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A non-aggregated Zn(II)octa(2,6-diphenylphenoxy) phthalocyanine (coded as TT80) has been used as a hole-transporting material for perovskite solar cells. The cells were fabricated under three different configurations by changing the uptake solvent (chlorobenzene or toluene) and incorporating additives (bis(trifluoromethane) sulfonimide lithium salt (LiTFSI) and 4-tert-butylpyridine (TBP). A power conversion efficiency of 6.7% (AM1.5G standard conditions) was achieved for the best cell under optimized configuration.
Michael Graetzel, Shaik Mohammed Zakeeruddin, Felix Thomas Eickemeyer
Michael Graetzel, Jacques-Edouard Moser, Etienne Christophe Socie, George Cameron Fish, Aaron Tomas Terpstra