Fabrication of Perovskite Quantum Dot Solar Cells with PEDOT:PSS and Poly-TPD as Charge Transport Layers

PEDOT:PSS solution was spin-coated onto an ITO substrate at 4000 rpm to form a dense film, followed by annealing at 130°C for 20 min. A 8 mg/ml Poly-TPD solution in chlorobenzene was then spin-coated onto the PEDOT:PSS layer at 4000 rpm and annealed at 120°C for 10 min as the hole transfer layer. CsPbBr3 quantum dot layer was spin-coated onto the Poly-TPD layer in a glove box at 2000 rpm. Finally, a 40 nm TPBi layer, a 1 nm LiF layer, and a 100 nm Al electrode were thermally evaporated.