| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Spectrum-Splitting Diffractive Optical Element of High Concentration Factor and High Optical Efficiency for Three-Junction Photovoltaics |
| Dong-Feng Lin1,2, Bao-Gang Quan1, Qiu-Lin Zhang1,3, Dong-Xiang Zhang1,3, Xin Xu1,2, Jia-Sheng Ye4, Yan Zhang4, Dong-Mei Li1,2**, Qing-Bo Meng1,2**, Li Pan5, Guo-Zhen Yang1,3** |
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190
2Key Laboratory for Renewable Energy, Chinese Academy of Sciences; Beijing Key Laboratory for New Energy Materials and Devices; and Institute of Physics, Chinese Academy of Sciences, Beijing 100190
3Laboratory of Optical Physics, Chinese Academy of Sciences, Beijing 100190
4Department of Physics, Capital Normal University; Beijing Key Laboratory for THz Spectroscopy and Imaging, Key Laboratory of THz Optoelectronics, Ministry of Education, Beijing 100048
5State Key Lab of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209
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| Cite this article: |
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Dong-Feng Lin, Bao-Gang Quan, Qiu-Lin Zhang et al 2016 Chin. Phys. Lett. 33 094207 |
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Abstract A spectrum-splitting and beam-concentrating (SSBC) diffractive optical element (DOE) for three-junction photovoltaics (PV) system is designed and fabricated by five-circle micro-fabrication. The incident solar light is efficiently split into three sub-spectrum ranges and strongly concentrated on the focal plane, which can be directly utilized by suitable spectrum-matching solar cells. The system concentration factor reaches 12$\times$. Moreover, the designed wavelengths (450 nm, 550 nm and 650 nm) are spatially distributed on the focal plane, in good agreement with the theoretical results. The average optical efficiency of all the cells over the three designed wavelengths is 60.07%. The SSBC DOE with a high concentration factor and a high optical efficiency provides a cost-effective approach to achieve higher PV conversion efficiencies.
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Received: 25 July 2016
Published: 30 September 2016
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| PACS: |
42.15.Eq
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(Optical system design)
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42.25.Fx
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(Diffraction and scattering)
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42.79.Ek
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(Solar collectors and concentrators)
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