Simulation and Optimization Characteristic of Novel MoS<sub>2</sub>/c-Si HIT Solar Cell
- 1 China-EU Institute for Clean and Renewable Energy, Huazhong University of Science & Technology, Wuhan, China
- 2 School of Optical and Electronic Information, Huazhong University of Science & Technology, Wuhan, China
- 3 School of Optical and Electronic Information, Huazhong University of Science & Technology, Wuhan, China
- 4 China-EU Institute for Clean and Renewable Energy, Huazhong University of Science & Technology, Wuhan, China
- 5 School of Optical and Electronic Information, Huazhong University of Science & Technology, Wuhan, China
- 6 School of Optical and Electronic Information, Huazhong University of Science & Technology, Wuhan, China
- 7 School of Optical and Electronic Information, Huazhong University of Science & Technology, Wuhan, China
Abstract
Monolayer MoS 2 has excellent optoelectronic properties, which is a potential material for solar cell. Though MoS 2 /c-Si heterojunction solar cell has been researched by many groups, little study of MoS 2 /c-Si solar cell physics is reported. In this paper, MoS 2 /c-Si heterojunction solar cells have been designed and optimized by AFORS-HET simulation program. The various factors affecting the performance of the cells were studied in details using TCO/n-type MoS 2 /i-layer/p-type c-Si/BSF/Al structure. Due to the important role of intrinsic layer in HIT solar cell, the effect of different intrinsic layers including a-Si:H, nc-Si:H, a-SiGe:H, on the performance of TCO/n-type MoS 2 /i-layer/p-type c-Si/Al cell, was studied in this paper. The results show that the TCO/n-type MoS 2 /i-layer/p-type c-Si/Al cell has the highest efficiency with a-SiGe:H as intrinsic layer, efficiency up to 21.85%. The back surface field effects on the properties of solar cells were studied with p + μc-Si and Al as BSF layers. And the effect of various factors such as thickness and band gap of intrinsic layer, thickness of MoS 2 , density of defect state and the energy band offset of MoS 2 /c-Si interface of TCO/n-type MoS 2 /i-layer nc-Si:H/p-type c-Si/Al cells, on the characteristics of solar cells, have been discussed for this kind of MoS 2 heterojunction cells. The optimal solar cell with structure of TCO/n-type MoS 2 /i-type nc-Si:H/p-type c-Si/BSF/Al, has the best efficiency of 27.22%.
- Pham, T.A., Choi, B.C. and Jeong, Y.T. (2010) Facile Covalent Immobilization of Cad-mium Sulfide Quantum Dots on Graphene Oxide Nanosheets: Preparation, Characteriza-tion, and Optical Properties. Nanotechnology, 21, Article ID: 465603. https://doi.org/10.1088/0957-4484/21/46/465603
- Addou, R., Colombo, L. and Wallace, R.M. (2015) Surface Defects on Natural MoS 2 . ACS Applied Materials & Interfaces, 7, 11921-11929. https://doi.org/10.1021/acsami.5b01778
- Li, X. and Zhu, H. (2015) Two-Dimensional MoS 2 : Properties, Preparation, and Applica-tions. Journal of Materiomics, 1, 33-44. https://doi.org/10.1016/j.jmat.2015.03.003
- Ganatra, R. and Zhang, Q. (2014) Few-Layer MoS 2 : A Promising Layered Semiconductor. ACS Nano, 8, 4074-4099. https://doi.org/10.1021/nn405938z
- Nishiguchi, K., Castellanos-Gomez, A., Yamaguchi, H., et al. (2015) Observing the Semiconducting Band-Gap Alignment of MoS 2 Layers of Different Atomic Thicknesses Using a MoS 2 /SiO 2 /Si Heterojunction Tunnel Diode. Applied Physics Letters, 107, Article ID: 053101. https://doi.org/10.1063/1.4927529
- Tao, J., Chai, J., Lu, X., et al. (2015) Growth of Wafer-Scale MoS 2 Monolayer by Magnetron Sputtering. Nanoscale, 7, 2497-2503. https://doi.org/10.1039/C4NR06411A
- Bernardi, M., Palummo, M. and Grossman, J.C. (2013) Extraordinary Sunlight Absorption and One Nanometer Thick Photovoltaics Using Two-Dimensional Monolayer Materials. Nano Letters, 13, 3664-3670. https://doi.org/10.1021/nl401544y
- Hao, L., Liu, Y., Gao, W., et al. (2015) Electrical and Photovoltaic Characteristics of MoS 2 /Sip-n Junctions. Journal of Applied Physics, 117, Article ID: 114502. https://doi.org/10.1063/1.4915951
- Tsai, M., Su, S., Chang, J., et al. (2014) Monolayer MoS 2 Heterojunction Solar Cells. ACS Nano, 8, 8317-8322. https://doi.org/10.1021/nn502776h
- Chaudhary, R., Patel, K., Sinha, R.K., et al. (2016) Potential Application of Mono/Bi-Layer Molybdenum Disulfide (MoS 2 ) Sheet as an Efficient Transparent Conducting Electrode in Silicon Heterojunction Solar Cells. Journal of Applied Physics, 120, Article ID: 013104. https://doi.org/10.1063/1.4955071
- Lopez-Sanchez, O., Lembke, D., Kayci, M., et al. (2013) Ultrasensitive Photodetectors Based on Monolayer MoS 2 . Nature Nanotechnology, 8, 497-501. https://doi.org/10.1038/nnano.2013.100
- Rawat, A., Sharma, M., Chaudhary, D., et al. (2014) Numerical Simulations for High Efficiency HIT Solar Cells using Microcrystalline Silicon as Emitter and Back Surface Field (BSF) Layers. Solar Energy, 110, 691-703.