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Efficient and Stable Perovskite Solar Cells Using Molybdenum Tris(dithiolene)s as p-Dopants for Spiro-OMeTAD
ACS Energy Letters ( IF 19.3 ) Pub Date : 2017-08-17 00:00:00 , DOI: 10.1021/acsenergylett.7b00614
Alba Pellaroque 1 , Nakita K. Noel 1 , Severin N. Habisreutinger 1 , Yadong Zhang 2 , Stephen Barlow 2 , Seth R. Marder 2 , Henry J. Snaith 1
Affiliation  

Metal halide perovskite solar cells have now reached efficiencies of over 22%. To date, the most efficient perovskite solar cells have the n-i-p device architecture and use 2,2′,7,7′-tetrakis(N,N′-di-p-methoxyphenylamine)-9,9′-spirobifluorene or poly(triarylamine) as the hole transport material (HTM), which are typically doped with lithium bis((trifluomethyl)sulfonyl)amide (Li-TFSI). Li-TFSI is hygroscopic and detrimental to the long-term performance of the solar cells, limiting its practical use. In this work, we successfully replace Li-TFSI by molybdenum tris(1-(methoxycarbonyl)-2-(trifluoromethyl)ethane-1,2-dithiolene), Mo(tfd-CO2Me)3, or molybdenum tris(1-(trifluoroacetyl)-2-(trifluoromethyl)ethane-1,2-dithiolene), Mo(tfd-COCF3)3. With these two dopants, we achieve stabilized power conversion efficiencies up to 16.7% and 15.7% with average efficiencies of 14.8% ± 1.1% and 14.4% ± 1.2%, respectively. Moreover, we observe a significant enhancement of the long-term stability of perovskite solar cells under 85 °C thermal stressing in air.

中文翻译:

使用三(二硫代钼)钼作为Spiro-OMeTAD的p型掺杂剂的高效稳定的钙钛矿太阳能电池

如今,金属卤化物钙钛矿太阳能电池的效率已超过22%。迄今为止,最有效的钙钛矿太阳能电池具有压区装置架构,并使用2,2',7,7'-四(N,N'-二-甲氧基苯胺)-9,9'-螺二芴或聚三芳基胺)作为空穴传输材料(HTM),通常掺有双((三氟甲基)磺酰基)氨基锂(Li-TFSI)。Li-TFSI具有吸湿性,并且不利于太阳能电池的长期性能,从而限制了其实际应用。在这项工作中,我们成功地用三(1-(甲氧基羰基)-2-(三氟甲基)乙烷-1,2-二硫代己烯)钼,Mo(tfd-CO 2 Me)3或三(1-钼)取代Li-TFSI (三氟乙酰基)-2-(三氟甲基)乙烷-1,2-二硫辛烯),Mo(tfd-COCF33。使用这两种掺杂剂,我们可以实现高达16.7%和15.7%的稳定功率转换效率,平均效率分别为14.8%±1.1%和14.4%±1.2%。此外,我们观察到在空气中85°C的热应力下钙钛矿型太阳能电池的长期稳定性有了显着提高。
更新日期:2017-08-17
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