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兰州交通大学 光电技术与智能控制教育部重点实验室,甘肃 兰州,730070
纸质出版日期:2016-1-10,
收稿日期:2015-9-18,
修回日期:2015-11-10,
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李建丰, 赵创, 张恒等. 利用PVP添加剂提高钙钛矿太阳能电池光伏性能[J]. 发光学报, 2016,37(1): 56-62
LI Jian-feng, ZHAO Chuang, ZHANG Heng etc. Enhancement of The Photovoltaic Performance of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite Solar Cells by Using Polyvinylpyrrolidone Additive[J]. Chinese Journal of Luminescence, 2016,37(1): 56-62
李建丰, 赵创, 张恒等. 利用PVP添加剂提高钙钛矿太阳能电池光伏性能[J]. 发光学报, 2016,37(1): 56-62 DOI: 10.3788/fgxb20163701.0056.
LI Jian-feng, ZHAO Chuang, ZHANG Heng etc. Enhancement of The Photovoltaic Performance of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite Solar Cells by Using Polyvinylpyrrolidone Additive[J]. Chinese Journal of Luminescence, 2016,37(1): 56-62 DOI: 10.3788/fgxb20163701.0056.
研究了聚乙烯吡络烷酮( PVP) 作为添加剂对CH
3
NH
3
PbI
3
钙钛矿基太阳能电池光电性能的影响。通过SEM、XRD和UV-Vis等手段
研究了不同浓度PVP掺杂CH
3
NH
3
PbI
3
钙钛矿前驱体对薄膜的表面形貌、结晶度和光学性能的影响。结果表明
少量的PVP添加可以调控钙钛矿薄膜的质量
添加了PVP的钙钛矿薄膜的吸收性能明显得到提高
且吸收峰红移了20 nm;同时
不仅增加了CH
3
NH
3
PbI
3
的结晶度
而且还明显提高了钙钛矿薄膜的覆盖率
减少了钙钛矿薄膜中的针孔结构。在CH
3
NH
3
PbI
3
前驱体溶液中添加质量分数为1%的PVP
得到的钙钛矿太阳能电池的能量转换效率达到8.38%。与未加PVP 的标准电池器件效率(1.30%)相比
效率提高了544%。这些结果表明
通过添加剂来调控一步法CH
3
NH
3
PbI
3
的晶体生长和薄膜形貌来获取高性能的钙钛矿太阳能电池是很有前途的。
We demonstrate a new one-step solution approach to prepare perovskite CH
3
NH
3
PbI
3
films by adding polyvinylpyrrolidone (PVP) to the standard CH
3
NH
3
PbI
3
precursor solution. The film morphologies
crystallinities
and optical properties of CH
3
NH
3
PbI
3
perovskite layers are carefully studied by SEM
XRD
and UV-Vis. The results reveal that the perovskite film properties can be manipulated by incorporating a small amount of PVP. The absorbance of the film with PVP additive is significantly higher than the pristine film and the absorption peak is red shift by 20 nm
indicating the perovskite film with additive possessing better crystal structures. The use of PVP strongly affects the crystallization process of forming pure CH
3
NH
3
PbI
3
and helps the formation of smooth film
leading not only to enhanced crystallization of CH
3
NH
3
PbI
3
but also to significantly improved coverage of CH
3
NH
3
PbI
3
on a planar substrate. The optimized power conversion efficiency (PCE) of CH
3
NH
3
PbI
3
solar cells improved from 1.30% to 8.38% for the planar cell structure after the addition of 1% mass fraction of PVP. These results suggest that this new one-step solution approach is promising for controlling CH
3
NH
3
PbI
3
growth to achieve high-performance perovskite solar cells.
钙钛矿太阳能电池聚乙烯吡咯烷酮添加剂
perovskite solar cellspolyvinylpyrrolidoneadditive
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