Double Fence Porphyrins that are Compatible with Cobalt(II/III) Electrolyte for High‐Efficiency Dye‐Sensitized Solar Cells

Abstract

AbstractA series of new double fence porphyrin dyes bJS1–bJS3, with eight long alkoxyl chains attached to four β‐phenyl groups, have been designed and synthesized. The single fence meso‐substituted counterparts mJS1–mJS3 were also prepared as reference dyes. Dyes bJS1–bJS3 and mJS1–mJS3 exhibit power conversion efficiencies of 8.03–10.69 % and 2.33–6.69 %, respectively. Based on photovoltaic studies, the remarkable cell performance of double fence porphyrin sensitizers can be attributed to reduced dye aggregation and a decreased charge‐recombination rate. Notably, porphyrins bJS2 and bJS3 exhibit better efficiency than the benchmark YD2‐o‐C8 (9.83 % in this work), demonstrating that the double fence structure is a promising design strategy for efficient porphyrin sensitizers in high‐performance DSSCs.