期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 2, 期 19, 页码 6796-6800出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta00097h
关键词
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资金
- Shanghai Science & Technology Committee [12521102501]
- Shanghai Educational Committee [11ZR1426500, 14ZZ127]
- first-class discipline construction planning in Shanghai University
- PCSIRT [IRT1269]
- Program of Shanghai Normal University [DZL124]
Various-sized arrays of CuO nanoleaves (NLs) were fabricated on a pyramid-textured c-Si wafer. The CuO NL/c-Si solar cells show a great increase of the optical absorption and a reduction of the reflectance in the 250-1250 nm wavelength range, compared to the reference one. The c-Si solar cell integrated with CuO NLs generates the graded index of refraction between the surface of Si and air, and improves the light utilization efficiency by increasing the light-trapping effect and forming resonant optical modes, which leads to multiple scattering of the incident light. In addition, the deposition of p-type CuO NLs on the surface of the Si wafer can form a CuO NL/c-Si junction and generate a built-in potential, which is beneficial for the separation of photogenerated electrons and holes, leading to the minority carrier lifetime (seff) increase from 5.7 to 15.0 mu s. The CuO NL/c-Si structure reduces the optical loss, improves the carrier collection, and distinctly enhances the c-Si solar cell efficiency. The experimental results indicate that short-circuit current and power conversion efficiency of CuO NL/c-Si solar cells increase by 10.30% and 17.90%, respectively. The CuO NL/c-Si structure is expected to exceed the Shockley-Queisser limit of the single junction solar cells.
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