“…Huang and co‐workers grew CH 3 NH 3 PbI 3 film on a wide range of wetting and nonwetting HTMs, including polyvinyl alcohol (Figure 5), PEDOT:PSS, cross‐linked N4,N4′‐bis(4‐(6‐((3‐ethyloxetan‐3‐yl)methoxy) hexyl)phenyl)‐N4,N4′‐diphenylbiphenyl‐4,4′‐diamine (C‐OTPD), PTAA, and (N‐9′‐heptadecanyl‐2,7‐carbazole‐alt‐5,5‐(4′,7′‐di‐2‐thienyl‐2′,1′,3′‐benzothiadiazole)) (PCDTBT, Figure 5). 105 With the increased nucleus spacing and the facilitated grain boundary migration in grain growth, the charge recombination in perovskite film on nonwetting HTMs was reduced. As a result, high stabilized device efficiencies of 18.3% and 17.8% were obtained, respectively, based on tetrafluoro‐tetracyanoquinodimethane (F4‐TCNQ) doped PTAA and C‐OTPD HTMs.…”