期刊
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
卷 146, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mssp.2022.106661
关键词
Silicon nanowires (Si-NWs) array; Metal nanoparticles (NPs); PbS colloidal Quantum dots (CQDs); Finite-difference time-domain (FDTD) software; Ultimate efficiency
类别
资金
- Projects of the Key R & D projects of the Ministry of Science and Technology of China [SQ2019YFB220038]
- Fundamental Research Funds for the Central Universities in China [2020CX02002, BITBLR2020013]
- Open foundation of Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University [2021GXYSOF18]
This study successfully enhances the light absorption capability of silicon nanowire array-based solar cells in the long-wavelength region by filling metal nanoparticles or PbS quantum dots, and makes full use of the localized surface plasmons and scattering effects generated around the metal nanoparticles, providing a valuable theoretical basis for designing high-performance Si-NWs array-based solar cells.
Being the unique physical structure and excellent optoelectronic properties, silicon nanowires (Si-NWs) array is considered to be a key nanostructure to build low-cost and high-efficiency solar cells, showing excellent performance of photons capturing and anti-reflection. In this work, the light absorption enhancement of Si-NWs array based solar cells by filling plasmonic metal nanoparticles (NPs), such as Au, Ag and Al, and/or PbS quantum dots (QDs) in the gaps of Si-NWs or depositing on the tips of Si-NWs, are simulated by using finitedifference time-domain (FDTD) software, respectively. Based on the proposed geometry of periodic Si-NWs array, our simulation demonstrates that the light absorption in the long-wavelength region can be greatly enhanced by filling suitable metal NPs or PbS QDs to form a certain thickness layer or depositing metal NPs on the tips of Si-NWs, by making good use of the localized surface plasmons and scattering generated around metal NPs, or the high absorption of PbS QDs in near-infrared region. Also, our simulation is in agreement with experimental data reported in literatures. Therefore, our work provides a valuable theoretical basis for designing high-performance Si-NWs array based solar cells.
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