Three p-type small molecules (CL-1–3) based on tetraphenylethylene as the core and different π-conjugation diarylamines as linkers are synthesized. The bilayer HTL of the NiOx/CL-3-based cell exhibits the best power conversion efficiency of 20.15%.
A new squaraine-based 2D conjugated polymer was developed as the donor material in polymer solar cells and dopant-free hole transporting material in inverted perovskite solar cells, reaching efficiencies of 6.35% and 18.29%, respectively.
Preparing organic–inorganic hybrid perovskite films by deploying vacuum-based methods, which are widely used for industrial thin-film deposition, is expected to promote the commercialization of perovskite solar cells.
Two Low-Cost and Efficient Hole-Transporting Materials for n–i–p Type Organic–Inorganic Hybrid Perovskite Solar Cells