%0 Journal Article %1 doi:10.1021/acsenergylett.7b00614 %A Pellaroque, Alba %A Noel, Nakita K. %A Habisreutinger, Severin N. %A Zhang, Yadong %A Barlow, Stephen %A Marder, Seth R. %A Snaith, Henry J. %D 2017 %J ACS Energy Letters %K doping efficiency perovskite stability %N 9 %P 2044-2050 %R 10.1021/acsenergylett.7b00614 %T Efficient and Stable Perovskite Solar Cells Using Molybdenum Tris(dithiolene)s as p-Dopants for Spiro-OMeTAD %U http://dx.doi.org/10.1021/acsenergylett.7b00614 %V 2 %X 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.

@article{doi:10.1021/acsenergylett.7b00614, abstract = { 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. }, added-at = {2017-09-18T14:28:48.000+0200}, author = {Pellaroque, Alba and Noel, Nakita K. and Habisreutinger, Severin N. and Zhang, Yadong and Barlow, Stephen and Marder, Seth R. and Snaith, Henry J.}, biburl = {https://www.bibsonomy.org/bibtex/25aff0eb4066337b95355dd56ea50d489/fabianopkm}, doi = {10.1021/acsenergylett.7b00614}, eprint = {http://dx.doi.org/10.1021/acsenergylett.7b00614}, interhash = {f7cdcbd7cba22574954feb3a8236fe8f}, intrahash = {5aff0eb4066337b95355dd56ea50d489}, journal = {ACS Energy Letters}, keywords = {doping efficiency perovskite stability}, number = 9, pages = {2044-2050}, timestamp = {2017-09-18T14:28:48.000+0200}, title = {Efficient and Stable Perovskite Solar Cells Using Molybdenum Tris(dithiolene)s as p-Dopants for Spiro-OMeTAD}, url = {http://dx.doi.org/10.1021/acsenergylett.7b00614}, volume = 2, year = 2017 }