posted on 2023-11-03, 17:06authored byNaba K. Rana, Tapas Das, Parul Garg, Ashok Bera, Asim Guchhait
The
development of ambient stable and large-area inorganic–organic
hybrid perovskite solar cells (PvSCs) is necessary to translate the
technology into our daily life. The concerning issue is that the materials
are easily degradable and need proper attention toward the degradation
mechanism. A polymer material, PTAA, can be used for the hole transporting
layer (HTL) of the PvSCs, which may have better stability. This work
focuses on the impact of the polymer PTAA on the stability of mesoporous
n–i–p structured RbCs(MAFA)PbI3–PvSCs
while using silver (Ag) as a top electrode and, in other cases, gold
(Au) as the top electrode. Comparing the device performance with two
different electrodes (Ag and Au) over small (0.25 cm2)
and large areas (1.0 cm2), the critical role of the HTL
material in the stability and performance of a fabricated device has
been demonstrated here. The PTAA/Ag and PTAA/Au combination-based
devices showed almost the same performance. The unencapsulated Ag
electrode-based RbCs(MAFA)PbI3–PvSCs yielded a power
conversion efficiency (PCE) of 10.29% over a 0.25 cm2 active
area. The fabricated device retains over 50% of its initial efficiency
after 2000 h of storage in ambient conditions. At the same time, the
PTAA/Au combination-based device showed better stability in ambient
conditions. We chose the PTAA/Ag combination as a winner as it could
provide a fast, easy, and cost-effective method for developing highly
efficient, stable PvSCs.