Solution-processed CuO as an efficient hole-extraction layer for inverted planar heterojunction perovskite solar cells

Inverted Perovskite Solar Cells Based on Small Molecular Hole Transport Material C8‐Dioctylbenzothienobenzothiophene

“…PEDOT:PSS film (10.7°), unannealed C 8 ‐BTBT film (14.0°) and C 8 ‐BTBT (100 °C) film (12.2°), indicating the formation of hydrophobic surface on the substrate. It is suggested that the improvement of the film morphology can be ascribed to the hydrophobic surface of the 150 °C annealed C 8 ‐BTBT film, similar to the earlier study . Different from the hydrophilicity of the unannealed and 100 °C annealed C 8 ‐BTBT, increasing the annealing temperature up to 150 °C makes C 8 ‐BTBT hydrophobic, which could be attributed to the surface enrichment of the hydrophobic C 8 H 17 chain.…”

“…Moreover, it is also noteworthy that acidity of PEDOT:PSS might lead to the corrosion of electron . To address this issue, polymeric material such as poly(bis(4‐phenyl)(2,4,6‐trimethylphenyl)amine) (PTAA), and inorganic material such as CuO x , CuSCN, NiO x , were used to replace PEDOT:PSS.…”

Halide perovskites: current issues and new strategies to push material and device stability

“…Similarly, other organic HTMs such as P3HT (poly(-hexylthiophene)) or PTAA (Poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine]) are unlikely to survive 25 years of operation in the field, and besides are way too expensive for mass production. For these reasons, researchers have been looking at inorganic HTMs such as doped and undoped NiO x [45][46][47], Cu 2 O and CuO [48,49], CuI [50,51] and CuSCN [52,53], and obtained high efficiencies, albeit somewhat lower than with organic HTMs. For p-i-n configurations, inorganic ETL such as SnO 2 and ZnO have been proposed.…”

Novel approaches and scalability prospects of copper based hole transporting materials for planar perovskite solar cells

“…22), replacing BCP and C 60 , has led to an increase in the PCE of CuO x CH 3 NH 3 PbI 3 PSCs, which reached 17.43%. 135 By switching to a mixed halide perovskite, MAPbI 3Àx Cl x , an impressive PCE of 19% was achieved by Rao et al 136 The perovskite that was used in that work is MAPbI 3Àx Cl x , with various Cl doping proportions, while a PCBM (phenyl-C 61 -butyric acid methyl ester)/C 60 double fullerene layer was deposited as an electron acceptor and collection layer. Finally, a thin film of bathocuproine (BCP) and a silver layer were thermally evaporated as the hole blocker and anode, respectively.…”