ACS Applied Materials & Interfaces
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2022
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IF 10.383
Xin Liu,Quanchao Zhang,Dou Zhao,Ruichen Bai,Yinjie Ruan,Binbin Zhang,Fangpei Li,Menghua Zhu,Wanqi Jie,Yadong Xu
Solution-grown hybrid perovskite, FAPbBr3, has attracted great attentions recently due to its inspiring optoelectronic properties and low-cost preparation method. However, challenges of solution growth for FAPbBr3 bulk crystals remain yet, such as uncontrollable crystalline morphologies, irregular shapes, and limited crystal sizes, which are attributed to the dense crystallization nucleus. In this work, we investigate the effects of growth conditions and seed behaviors on the crystallization quality and the yield of FAPbBr3 single crystals. First, the spontaneous nucleation is tailored by optimizing the precursor concentration and heating rate. Furthermore, the seeded crystals are introduced to solve the issues related to the morphology and the yield of single crystals. Based on the above-mentioned investigations, an optimized growth method, a seeded solution method, under a heating rate of 0.1 °C/h is proposed, and centimeter-scale FAPbBr3 single crystals with a very narrow FWHM of high-resolution X-ray diffraction rocking curves and a high yield of ∼100% of single crystals are obtained. The resulting FAPbBr3 single crystal exhibits a bulk resistivity of 3.42 × 109 Ω·cm and a superior ION/IOFF ratio over 104 under 405 nm light at a bias of 10 V. Finally, the pulse height spectra with an energy resolution of ∼21.4% are also achieved based on an AZO/FAPbBr3/Au detector, illuminated using an uncollimated 241Am@5.49 MeV α-particle source at room temperature. This modified seeded solution method shows great potential in preparing high-quality and high-yield perovskite single crystals.
研究领域:
材料科学
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晶体生长
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半导体物理
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DOI
PubMed
高影响因子
ACS Photonics
·
2024
·
IF 6.5
Qinglin Zeng,Jibin Zhang,Xinzhen Ji,Meng Wang,Shuailing Lin,Meng Su,Qianli Liu,Linyuan Lian,Mochen Jia,Xu Chen,Zhuangzhuang Ma,Ying Liu,Yanbing Han,Yongtao Tian,Xin-Jian Li,Zhifeng Shi
The polar solvent of water can disrupt the structure of lead halide perovskite nanocrystals (PeNCs), and its presence is inevitable during the synthesis process. Therefore, it is crucial to understand the impact of synthetic atmospheric humidity on the performance of PeNCs and their electroluminescence. In this study, we first synthesized formamidine lead bromide (FAPbBr3) PeNCs at different relative air humidities and explored their optoelectronic properties and electroluminescence. We found that under optimal humidity conditions (40% R.H.), water molecules can reduce the nucleation growth barrier of PeNCs through ligand replacement. This process results in nanocrystals with good crystallinity and fewer defects, thereby reducing defect states and nonradiative recombination. The perovskite light-emitting diodes (PeLEDs) based on these FAPbBr3 PeNCs exhibit a maximum luminance of 39,000 cd m–2 and a peak external quantum efficiency of 16.2%, surpassing most reported values in the literature without the use of any additional additives. This study elucidates the role of atmospheric humidity in the growth of PeNCs and introduces the concept of humidity-assisted synthesis, which is crucial for scaling up production in the industry.
研究领域:
材料科学
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光电技术
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DOI
高影响因子
JOURNAL OF CATALYSIS
·
2021
·
IF 7.92
Shuhui Yang,Xi Ke,Qizan Chen,Runda Huang,Weizhe Wang,Kunqiang Wang,Kaixiang Shu,Chen Tu,Zhaoqiang Zheng,Dongxiang Luo,Haowei Huang,Menglong Zhang
Constructing mixed dimensional materials have been regarded as an outstanding approach to maximum the advantages from materials of different dimensions. In this work, we prepared a mixed dimensional photocatalyst based on Formamidinium lead bromide (FAPbBr 3 ) perovskite and 2D materials (2DMs). The aim of this work is to utilize distributions of the active sites in 2DMs, through growing FAPbBr 3 on the different position of 2DMs, the concentration of photogenerated charges is manipulated, thus conducting different reactions. A pre-treatment using HBr to increase the unsaturated bonds in MoS 2 presents significant influence on the FAPbBr 3 growth and its photocatalytic product. The scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS) confirm that the perovskite nanoparticles were well loaded on the 2D materials. The photocatalytic process and the heterojunction arrangement are demonstrated by X-ray photoelectron spectroscopy (XPS), time-resolved photoluminescence (TRPL), electron paramagnetic resonance (EPR) and surface photovoltage microscopy (SPVM). By adjusting the weight ratios and growth of FAPbBr 3 on the top of 2DMs, the optimized composite photocatalyst (with 30 wt% of FAPbBr 3 ) exhibits remarkable photoactivity for oxidation of benzyl alcohol into benzaldehyde (30 wt% FAPbBr 3 @WS 2 performed 75.9% conversion in 4 h, approximately 9-fold than the pure 2DMs). Meanwhile, by growing FAPbBr 3 on the edge of 2DMs, benzoic acid is obtained as the product. Although longer reaction time is needed, the photocatalyst performs outstanding activity (30 wt% FAPbBr 3 @MoS 2 reached 84.5% conversion in 5 h).
研究领域:
材料科学
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催化化学
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DOI
高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 11
·2100-2106
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IF 3.756
Song-Tao Dong,Zhuang Fu,Miaocheng Yu,Jia-Ling Jiang,Xiaoyun Jin,Yu-Hang Guo,Lei Wang,Ya-Mei Zhang
Self-powered photoelectric devices as a new type of sensor without an external power source have a great potential advantage in the next generation of portable and wearable personal devices. The design of those devices is normally based on three kinds of strategies: a p–n junction, the Schottky junction and ferroelectric polarization. Here, a novel solution based on ion migration induced self-powered photodetectors was explored. In this work, high quality halide perovskite FAPbBr3 crystals were grown by an inverse temperature crystallization (ITC) method. An irreversible ion migration was intentionally created using a symmetrically structured Au/FAPbBr3/Au device. The resulting built-in electric field and energy band bending were proved using electrical measurements in the dark and under light. Finally, the response of the ion migration induced self-powered FAPbBr3 detector was investigated with the values of R (∼0.18 mA W−1) and EQE (∼0.055%) under light with a power density of 1 mW cm−2 and a wavelength of 397 nm. Our investigation demonstrates that ion migration, which is normally deemed a detrimental factor for device stability, can be intentionally used for self-powered photoelectric devices.
研究领域:
材料科学
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光电子学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Meidan Que,Weihua Cai,Yang Zhao,Yawei Yang,Boyue Zhang,Sining Yun,Jin Chen,Gangqiang Zhu
Mimicking the natural photosynthesis process to convert carbon dioxide into value-added chemicals is vital to solving both the climate crisis worldwide and the depletion of fossil fuels. Herein, we explore the synthesis of 2D FAPbBr 3 nanoplate combined with 2D Ti 3 C 2 nanosheet to form a 2D/2D FAPbBr 3 /Ti 3 C 2 Schottky heterojunction using facile hot-injection and in-situ growth approaches. The Schottky heterojunction of FAPbBr 3 /Ti 3 C 2 over large interfacial contact provides abundant channels for transferring photogenerated carriers from FAPbBr 3 nanoplate to Ti 3 C 2 nanosheet. The experimental results showed a CO yield of 93.82 μmol·g −1 ·h −1 with ethyl acetate/deionization water as a sacrificial reagent for FAPbBr 3 /Ti 3 C 2 composite, which was 1.25-fold enhancement that on pristine FAPbBr 3 nanoplates. The large 2D heterointerface can efficiently accelerate the spatial separation and transfer of photogenerated carriers and result in the superior photocatalytic activity and favorable stability of FAPbBr 3 /Ti 3 C 2 photocatalysts, which are proved by in-situ X-ray photoelectron spectroscopy, photoluminescence, transient absorption spectra, and Mott-Schottky measurement. Thus, this work unveils that 2D/2D Schottky heterostructures would significantly improve the reaction activities of halide perovskite-based photocatalysts.
研究领域:
材料科学
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环境科学
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化学
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DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 40
·2303729
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IF 19
Qingyuan Li,Yifan Zheng,Xin Guo,Guodong Zhang,Guoyu Ding,Yifeng Shi,Fenghua Li,Mengjie Sun,Yuchuan Shao
Underwater solar cells (UWSCs) provide an ideal alternative to the energy supply for long-endurance autonomous underwater vehicles. However, different from conventional solar cells situated on land or above water, UWSCs give preference to use wide bandgap semiconductors (≥1.8 eV) as light absorber to match underwater solar spectra. Among wide bandgap semiconductors, FAPbBr 3 perovskite is under prime consideration owing to its matching optical bandgap (≈2.3 eV), outstanding photoelectric properties, easier processability, etc. Unfortunately, for FAPbBr 3 solar cells, substantial interface defects greatly limit the charge carrier extraction efficiency, thus limiting the device performance, especially in underwater low-light environments. This study employs a molecular self-assembly strategy to effectively eliminate the interfacial defects. As a result, a great improvement in power conversion efficiency (PCE) from 6.44% to 7.49% is obtained, which is among the best efficiency reported for inverted FAPbBr 3 solar cells up to date. Besides, a champion PCE of 30% is obtained under 520 nm monochromatic light irradiation (4.8 mW cm −2 ). These results demonstrate that FAPbBr 3 solar cells present a tremendously promising application in UWSCs.
研究领域:
材料科学
·
能源技术
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2021
·
IF 9.229
Yan-Fei Mu,Chao Zhang,Meng-Ran Zhang,Wen Zhang,Min Zhang,Tong-Bu Lu
Up to now, the majority of the developed photocatalytic CO2 reduction systems need to use expensive sacrificial reductants as electron source. It is still a huge challenge to drive the photocatalytic CO2 reduction using water as an electron source. Herein, we report a facile strategy for the construction of direct Z-scheme heterojunction of LF-FAPbBr3/α-Fe2O3, which is manufactured by the in situ and two-step controlled growth of ligand-free formamidinium lead bromide (LF-FAPbBr3) nanocrystals on the surface of α-Fe2O3 nanorods. The matchable energy levels and direct contact between LF-FAPbBr3 and α-Fe2O3 significantly accelerate the interfacial charge transfer, with a charge separation efficiency (ηseparation) of 93%, much higher than that of 11% shown by the ligand-capped FAPbBr3/α-Fe2O3 heterojunction. The resulting efficient separation and raised redox ability of photogenerated carriers endow the LF-FAPbBr3/α-Fe2O3 heterojunction with an outstanding photocatalytic performance for CO2 reduction (to CO and CH4) coupled with water oxidation (to O2), achieving a highest electron consumption rate of 175.0 μmol g–1 h–1 among the reported metal halide perovskite-based photocatalysts, which are 5 and 11 times higher in comparison with those of sole LF-FAPbBr3 and ligand-capped FAPbBr3/α-Fe2O3, respectively.
研究领域:
材料科学
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环境科学
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化学
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Bingke Xie,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
Previously, many methods have been used to reduce NOx pollution. Semiconductor photocatalytic oxidation technology has been widely used among those methods because of its environmental friendliness, high efficiency, and simple implementation. Hybrid halide perovskites with exceptional optical properties prove to be promising photocatalysis material; however, their high surface energy, unpaired bonds, and instability are obstacles to large-scale application. In this work, FAPbBr 3 /g-C 3 N 4 heterostructures were successfully synthesized by growing FAPbBr 3 nanocrystals on 2D g-C 3 N 4 nanosheets. Compared with the pristine elements, FAPbBr 3 /g-C 3 N 4 composites show significant NO removal efficiencies under 600 ppb concentration at room temperature. The high performance could be attributed to the formation of a type-II heterojunction and accelerated the separation and transfer of electrons and holes. Furthermore, cycling experiments and XRD results verify that the FAPbBr 3 /g-C 3 N 4 heterojunction owns good stability. Thus, this work not only shows the great potential prospect of halide perovskite for the photocatalysis field, but also demonstrate its promise in solving energy issues and environment science.
研究领域:
环境科学
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材料科学
·
化学工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yanqing Zu,Jun Xi,Lu Li,Jinfei Dai,Shuangpeng Wang,Feng Yun,Bo Jiao,Hua Dong,Xun Hou,Zhaoxin Wu
To best catch human eyes in next-generation displays, the updated recommendation 2020 (Rec. 2020) standard has called for ultrapure green emitters to be qualified with a narrow emission of 525–535 nm with a full width at half-maximum (fwhm) below 25 nm. However, it is still challenging to find an emitter which can simultaneously cover these two criteria. Instead of traditional II–VI group semiconductor quantum dots, perovskite nanocrystals (NCs) can render versatile emitting tunability to allow them access to the Rec. 2020 standard. Herein, to realize the critical window of Rec. 2020, we have proposed a scalable, room temperature synthesis route of formamidinium lead bromide (FAPbBr3) NCs using a sole ligand of sulfobetaine-18 (SBE-18). The as-synthesized FAPbBr3 NCs exhibit an ideal emission at 534 nm with an ultranarrow fwhm of 20.5 nm and a high photoluminescence quantum yield of 90.6%, overwhelming the FAPbBr3 nanoplates capped with oleic acid/oleylamine (OA/OAM). Introducing these high quality NCs into backlight displays, an ultrapure green backlight which covers ≈85.7% of the Rec. 2020 standard in the CIE 1931 color space is achieved, signifying the “greenest” backlight till now. Thus, we can foresee perovskite NCs as the most potential candidates for next-generation displays.
研究领域:
材料科学
·
显示技术
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DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2022
·
IF 9.417
Weizhe Wang,Haowei Huang,Xi Ke,Xiao Liu,Shuhui Yang,Kunqiang Wang,Le Huang,Chen Tu,Zhaoqiang Zheng,Dongxiang Luo,Menglong Zhang
Photocatalytic benzyl alcohol (BA) oxidation to value-added chemicals by semiconductors has attracted massive attentions due to its industrial interest. In this work, Z-scheme heterojunction photocatalysts composed of FAPbBr 3 nanocrystals (NCs) and WO 3 with different morphologies are prepared. Benefiting from the strong redox potential and morphological engineering, the Z-scheme heterojunction photocatalyst exhibits an outstanding performance of BA oxidation to benzaldehyde (BD) with 99% selectively. Remarkably, after manipulating the size of FAPbBr 3 NCs to quantum dots (QDs), benzoic acid (BZ) as the main product (90% selectivity) of BA oxidation can be generated on the Z-scheme photocatalyst. As revealed by in-situ electronic paramagnetic resonance (EPR), a new radical will be generated over the FAPbBr 3 QDs/WO 3 which alters the product of benzyl alcohol oxidation form BD to BZ.
研究领域:
材料科学
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催化
·
光化学
·
纳米技术
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Xuemei Wang,Lei Yu,Qi Kang,Lu Chen,Yuchen Jin,Guizheng Zou,Dazhong Shen
Perovskite nanocrystals (NCs) are regarded as potential candidates as electrochemiluminescence (ECL) emitters due to their excellent photoluminescence ability. Herein, we report the ECL behavior of FAPbBr 3 NCs (FA stands for CH(NH 2 ) 2 ) in the aqueous media. It was shown that the ECL of FAPbBr 3 NCs can be obtained by hole-injection to oxidize their reduced states, with the emission peak centered around 534±1 nm and the full width at half maximum of 31±0.5 nm. The annihilation ECL of FAPbBr 3 NCs was 4.3± 0.4 folds enhanced by adding 8% (w/w) CNTs. In the presence of tripropanolamine (TPrA) as the co-reactant, the anodic ECL intensity of FAPbBr 3 was enhanced by a factor of 29 in compared with its annihilation ECL. The ECL intensity of FAPbBr 3 NCs was enhanced 4.8 and 10.6 folds by using TiO 2 nanoparticles (NPs) as the co-reaction accelerator and CNTs as the conductivity enhancer, respectively. In the mixture of TiO 2 NPs @FAPbBr 3 NCs @CNTs, the enhancement in ECL intensity of FAPbBr 3 NCs by a factor of 21.6 was obtained. The anodic ECL of TiO 2 NP @FAPbBr 3 NCs @CNTs/GCE was applied to determination dopamine in the linear range of 0.01–10 μM, with the detection limit of 2.9 nM.
研究领域:
材料科学
·
分析化学
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生物医学工程
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Qiaopeng Cui,Xiang Zhang,Dingshuo Zhang,Xinyang Wang,Zichao Ma,Zaishang Long,Mo Zhou,Jiajun Luo,Haiping He,Zhizhen Ye,Xingliang Dai
Perovskite light-emitting diodes (PeLEDs) have been substantiated as promising candidates for high-efficiency electroluminescence. However, the maximum external quantum efficiency (EQE) of state-of-the-art PeLED is typically achieved at relatively low current densities and exhibits severe efficiency roll-off under intense electrical excitation, thereby restricting their development in high-power applications. Specifically, the uniformity of electrical injection has usually been neglected in optimization strategies, primarily due to inadequate comprehension of the microscale injection. In this study, a modified deposition method, marked static reaction deposition, is developed. The residence of precursor solution on the magnesium-doped zinc oxide substrate enables the perovskite crystalline growth homogeneously, thereby enabling the construction of a perovskite polycrystalline emission film with an ultra-low root mean square roughness of 0.72 nm. The resultant enhancement in electrical injection uniformity effectively suppresses localized carrier over-injection and mitigates EQE roll-off. The fabricated PeLED demonstrates a maximum luminance of 590,000 cd m −2 at a high current density of 964 mA cm −2 and maintains an EQE exceeding 10% at current densities up to 1000 mA cm −2 . These findings delineate a novel and broadly applicable optimization paradigm for realizing high-luminance, low roll-off, and efficient PeLEDs.
研究领域:
材料科学
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光电子学
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纳米技术
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半导体器件
·
薄膜制备
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）