期刊
NANOMATERIALS
卷 11, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/nano11061522
关键词
CdTe nanocrystals; blade coating; large area fabrication
类别
资金
- Key-Area Research and Development Programof Guangdong Province [2019B010924001]
- National Natural Science Foundation of China [21875075, 61774077, 61274062, 61775061]
- GuangdongNatural Science Fund [2018A0303130041, 2018A0303130211]
- Guangzhou Science and Technology Plan Project [2018A0303130211, 201804010295]
- National Undergraduate Innovative and Entrepreneurial Training Program [202010561010]
- Fundamental Research Funds for the Central Universities
CdTe semiconductor nanocrystal solar cells with low-cost fabrication process have been prepared using a novel blade coating technique under ambient conditions, showing significantly improved power conversion efficiency. The blade-coated NC solar cells require lower post-treatment temperatures compared to conventional spin-coated devices, and exhibit high stability under ambient conditions for over 18 days, promising for low-cost, roll-to-roll, and large area industrial fabrication.
CdTe semiconductor nanocrystal (NC) solar cells have attracted much attention in recent year due to their low-cost solution fabrication process. However, there are still few reports about the fabrication of large area NC solar cells under ambient conditions. Aiming to push CdTe NC solar cells one step forward to the industry, this study used a novel blade coating technique to fabricate CdTe NC solar cells with different areas (0.16, 0.3, 0.5 cm(2)) under ambient conditions. By optimizing the deposition parameters of the CdTe NC's active layer, the power conversion efficiency (PCE) of NC solar cells showed a large improvement. Compared to the conventional spin-coated device, a lower post-treatment temperature is required by blade coated NC solar cells. Under the optimal deposition conditions, the NC solar cells with 0.16, 0.3, and 0.5 cm(2) areas exhibited PCEs of 3.58, 2.82, and 1.93%, respectively. More importantly, the NC solar cells fabricated via the blading technique showed high stability where almost no efficiency degradation appeared after keeping the devices under ambient conditions for over 18 days. This is promising for low-cost, roll-by-roll, and large area industrial fabrication.
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