IEEE Journal of Photovoltaics
·
2024
·Vol. 14
·期 4
·583-591
·
IF 2.5
Juan Hong,Jianxin Sun,Xin Liu,Yixuan Huang,Longqing Jiang,Shuangyu Liu,Feng Qian,Shen Honglie,Yang Yang,Rulong Chen,Guanghua Song
In the present study, we establish a physical model for laser-assisted localized boron doping in N-type tunnel oxide passivated contact (TOPCon) solar cells by employing the fluid dynamics method. Our simulations reveal that a flat-top beam inflicts less thermal damage on silicon than a Gaussian beam at a constant laser energy density. Additionally, we observe an acceleration in the flow rate of molten silicon in the molten pool as the laser energy density increases. This acceleration facilitates efficient doping of boron atoms into the silicon substrate, albeit accompanied by an expansion of the local thermal damage range. In light of these findings, we utilized boron-doped silicon paste as a doping source in experiments conducted on a 15 MW TOPCon solar cells production line employing four distinct laser energy densities. The experiments yielded a reduction in the sheet resistance to 81.9 Ω/cm in the boron-doped regions, an increase in the peak boron doping concentration to 1.08 × 10
19
atoms/cm
3
, and a doping depth of 2.38
μ
m. Consequently, the highest efficiency enhancement recorded was 0.14%, culminating in an efficiency of 25.06%. This research outlines the mechanism of the laser-assisted localized boron doping process and provides insights for enhancing the efficiency of TOPCon solar cells.
研究领域:
光伏技术
·
半导体器件
·
材料科学
✓ 已验证
DOI
高影响因子
BIOMATERIALS
·
2025
·
IF 12.9
Zhibin Li,Guangtao Huang,Xiangqiang Dai,Mulan Qahar,Zi Ye,Minghui Wang,Jiawen Deng,Xiaoqi Zhang,Yan Zhou,Yu He,Shi Chen,Jun Wu
Clinically, despite tremendous efforts having been devoted to preventing the invasive bacterial infection in acute and chronic wounds, the abuse or excessive use of antibacterial agents still poses great hurdles for wound management, which significantly raises the risk of detrimental side-effects and complications in the wound disinfection. Herein, we develop a hydrogel dressing of MPAH to attain real-time infection monitoring and on-demand antibacterial therapy. In this scenario, we propose a creative strategy of applying laser-facilitated MPAH photodecomposition of H 2 O 2 to trigger the burst release of reactive oxygen species (ROS) and thus eliminate bacteria. Taking advantage of the visible indication of pH variability and laser-mediated ROS burst release, MPAH permits real-time monitoring of wound infection status and simultaneously endows it with superior on-demand antibacterial activity at a low H 2 O 2 dosage. Beyond that, MPAH also provides a favorable healing environment synergistically promotes wound closure and re-epithelialization. With these merits, MPAH presents a vast potential for wound disinfection and simultaneously addresses the histotoxicity issues of routinely used medical H 2 O 2 (3%, V/V). Therefore, our study not only pioneers the exploration of a promising alternative antibacterial strategy, but more excitingly, also opens a profound vista for potential biomedical applications of laser-facilitated H 2 O 2 photodecomposition.
研究领域:
生物医学工程
·
伤口护理
·
感染控制
·
光动力疗法
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Tao Long,Zixin Wang,Yuxiao Fan,Hui Lin,Haojie Sun,Cheng Zou,Dawei Zhang,Songlin Zhuang
In this study, two kinds of composite ceramic phosphors, Ce 3+ :YAG/Al 2 O 3 and Ce 3+ :Y(Gd)AG/Al 2 O 3 were prepared via solid state reaction sintering in flowing pure oxygen at atmospheric pressure. The ceramic phosphors were packaged into chip-scale white light emitting diodes (w-LEDs), and laser assisted w-LED automobile headlight prototypes were assembled. The luminous flux output of the w-LEDs was significantly improved through additional blue diode laser excitation. Notably, the Al 2 O 3 phase is able to impart an improvement in the luminescence saturation exhibited by Ce 3+ :Y(Gd)AG, which typically reaches saturation prior to Ce 3+ :YAG.
研究领域:
材料科学
·
光学工程
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Min Zhu,Zongqiang Sheng,Zhifen Fu,Yang Li,Juan Gao,Chao Zhang
Exploring cost-effective non-noble metal-based catalysts with high activity and stability is of great significance for energy conversion and storage involving oxygen evolution reaction (OER). Here, we employed a laser irradiation technique to synthesis Fe doped CoO nanoparticles with ultrafine size (≈ 5.4 nm) and abundant oxygen vacancies (Fe-O v -CoO). The ultrafine size of Fe-O v -CoO nanoparticles provides more active sites to be exposed. Fe doping and oxygen vacancy promote the intrinsic activity and electron transfer rates of Fe-O v -CoO, giving rise to high activity and stability catalyst for OER. Fe-O v -CoO delivers a large current density of 1000 mA cm −2 at an overpotential of 548 mV, which is much better than commercial RuO 2 . Moreover, Fe-O v -CoO presents a remarkable long-term stability with negligible degeneration at a high current density of 500 mA cm −2 for 120 h. This work provides a new route to develop OER electrocatalyst with high activity and stability.
研究领域:
材料科学
·
电化学
·
能源转换与存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Guang Yang,Yihang Guo,Xiangjie Bo
Herein, a simple and fast laser-assisted coupling method is used for preparation of rod-like carbon-coated Mo/MoO 2 hybrids at room temperature and air environment. Under high energy of laser and reductive atmosphere caused by precursor decomposition, Mo-polydopamine complex-wrapped MoO 3 rods are quickly converted into nitrogen-doped carbon-coated Mo/MoO 2 rods. Carbon-coated Mo/MoO 2 exhibits high surface area, uniform metal dispersion and appealing hydrogen evolution reaction (HER) catalytic performance in a wide pH range. Carbon-coated Mo/MoO 2 shows overpotential of 134, 108 and 164 mV to deliver current density of 10 mA cm −2 under alkaline, acidic and neutral solution, respectively. Theoretical calculation demonstrates that combination of Mo and MoO 2 into Mo/MoO 2 composite favors the dissociation of water and adsorption of hydrogen. This study not only provides a high-efficiency strategy for preparation of electrocatalysts but also give guidance for development of hybrid electrocatalysts for HER.
研究领域:
材料科学
·
电催化
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IEEE TRANSACTIONS ON ELECTRON DEVICES
·
2024
·
IF 2.9
Zongtao Li,Zelong Li,Jiasheng Li,Guanwei Liang,Jiahao Meng,Xinrui Ding
The laser-assisted micro-transfer printing (Laser-assisted
$\mu $
TP) technology is considered a highly promising solution for the mass transfer of micro-LEDs, which offers a series of benefits, including high transfer accuracy, fast transfer speed, and selective transfer capability, but it also presents a risk of micro-LED damage due to laser exposure. To solve this issue, this article proposes an improvement to the Laser-assisted
$\mu $
TP by introducing a novel carbon particle-doped polydimethylsiloxane (PDMS) stamp (CPD stamp). The carbon particles doped in the stamp enhance the laser absorption capability of the stamp, thereby reducing chip damage. At the same time, the pristine adhesion strength of CPD stamp declines by 98.35% attributed to the design of surface microstructure, accelerating chip ejection and improving the transfer speed. After optimization, the optimal CPD stamp demonstrates the potential for high-speed transfer, as it is demonstrated that the detachment of the chips from the optimal CPD stamp occurs within 117 ms. Meanwhile, the micro-LEDs are successfully transferred by optimal CPD stamp without degradation. In conclusion, the CPD stamp proposed in this article provides an effective solution to the drawbacks of Laser-assisted
$\mu $
TP, potentially advancing the commercialization process of this technology
研究领域:
材料科学
·
光学工程
·
微纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yuchen Zhu,Jian Xu,Haiyan Zhang,Aodong Zhang,Boxin Chen,Bin Zhao,Lei Li,Xuhong Qian,Ya Cheng,Fei Feng
A novel micro gas chromatography column (μGCC) with straight-sided elliptic microchannel cross sections was prepared by ultrafast laser-assisted chemical etching inside a glass substrate . The straight-sided elliptic cross sections resulted in a uniform distribution of the flow velocity field . This uniform distribution and the use of a microchannel with a consistent composition led to a uniform stationary phase coating. Upon the separation of a test mixture of C7–C11 alkanes, highly symmetrical chromatographic peaks were obtained. The tailing factors of the chromatographic peaks ranged from 0.95 to 1.05, which satisfies the relevant provisions of Pharmacopoeia of the People's Republic of China (ChP). The test results show that the improvement of the tailing factors is mainly due to the optimization of the cross-section structure rather than the optimization of the test conditions. Notably, due to the simple preparation processes and the low cost of the glass substrate, the total manufacturing cost of this novel μGCC is low.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2022
·Vol. 68
·期 10
·e17827
·
IF 4.167
Jinzhe Cao,Jiangwei Zhang,Shengyang Tao
5-(Hydroxymethyl)furfural (5-HMF) is a vital platform molecule from which a variety of high-value-added fine chemicals and polymerizable monomers can be prepared. The use of solid acids to catalyze the conversion of biomass into 5-HMF is environmentally friendly and economical. However, exploiting the high yield of 5-HMF in a highly concentrated reactant system is challenging. Herein, we present a laser-assisted method for preparing highly acidic monolithic acidic catalysts. A monolithic acidic catalyst based on metal Zr sheets was synthesized and used to catalytically convert 30 wt% fructose into 5-HMF (conversion rate: 96%; yield: 95%). The catalyst was immediately separated from the reaction solution by direct removal at the end of the reaction. Catalytic efficiency was largely unaffected after 10 cycles of use, and the same catalytic efficiency was observed after laser-regeneration, highlighting the potential industrial applicability of the developed catalyst.
研究领域:
化学工程
·
催化科学
·
生物质能
✓ 已验证
产品关联
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2025
·
IF 4.5
Luoxin Li,Wei Xiao,Lianjie Lu,Luntao Xia,Chenhe Shao,Yong Huang,Xin Liu,Zhenjin Xu,Qibin Zhuang,Zhengmao Ding,Dezhi Wu
Real-time monitoring of bearing operational status is critical for mechanical equipment safety. However, integrated temperature-strain sensors often encounter crosstalk between signals, which affects the accuracy and stability of measurements. Achieving precise in-situ monitoring of bearing temperature and strain conditions remains a significant technical challenge. Here, highly linear and stable AgNPs thin-film temperature sensors (AgNPs TFTSs) and AgNPs microcrack thin-film strain gauges (AgNPs MTFSGs) are proposed using laser-assisted printing technology, which are capable of accurately acquiring condition parameters of bearing. The printed AgNPs TFTS exhibited a low hysteresis error of 2.6 % and a high linearity of 0.999. The microcracks in AgNPs MTFSG were induced by ultraviolet (UV) laser, yielding a significant enhancement of the gauge factor (GF) from 1.03 (baseline) to 3.19. This twofold sensitivity improvement was achieved while maintaining excellent linearity (R²=0.997). In particular, these thin-film sensors exhibited good stability even when applied to bearings. Typically, AgNPs TFTS and AgNPs MTFSG maintained a low resistance drift rate of 0.012 %/h and a repeatability error of 2.1 % respectively, demonstrating broad adaptability. In addition, both AgNPs TFTS and AgNPs MTFSG exhibited excellent dynamic and static response characteristics. This provides a method for the direct in-situ fabrication of thin-film sensors with high linearity and high stability on mechanical components, such as gears, bolts, and so on.
研究领域:
材料科学
·
传感器技术
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 22
·225404
·
IF 3.953
Jiayin Zhu,Ran Zhang,Liye Zhu,Xuan Liu,Tiying Zhu,Ziang Guo,Yan Zhao
Gold (Au) can be used as an ideal metal electrocatalyst for ethanol and glucose oxidation reactions due to its high performance-to-cost ratio. In this paper, the Au aerogel with high-index facets was synthesized by using the laser ablation in liquid technology, which can improve the electrocatalytic activity of Au. The as-prepared Au aerogel showed excellent mass activity and specific activity toward ethanol oxidation reaction, which are 4.6 times and 2.1 times higher than Au/C, respectively. The 3D porous nature and rich defect of the Au aerogel provide more active sites. In addition, the high-index facets with under-coordinated atoms enhance the adsorption of ethanol and glucose molecules, thus improving the intrinsic catalytic activity of Au aerogel. The effect of high-index facets has also been investigated by density functional theory calculations. Furthermore, the Au aerogels also show good electrocatalytic activity and stability toward glucose oxidation reaction. These results are conducive to promote the practical application of Au in electrocatalysis.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 41
·17954-17960
·
IF 3.288
Wuyun Xie,Guang Yang,Mingqi Xu,Xiangjie Bo
Herein, a universal laser-assisted growth method is applied for supporting transition metal nanoparticles on three dimensional graphene (3D GR). Different from chemical/thermal reduction or deposition methods, all experimental steps could be achieved at room temperature and in air environment using laser irradiation as the energy source and metal–organic frameworks (MOFs) as precursors. Another unique property is that metal nanoparticle/3D GR could act as an electrode for a nonenzymatic glucose sensor. Due to the porous nature and catalytic properties of the metal nanoparticles, metal nanoparticle/3D GR shows a high direct oxidation activity toward glucose in alkaline solution. Co/3D GR achieves a linear range of 10–3020 μM and a limit of detection of 2.7 μM and is selective to common interferences, indicating its promising application for glucose determination. Such an easy, facile, and universal method could be extended for the rapid preparation of metal particle/GR and other electrochemical applications.
研究领域:
材料科学
·
电化学
·
分析化学
✓ 已验证
DOI
高影响因子
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
·
2018
·Vol. 25
·期 2
·1-9
·
IF 3.367
Caiyun Li,Huajiang Wei,Yanping Zhao,Guoyong Wu,Huaimin Gu,Zhouyi Guo,Hongqin Yang,Yonghong He,Shusen Xie
This study aims to monitor and assess the penetration and accumulation of titanium dioxide nanoparticles (TiO
2
NPs) (25 nm and 60 nm) and the penetration of the TiO
2
NPs assisted by diode laser radiation (LR) in human normal endometrium (NE) and uterine leiomyoma (UL) tissues. In the 210 min ex vivo experiments, optical coherence tomography (OCT) and diffuse reflectance (DR) spectral measurement were used to study the changes in optical properties of tissues after TiO
2
NPs suspension administering. The results show that TiO
2
NPs make the OCT signal intensities and DR spectra of both NE and UL tissues increase with time, and larger NPs produce greater signal enhancement. In addition, there are significant differences between NE and UL tissues in terms of the values of attenuation coefficients. The experiment results indicate that the same size of the NPs penetrate faster in UL tissues than that in NE tissues, and 25 nm TiO
2
NPs allow larger penetration depth than 60 nm TiO
2
NPs in tissues. LR can remarkably increase the penetration of TiO
2
NPs in two types of tissues, especially in UL tissues. Analysis of attenuation coefficients and reflectance intensity reveals that the accumulation of the TiO
2
NPs in NE and UL tissues has great influence on the tissue optical properties.
研究领域:
生物医学工程
·
纳米医学
·
妇科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）