Wenfu Liu

Huanghuai University

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Yinling Wang

China Medical University

Yasha Yi

University of Michigan–Ann Arbor

Xiao Wang

Xiamen University

Shule Xing

Huanghuai University

Haizi Yao

Jinan University

Wanjun Liu

Liaoning Technical University

Falin Xiong

Beijing University of Technology

Liuyang Bai

Huanghuai University

Ran Li

University of Western Australia

Andreii S. Kritchenkov

Peoples' Friendship University of Russia

Cooperative Institutions

Huanghuai University

Chinese Academy of Sciences

Donghua University

University of Chinese Academy of Sciences

China University of Geosciences

Huazhong University of Science and Technology

Shandong University

Shanghai Jiao Tong University

Sichuan University

Shanghai University of Engineering Science

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Light Trapping in Single Elliptical Silicon Nanowires

Nanomaterials (2020)

Wenfu Liu Yinling Wang Xiaolei Guo Jun Song Xiao Wang

Light trapping in single nanowires (NWs) is of vital importance for photovoltaic applications. However, circular NWs (CNWs) can limit their light-trapping ability due to high geometrical symmetry. In this work, we present a detailed study of light trapping in single silicon NWs with an elliptical cross-section (ENWs). We demonstrate that the ENWs exhibit significantly enhanced light trapping compared with the CNWs, which can be ascribed to the symmetry-broken structure that can orthogonalize the direction of light illumination and the leaky mode resonances (LMRs). That is, the elliptical cross-section can simultaneously increase the light path length by increasing the vertical axis and reshape the LMR modes by decreasing the horizontal axis. We found that the light absorption can be engineered via tuning the horizontal and vertical axes, the photocurrent is significantly enhanced by 374.0% (150.3%, 74.1%) or 146.1% (61.0%, 35.3%) in comparison with that of the CNWs with the same diameter as the horizontal axis of 100 (200, 400) nm or the vertical axis of 1000 nm, respectively. This work advances our understanding of how to improve light trapping based on the symmetry breaking from the CNWs to ENWs and provides a rational way for designing high-efficiency single NW photovoltaic devices.

Photocurrent

Ray

10.3390/nano10112121

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Citations (9)

Off-Resonant Absorption Enhancement in Single Nanowires via Graded Dual-Shell Design

Wenfu Liu Xiaolei Guo Shule Xing Haizi Yao Yinling Wang

Single nanowires (NWs) are of great importance for various optoelectronic applications, especially solar cells serving as powering nanoscale devices. However, weak off-resonant absorption can limit its light-harvesting capability. Here, we propose a single NW coated with the graded-index dual shells (DSNW). We demonstrate that with the proper thickness and refractive index of the inner shell, the DSNW exhibits significantly enhanced light trapping compared with the bare NW (BNW), and the NW only coated with the outer shell (OSNW) and inner shell (ISNW), which can be attributed to the optimal off-resonant absorption mode profiles due to the improved coupling between the reemitted light of the leak mode resonances of the Si core and the nanofocusing light from the dual shells with the graded refractive index. We found that the light absorption can be adjusted via tuning the thickness and refractive index of the inner shell, the photocurrent density is significantly enhanced by 134% (56%, 12%) in comparison with that of the BNW (OSNW, ISNW). This work advances our understanding of how to improve off-resonant absorption by applying graded dual shells and provides a new choice for designing high-efficiency single NW photovoltaic devices.

Photocurrent

High-refractive-index polymer

10.20944/preprints202008.0258.v1

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Citations (2)

Experimental study on spray characteristics of diesel-FAME blends

Vibroengineering PROCEDIA (2021)

Yijun Zhang Wenfu Liu Di Zhu

Macro-spray structural parameters and micro-droplet of diesel-FAME under the circumstance of different FAME content, injection pressure and nozzle diameter were studied. With the increase of FAME content, the spray penetration increases, and spray angle decreases, molecules viscous force and the micro-droplet size increase, which means the atomization getting worse. With the increases of injection pressure, the penetration increases, the spray angle decreases. The more FAME content, the greater the rate of them. The microscopic droplet size decreases as pressure increasing. With increased nozzle diameter, the cavitations of liquid become weak, the penetration extends, and the spray angle decreases. Droplet size becomes bigger and atomization gets worse.

Spray characteristics

Penetration (warfare)

Penetration rate

10.21595/vp.2021.21893

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Citations (0)

A semantic fusion based approach for express bill detection in complex scenes

Image and Vision Computing (2023)

Luming Zhang Junjie Peng Wenfu Liu Haochen Yuan Shuhua Tan

Pyramid (geometry)

Feature (linguistics)

10.1016/j.imavis.2023.104708

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Citations (1)

Light trapping in single coupled silicon nanowires for photovoltaic applications

Applied Physics Express (2021)

Wenfu Liu Xin Luo Xiao Wang Yasha Yi

We propose a pair of coupled nanowires (PCNWs) and examine light trapping in PCNWs with various diameters based on the finite-difference time-domain simulation. We demonstrated that light absorption in PCNWs could be significantly tuned via engineering light coupling mainly due to the reshaped and strengthened leaky mode resonances. The photocurrent of PCNWs is remarkably enhanced by 24.1% than a pair of uncoupled NWs and 28.2% than bare NW. This work provides a practical approach to increase light absorption based on the light-coupled resonant structures.

Photocurrent

Silicon nanowires

Ray

10.35848/1882-0786/ac1de6

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Citations (1)

Effect of Mo in-situ alloying on microstructure and magnetic properties of (NiFeMo)100−xMox alloy

Journal of Alloys and Compounds (2023)

Falin Xiong Jiaoxi Yang Zhicheng Du Wenfu Liu Feng Yang

Lattice constant

10.1016/j.jallcom.2023.173012

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Citations (0)

Light Trapping in Coaxial Nanowires of c-Si Cores and a-Si Shells

Springer series in materials science (2013)

Jeong Il Oh Wenfu Liu Weiqiang Xie Wenzhong Shen

Coaxial

Photocurrent

10.1007/978-1-4614-8169-0_3

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Citations (1)

BaO-Y2O3-Al2O3-SiO2/YAG:Ce: A novel YAG:Ce glass-ceramic with excellent fluorescent properties for phosphor-converted white LEDs

Ceramics International (2025)

Yaochun Qiang Yuanzhong Cao Minghao Ma Liang Sun Mengyao Zhang

10.1016/j.ceramint.2025.02.097

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Citations (0)

Application of Fe-doped biochar in Cr(VI) removal from washing wastewater and residual Cr(VI) immobilization in contaminated soil

Journal of Cleaner Production (2022)

Jinping Tang Ziyuan Liu Wenfu Liu Y. Zou Finfrock Zhihang Ye

Coprecipitation

10.1016/j.jclepro.2022.134973

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Citations (13)

Off-Resonant Absorption Enhancement in Single Nanowires via Graded Dual-Shell Design

Wenfu Liu Xiaolei Guo Shule Xing Haizi Yao Yinling Wang

Single nanowires (NWs) are of great importance for optoelectronic applications, especially solar cells serving as powering nanoscale devices. However, weak off-resonant absorption can limit its light-harvesting capability. Here, we propose a single NW coated with the graded-index dual shells (DSNW). We demonstrate that with appropriate thickness and refractive index of the inner shell, the DSNW exhibits significantly enhanced light trapping compared with the bare NW (BNW), and the NW only coated with the outer shell (OSNW) and the inner shell (ISNW), which can be attributed to the optimal off-resonant absorption mode profiles due to the improved coupling between the reemitted light of the transition modes of the leak mode resonances of the Si core and the nanofocusing light from the dual shells with the graded refractive index. We found that the light absorption can be engineered via tuning the thickness and the refractive index of the inner shell, the photocurrent density is significantly enhanced by 134% (56%, 12%) in comparison with that of the BNW (OSNW, ISNW). This work advances our understanding of how to improve off-resonant absorption by applying graded dual-shell design and provides a new choice for designing high-efficiency single NW photovoltaic devices.

Photocurrent

High-refractive-index polymer

10.20944/preprints202008.0258.v2

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Citations (1)