Data for: Efficient ITO-free semitransparent perovskite solar cells with metal transparent electrodes
In parallel with soaring efficiency, interest in multi-functional and aesthetic semitransparent PeSCs has emerged for their special applications such as power generating window and combination with typical inorganic solar cells for highly efficient tandem cells. Typically, planar heterojunction architecture is considered as better candidate for semitransparent applications owing to its higher optical transparency and lower scattering comparing to mesoporous oxide based PeSCs. Among various device configurations, we investigated p-i-n structured PeSCs consisting with thin Cu or Ni transparent electrode/hole transport layer (HTL)/CH3NH3PbI3/[6,6]-phenyl-C61 butyric acid methyl ester (PCBM)/top electrode to demonstrate air-stable as well as efficient ITO-free semitransparent PeSCs. Ultra thin Cu and Ni, which are well-known non-precious metals having sufficient electrical conductivity and high workfunction, were studied as ITO-alternatives and optimization of devices was systematically carried out. Semitransparent PeSC fabricated on Ni /NiOX exhibited the average visible transmittance (AVT) of 22 % and PCE of 8.20 % (Opaque and semitransparent ITO based PeSCs showed PCE of 12.27 % and 9.19 %, respectively). Here, because thin perovskite layer of ~120 nm was used to ensure sufficient transparency, PCE is relatively low compared to the best recorded value. Considering required AVT for the application of power-generating window of ~25 % and recent reports on the semitransparent PeSCs, this result is one of the best performances reported to date.