Fully organic dye based tandem photovoltaic cells

Recent advances in subphthalocyanines and related subporphyrinoids

“…, interconnecting layer composition, buffers, or layer thicknesses) on the V oc of both each sub-cell and the whole tandem device. 456–458…”

“…By these simple architectures and optimizing each single junction sub-cell separately, the authors explored the impact of different factors (i.e., interconnecting layer composition, buffers, or layer thicknesses) on the V oc of both each sub-cell and the whole tandem device. [456][457][458] Zhang and co-workers also studied the composition of the interconnecting layer, also referred as charge recombination zone, by connecting in a tandem mode 20/C 60 and ClAlPc/C 60 planar heterojunctions. 459 Specifically, the authors compared the efficiency of BCP and 3,4,9,10 perylenetetracarboxylic bisbenzimidazole as electron transporting layer, and evaluated the role of Ag layer thickness on the device performance.…”

“…603 Functionalizing at the six b-pyrrole positions with ethyl groups (SubP 412) or fusing benzene rings at the same positions (BzSubP 387) also reduces the SubP bowl depths (1.43 Å and 1.32 Å, respectively). The corresponding mesotriphenyl-substituted SubPs 411 and 388 are still shallower (1.16 and 1.18 Å, respectively), reflecting the smaller curvatures of SubPs fully substituted at both meso-and b-positions (see Table 24 SubPs 411,h,457,459,455,460,461,462,463 and 388). In this respect, compound 461, containing three mesophenyl substituents and six tert-butylsulfanyl groups at the b-positions, shows a curvature of 1.04 Å, 611 which represents the smallest bowl-depth among all the reported neutral SubPs.…”