA+ and suppress the phase transformation from cubic phase to tetragonal phase at 60 °C. Furthermore, the existence of shell can provide stronger exciton confinement and improve the thermal stability of FAPbBr3 NCs. The core/shell perovskite NCs developed in this study have the advantages of high PLQY and good stability and may contribute to the field of light-emitting diodes (LEDs).
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
MATERIALS RESEARCH BULLETIN
·
2022
·
IF 5.6
Min Yang,Yujia Yan,Enzhou Liu,Qian Sun,Jun Fan
In recent years, all-inorganic perovskite has been extensively studied due to its excellent photoelectric properties, but the application of Cs n PbBr 2+ n perovskite with excellent stability in the field of chemical sensing has yet to be developed. Herein, Cs 4 PbBr 6 /CsPbBr 3 with good stability was successfully prepared by controlling the synthesis temperature to 100 ° C. The fluorescence intensity of Cs 4 PbBr 6 /CsPbBr 3 exhibited 2,4-dinitriphenylhydrazine (DNPH) concentration-dependent characteristics and could be used for sensing DNPH based on the dynamic quenching process triggered by the collision between Cs 4 PbBr 6 /CsPbBr 3 and DNPH. A good linear model was established based on the detection signal and DNPH concentration in the range of 0.05∼30 mg/L and the detection limit was 0.033 mg/L. This method was applied to detect DNPH in soil and tap water samples with satisfactory results obtained. Therefore, this research broadens the application of Cs n PbBr 2+ n in the field of quantitative detection and is expected to be developed into a fluorescent sensor for the detection of hydrazine substances.
研究领域:
分析化学
·
材料科学
·
环境监测
·
传感器技术
·
光电子学
✓ 已验证
DOI
高影响因子
Optical Materials Express
·
2025
·Vol. 15
·期 8
·1891-1901
·
IF 3.1
Yunwei Wei,Shuqiang Lyu,Jianlei Yang,Bingwen Li,Shizhong Yue,Zecheng Zhao,Shujuan Lyu,Xinpei Li,Xinxin Li,Zhuqing Wang
All-inorganic perovskite materials have emerged as highly promising candidates for optoelectronic applications due to their outstanding optoelectronic properties. In this work, we developed an in situ synthetic strategy to fabricate CeO2/Cs4PbBr6 nanocomposites with reversible photoluminescence characteristics. Structural and optical characterization techniques, including powder X-ray diffraction, PL spectroscopy, and elemental mapping analysis, confirmed the successful formation of the nanocomposites, which exhibited photoluminescence and reversible fluorescent response specialties. Notably, systematic investigations revealed that the reaction time and CsBr/PbBr2 molar ratio are critical parameters for optimizing the performance of nanocomposites. Moreover, the practical applicability of the synthesized nanocomposites was demonstrated through the successful fabrication of a white light-emitting diode device, demonstrating their potential for application in optoelectronic devices.
研究领域:
纳米材料
·
光电子学
·
材料科学
·
无机化学
·
固体物理学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 17
·10023-10029
·
IF 3.119
Yunwei Wei,Wei Zheng,Malik Zeeshan Shahid,Zhixiang Jiang,Yuehua Li,Zhongyao Duan,Guangning Liu,Xun Hu,Cuncheng Li
Compared with nanoscale quantum dots (QDs), the large-sized perovskite crystals not only possess better stability but also are convenient for application exploration. Herein, we develop a facile and efficient antisolvent vapor-assisted recrystallization approach for the synthesis of large-sized Cs4PbBr6 perovskite crystal microplates. In this method, for the first time, the shale-like Cs4PbBr6 microplates with lateral dimensions of hundreds of microns are fabricated by employing cetyltriethylammnonium bromide (CTAB) as a morphology-directing agent. FESEM, TEM, and AFM characterizations indicate that the as-obtained shale-like Cs4PbBr6 microplates are actually formed by 6–8 nm thick Cs4PbBr6 nanosheets with orientational stacking. Importantly, such highly crystalline Cs4PbBr6 microplates with shale-like morphology exhibit a narrow and intense green PL emission with a 59% PL quantum yield. Moreover, the planar structure of shale-like Cs4PbBr6 microplates makes it easy to form a preferred orientation on a substrate, which endow them with promising potential in optoelectronic devices such as lighting and displays.
研究领域:
材料科学
·
纳米技术
·
光电技术
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Coatings
·
2022
·Vol. 12
·期 4
·512
·
IF 3.236
Song Wang,Yan Xu,Renjie Chen,Mengmeng Zhu,Muyi Wang,Mengmeng Cao,Yunpeng Liu,Haojie Ding,Shulan Zhang,Jueyao Bai,Jun Ren,Tongtong Xuan,Huili Li
All-inorganic halide perovskite nanomaterials have a high application potential in the field of display and lighting because of unique photoelectric properties. However, these materials suffer from problems related to poor water and thermal stabilities. In this study, green Eu3+-doped CsPbBr3/Cs4PbBr6perovskite composites that were synthesized by a saturated recrystallization method at room temperature showed an enhanced photoluminescence quantum yield of 87% and superior water and thermal stabilities to that of undoped perovskites. Finally, green Eu3+-doped CsPbBr3/Cs4PbBr6perovskite composites were fabricated into white light-emitting diodes (WLEDs) with a wide color gamut (124% of the National Television System Committee standard) and a high efficiency of 43.06 lm/W.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Ya-Meng Chen,Yang Zhou,Qing Zhao,Jun-Ying Zhang,Ju-Ping Ma,Tong-Tong Xuan,Shao-Qiang Guo,Zi-Jun Yong,Jing Wang,Yoshihiro Kuroiwa,Chikako Moriyoshi,Hong-Tao Sun
All-inorganic perovskites have emerged as a new class of phosphor materials owing to their outstanding optical properties. Zero-dimensional inorganic perovskites, in particular the Cs4PbBr6-related systems, are inspiring intensive research owing to the high photoluminescence quantum yield (PLQY) and good stability. However, synthesizing such perovskites with high PLQYs through an environment-friendly, cost-effective, scalable, and high-yield approach remains challenging, and their luminescence mechanisms has been elusive. Here, we report a simple, scalable, room-temperature self-assembly strategy for the synthesis of Cs4PbBr6/CsPbBr3 perovskite composites with near-unity PLQY (95%), high product yield (71%), and good stability using low-cost, low-toxicity chemicals as precursors. A broad range of experimental and theoretical characterizations suggest that the high-efficiency PL originates from CsPbBr3 nanocrystals well passivated by the zero-dimensional Cs4PbBr6 matrix that forms based on a dissolution–crystallization process. These findings underscore the importance in accurately identifying the phase purity of zero-dimensional perovskites by synchrotron X-ray technique to gain deep insights into the structure–property relationship. Additionally, we demonstrate that green-emitting Cs4PbBr6/CsPbBr3, combined with red-emitting K2SiF6:Mn4+, can be used for the construction of WLEDs. Our work may pave the way for the use of such composite perovskites as highly luminescent emitters in various applications such as lighting, displays, and other optoelectronic and photonic devices.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Huan Tian,Yi Liu,Feng-Lei Jiang
Perovskite nanocrystals attract growing interest owing to their unique optoelectronic properties. However, their chemical stability is relatively poor due to their ionic nature. In this work, we found that inorganic cations (e.g., Cs+) and ligands (e.g., didodecyldimethylammonium bromide, DDAB), used in the synthesis of CsPbBr3 nanocrystals (NCs) at ambient temperature, quickly converted CsPbBr3 NCs to Cs4PbBr6 NCs during the synthesis or postsynthetic treatment. These cations (Cs+, DDA+) were involved in both the chemical composition and dissociation of CsPbBr3 NCs. Nevertheless, DDA+ induced the generation of an impurity in addition to Cs4PbBr6 NCs due to its different nature from that of Cs+. The transformation process was observed by optical spectroscopy and transmission electron microscopy. The reverse transformation of Cs4PbBr6 NCs to CsPbBr3 NCs can be carried out completely by adding sufficient PbBr2 into Cs4PbBr6 NCs. Therefore, the forward and backward reactions were driven by Cs+ and Pb2+. With additional DDAB for passivation during the reverse transformation, the resulting product possessed a better photoluminescence quantum yield (PLQY, ∼90%) compared with that without the involvement of DDAB (∼69%). By considering the Cs4PbBr6 NCs as the Cs source, the reverse transformation can be analogized to the synthesis of CsPbBr3 NCs, providing a possible strategy for synthesizing luminescent perovskite NCs at room temperature with theoretical stoichiometry.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Jiahong Zheng,Xiudan Shi,Pengzhan Li,Zhiguo Zhao,Guangqiang Ding
Water-stable Cs4PbBr6 nanocrystals (Cs4PbBr6 NCs) are combined with ultra-stable polymer carbon dots (PCDs) to create a double-emission detection system. This system was developed specifically for identifying amoxicillin (AMX) in aqueous environments. Experimental data revealed that the Cs4PbBr6 NCs displayed bright green luminescence under UV irradiation. The emission peak was observed at a wavelength of 519 nm, with a half-peak width of approximately 30 nm. Furthermore, the fluorescence persisted for over 48 hours after the Cs4PbBr6 NCs were dissolved in water. Additionally, the probe exhibited a distinct ability to recognize AMX and demonstrated a strong linear correlation between the fluorescence intensity (F519) and various concentrations of AMX (ranging from 0 to 50 μM) when subjected to the dynamic quenching effect. The probe's detection limit for AMX was 1.048 μM, and when tested in river water, it achieved spiked recoveries ranging from 97.91% to 103.64%. The findings demonstrated a notable decrease in the fluorescence intensity at 519 nm (F519) for Cs4PbBr6 NCs as the AMX concentration increased. Conversely, the fluorescence intensity at 430 nm (F430) for the PCDs remained relatively constant. The Cs4PbBr6 NCs@PCDs, as a ratiometric probe, provide higher immunity to interference and greater accuracy, and allow for the quantitative detection of AMX in water sources such as rivers, offering a more novel, efficient and convenient method for AMX detection.
研究领域:
分析化学
·
环境科学
·
纳米材料
·
荧光传感
·
药物残留检测
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 16
·5670-5678
·
IF 4.099
Xiao Chen,Daqin Chen,Junni Li,Gaoliang Fang,Hongchao Sheng,Jiasong Zhong
As a novel type of promising materials, metal halide perovskites are a rising star in the field of optoelectronics. On this basis, a new frontier of zero-dimensional perovskite-related Cs4PbBr6 with bright green emission and high stability has attracted an enormous amount of attention, even though its photoluminescence still requires to clarification. Herein, the controllable phase transformation between three-dimensional CsPbBr3 and zero-dimensional Cs4PbBr6 is easily achieved in a facile ligand-assisted supersaturated recrystallization synthesis procedure via tuning the amount of surfactants, and their unique optical properties are investigated and compared in detail. Both Cs4PbBr6 and CsPbBr3 produce remarkably intense green luminescence with quantum yields up to 45% and 80%, respectively; however, significantly different emitting behaviors are observed. The fluorescence lifetime of Cs4PbBr6 is much longer than that of CsPbBr3, and photo-blinking is easily detected in the Cs4PbBr6 product, proving that the zero-dimensional Cs4PbBr6 is indeed a highly luminescent perovskite-related material. Additionally, for the first time, tunable emissions over the visible-light spectral region are demonstrated to be achievable via halogen composition modulations in the Cs4PbX6 (X = Cl, Br, I) samples. Our study brings a simple method for the phase control of CsPbBr3/Cs4PbBr6 and demonstrates the intrinsic luminescence nature of the zero-dimensional perovskite-related Cs4PbX6 products.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Materials Technologies
·
2021
·Vol. 6
·期 12
·2100654
·
IF 7.848
Ze Wang,Yaqian Zhang,Xiaodong Liu,Yanxia Yu,Fucai Xu,Jing Ding,Xiaojuan Liang,Keqin Yang,Weidong Xiang
In this study, a simple low-temperature self-assembly strategy is used to synthesize the CsPbBr 3 /Cs 4 PbBr 6 nanocomposite with a relatively high photoluminescence quantum yield (PLQY, 72%) and product yield (87%). As expected, the nanocomposite exhibits good photoluminescence (PL) performance and stability. Further, 90% of the PLQY is maintained even when heating at 100 °C for 24 h, and almost no emission degradation is observed after storage in ethanol for 10 days. Furthermore, the prepared CsPbBr 3 /Cs 4 PbBr 6 nanocomposite exhibits the reversible luminescence phenomenon by simply applying the wetting and drying process. This abnormal phenomenon is due to the internal phase transformation of the CsPbBr 3 /Cs 4 PbBr 6 nanocomposite. The potential application of the nanocomposite in anti-counterfeiting has been demonstrated. This work facilitates the production and application of inorganic metal halide perovskite-based functional materials.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 37
·12811-12818
·
IF 7.393
Yao Li,Kaimin Du,Manli Zhang,Xuan Gao,Yu Lu,Shuang Yao,Chengyu Li,Jing Feng,Hongjie Zhang
Metal halide perovskites are a new class of promising materials in optoelectronic applications. As the optoelectronic properties of lead halide perovskites are determined largely by their morphology, the morphology of perovskites is crucial for their applications. However, the morphology-controllable synthesis of Cs4PbBr6 perovskites has been scarcely reported so far. Here, zero-dimensional Cs4PbBr6 perovskite microcrystals with tunable size and ultra-uniform morphology were synthesized via a facile precipitation method. The as-prepared Cs4PbBr6 microcrystals possess high photoluminescence quantum yields of up to 98% and excellent stability. The content of ligands plays a dominant role in the solubility of PbBr2 and can compete with Cs+ ions for the surface passivation of Cs4PbBr6 microcrystals, thus modulating the kinetics of the reaction to influence the size and phase of the final products. Meanwhile, the synthesized Cs4PbBr6 microcrystals have outstanding thermal stability compared with CsPbBr3 perovskites. Highly emissive hexagonal Cs4PbBr6 microcrystals with excellent stability were used as phosphors for white light emitting diodes (WLEDs), and the luminous efficiency of the WLED device was determined to be as high as 116.84 lm W−1. This study provides an effective and facile approach to fabricate stable Cs4PbBr6 microcrystals with tunable size and excellent photoluminescence properties.
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
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Xiaoxia Feng,Pengxiao Xu,Jinli Liu,Xiyue Zhao,Jing Cao,Jiacheng Liu
Zero-dimensional Cs4PbBr6 nanocrystals (NCs) possess attractive photoluminescence (PL) properties and feature facile chemical synthesis, making them promising for application in luminescent materials. However, Cs4PbBr6 remains sensitive to polar solvents and thermal stimuli because of soft ionic nature of Cs4PbBr6 and dynamic behavior of surface ligands. Herein, a strategy controlled by an in situ surface coordination reaction is developed to fabricate stable NCs with a Cs4PbBr6-Zn(moi)2 core–shell structure. It was found that the Cs4PbBr6 surface regulated by the use of 2-mercaptoimidazole (called moi) and the coordination between the −NH group of moi and Zn2+ is critical for the formation of Cs4PbBr6-Zn(moi)2 core–shell NCs. Meanwhile, the thickness of the Zn(moi)2 shell can be facilely controlled by the growth time because of the solubility of moi and Zn(OAc)2·2H2O in ethyl acetate. Compared to bare Cs4PbBr6, Cs4PbBr6-Zn(moi)2 NCs exhibited highly improved polar solvent resistance and thermal stability. By combining the sensitivity of Cs4PbBr6 and the stability of Cs4PbBr6-Zn(moi)2, we used two NCs as PL security inks to fabricate optical anticounterfeiting labels. Thus, the disposable or reusable optical anticounterfeiting label is achieved by changing the external dual-stimuli. This work provides a novel strategy to enhance the stability of Cs4PbBr6 and develop its potential interest for application in anticounterfeiting technologies.
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
危险品化学品经营许可证（带存储）