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Mixed ion perovskite solar cells (PSC) are manufactured with a metal-free hole contact based on press-transferred single-walled carbon nanotube (SWCNT) film infiltrated with 2,2,7,-7-tetrakis(N, N-di-p-methoxyphenylamine)-9,90-spirobifluorene (Spiro-OMeTAD). By means of maximum power point tracking, their stabilities are compared with those of standard PSCs employing spin-coated Spiro-OMeTAD and a thermally evaporated Au back contact, under full 1 sun illumination, at 60 degrees C, and in a N-2 atmosphere. During the 140 h experiment, the solar cells with the Au electrode experience a dramatic, irreversible efficiency loss, rendering them effectively nonoperational, whereas the SWCNT-contacted devices show only a small linear efficiency loss with an extrapolated lifetime of 580 h.
Shaik Mohammed Zakeeruddin, Felix Thomas Eickemeyer, Minhuan Wang, Mingkui Wang, Mingyang Wei
Shaik Mohammed Zakeeruddin, Ursula Röthlisberger, Felix Thomas Eickemeyer, Virginia Carnevali, Nikolaos Lempesis, Lorenzo Agosta, Mingyang Wei, Yi Yang