Advanced Materials Technologies
·
2022
·Vol. 7
·期 9
·2200131
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IF 8.856
Jinfeng Xie,Linzhong Wu,Muhan Cao,Qixuan Zhong,Ying Zeng,Chuanxin Ni,Qingyi Qian,Xiaohong Zhang,He Huang
1D APbX 3 (A = Cs, MA, FA, X = Cl, Br, I) nanorods (NRs) show potential for the future integrated optoelectronic devices as the ideal building blocks due to their outstanding optoelectronic performances. However, there is still a lack of high-efficiency controllable strategies to synthesize CsPbX 3 NRs. An interfacial synthesis strategy is shown here to fabricate CsPbBr 3 NRs by inserting Pb 2+ into postsynthetic CsBr nanocrystals in vortex method at the water-hexane interface. The water phase can intrinsically separate from the hexane phase in such a system and take away excess Pb 2+ and other side reaction salts. Additionally, without additional ligand assisted growth, the whole reaction system could result in a very clean surface of CsPbBr 3 NRs, eliminating the further purification process. The new approach for interfacial synthesis paves the way for efficient synthesis of CsPbBr 3 nanorods.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 11
·3806-3813
·
IF 7.393
Hui Fu,Huilin Hou,Zhi Fang,Chaoyi Chen,Weiyou Yang,Junqi Li,Jinju Zheng
In the present work, we report a strategy for aligned packaging of in situ grown CsPbBr3 nanorods (NRs) within polystyrene (PS) nanofibers (CsPbBr3 NR@PS) based on magnetic field assisted electrospinning for enhanced polarized luminescence properties. The as-constructed CsPbBr3 NR@PS fiber membrane exhibits an improved orientation and increased aspect ratio (AR) of the aligned CsPbBr3 NRs within the PS fibers with the increase of the external magnetic field strength. Consequently, their luminescence polarization ratio (P) can be fundamentally enhanced with the increase of the external magnetic field strength. The P of the sample prepared at a magnetic field of 150 mT reaches 0.23, which is 2.6 times that of the conventional analogue fabricated without a magnetic field, and close to the theoretical emission polarization one (Pem-theory), representing their potential applications in optical devices such as liquid crystal displays.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Huaihao Zhang,Dingfa Fu,Zhentao Du,Hui Fu,Gang Shao,Weiyou Yang,Jinju Zheng
The growth of one-dimensional nanostructured semiconductors with aligned configuration and tunable aspect rations is recognized as one of the critically important and fundamental issues, for exploring polarized light sources as the back lights in liquid crystal display (LCD) with desired optical performance. In the present work, aiming to endow the perovskite nanocrystals (NCs) with enhanced stability and polarized optical performance, we reported the in situ growth of aligned CsPbBr 3 nanorods in polystyrene (PS) fibers, which was based on a facile one-step electrospinning technique. It was found that the electrospinning temperatures could have a profound effect on the growth of CsPbBr 3 nanorods with various aspect ratios (ARs), enabling their growth in a tailored manner. The mechanism on the tunable growth of aligned CsPbBr 3 nanorods in PS fibers was proposed.
研究领域:
材料科学
·
光电领域
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2019
·
IF 3.355
Jun Cui,Fanfan Xu,Quan Dong,Junjie Jia,Lili Liu,Shuifu Liu,Fengli Yang,Xinyu Ye
All inorganic cesium lead halide perovskite nanocrystals have attracted widespread attention due to their excellent optical properties. However, large-scale synthesis of high photoluminescence quantum yield (PLQY) CsPbBr 3 nanorods (NRs) is still challenging. Herein, we report a facile, low-cost and large-scale synthesis of CsPbBr 3 NRs with 86 % PLQY at room temperature, in which the employment of acetic acid as precursor solvent promoted the concentrations of Cs + and Pb 2+ in the precursor solution and dominated the formation of CsPbBr 3 NRs. The synthesized CsPbBr 3 NRs with an average width of around 8 nm and average lengths of 18–30 nm have an excellent narrow-band (FWHM = 17 nm) green emission peaked at 517 nm.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
化学合成
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Qingyuan Zhou,Xiaohu Zhao,Yuanchen Jiang,Junwei Zhou,Zhen Liu,Kai Pan
One-dimensional CsPbBr3 nanocrystals (NCs) possess significant potential in laser and photodetection fields due to their longer carrier lifetimes, more efficient carrier transport, and anisotropic optical properties. In recent years, Cs4PbBr6 has been employed to synthesize highly luminescent one-dimensional CsPbBr3 NCs; however, the poor stability of CsPbBr3 NCs produced by this method has limited their practical applications. In this study, CsPbBr3 nanorods (NRs) were prepared by removing CsBr from Cs4PbBr6 using a postsynthetic method. Water was added dropwise to Cs4PbBr6 NCs dispersed in a nonpolar solvent. Due to the high solubility of CsBr in water, the Cs4PbBr6 NCs rapidly converted into CsPbBr3 NCs. At this point, the addition of water-induced dipole–dipole interactions within the system drives the self-assembly of CsPbBr3 NCs into NRs. As the amount of water increased, the local concentration of CsPbBr3 NCs also rose, raising the probability of collisions between CsPbBr3 NCs and resulting in the formation of longer NRs. Subsequently, benzoic acid was introduced to replace the ligands removed along with CsBr. Due to the surface passivation effect of benzoic acid, the stability and photoluminescence performance of the CsPbBr3 NRs were significantly enhanced. The resulting CsPbBr3 NRs exhibited a fluorescence lifetime of 45.97 ns and achieved a high photoluminescence quantum yield (PLQY) of 94.2%. Stability tests showed that the ligand-passivated CsPbBr3 NRs retained 65% of their initial photoluminescence intensity after one month of storage in an open atmospheric environment.
研究领域:
纳米材料
·
钙钛矿纳米晶体
·
光电子学
·
光物理
·
胶体化学
✓ 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）