In:
Materials Chemistry Frontiers, Royal Society of Chemistry (RSC), Vol. 7, No. 11 ( 2023), p. 2241-2250
Abstract:
To date, the most efficient metal halide perovskite solar cells employ an n–i–p architecture that uses a 2,2,7′,7′-tetrakis( N , N -di- p -methoxyphenylamine)-9,9′-spirobifluorene (spiro-OMeTAD) as the hole-transporting material (HTM), which achieves optimum conductivity with the addition of lithium bis(trifluoromethane)sulfonimide (LiTFSI) and air exposure. However, the instability caused by these additives limits the further development of PSCs toward commercialization. Here, we designed and synthesized a novel HTM, 9-(4-((2-ethylhexyl)oxy)phenyl)- N 2 , N 2 , N 7 , N 7 -tetrakis(4-methoxyphenyl)-9 H -carbazole-2,7-diamine (SC-2), and oxidized SC-2 was synthesized to dope SC-2 to replace the conventionally used spiro-OMeTAD system. The film conductivity, morphology, and solar cells were optimized by varying the doping content. As a result, a champion efficiency of 21.3% under AM 1.5G 1- sun irradiation is achieved, which is one of the best efficiencies of the HTL doped by its pre-oxidized salt. The non-encapsulated cells based on doped SC-2 retained 95% of their initial performance after aging for 1450 h (ISOS-D-1), which is better than those of the cells based on doped spiro-OMeTAD ( ca. 77%) and doped EH44 ( ca. 76%). In addition, an efficiency of 14.6% is demonstrated for perovskite solar modules of 5 cm × 5 cm in size using a 10.0 cm 2 aperture area under AM 1.5G irradiation based on this new HTM.
Type of Medium:
Online Resource
ISSN:
2052-1537
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2867881-3
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