Fabrication of perovskite solar cells in ambient air by employing poly (triarylamine) as the hole transport layer

Poly --(triarylamine) ( was employed as the hole transport layer s (HTL s ) to fabricate perovskite solar cells ( in ambient air wherein the temperature and relative humidity were controlled at 30 and 30%, respectively. In comparison to PSC s based on spiro OMeTAD HTL s the statistical power conversion efficiency (PC E) of ambient air fabricated solar cells was close to solar cell s which were fabricated in nitrogen . It indicate d the PTAA layer s w ere less sensitive in air than that of spiro OMeTAD during the fabrication process The PCE was around 12% in average for PS C s with PTAA HTLs. Additionally , i t was found that oxygen aging can further improve the PCE to 1 4 % in However…