Low cost copper phthalocyanine has been used as hole-transporting material for the construction of organolead halide solid state perovskite solar cells.

Non planar 14 -π aromatic subphthalocyanine has been introduced for the first time as hole transporting material for organometal halide perovskite solar cells and achieved a power conversion efficiency of 6.6%. Cells stored in the dark under ambient conditions underwent an incubation period of nine days during which, we observed an increase in efficiency followed by slow progressive deterioration. However, Raman spectral analysis of pristine perovskite deposited on titania revealed a much faster degradation thus indicating that the subphthalocyanine layer provides a temporary protection to the underlying perovskite layer.The Raman spectra of PbCl 2 and CH 3 NH 3 I precursors are given in Figure 7. Both spectra were collected under inert atmosphere. The Raman spectrum of the CH 3 NH 3 PbCl x I 3-x perovskite at ambient conditions is also given in the same figure for comparison. It was collected using 0.8 mW laser power, which is a considerably high value for photosensitive materials. The peaks at 515, 397 and 144 cm -1 are attributed to TiO 2 (anatase) substrate and the fact that they appear in the spectrum suggests that the laser power is adequate for the photons to reach the substrate and the inelastically scattered light subsequently to reach the

In this article, we have designed and synthesized a porphyrin with the following molecular architecture A-π-D-π-A in which ethyl rhodanine end capping groups were linked to the core porphyrin donor via an octyl thiophene-ethynylene π bridge denoted as VC117 and used it as an electron donor along with ([6,6] The higher value of J sc is explained by the increased absorption profile of the blend, the higher incident photon to current efficiency (IPCE) response and the better crystallinity of the active layer when processed with solvent additives and thermal annealing while the enhancement of FF is due to the better charge transport capability and the charge collection efficiency of the latter device.