Boosting perovskite nanomorphology and charge transport properties via a functional D–π-A organic layer at the absorber/hole transporter interface

Abstract

<p>The coating of perovskites with D35 improves the performance of PSCs. D35 plays a versatile functional role.</p>

Resonant Molecular Modification for Energy Level Alignment in Perovskite Solar Cells

“…Certified power conversion efficiencies of perovskite solar cells (PSCs) have surged from 3.8% to 25.7% in ten years, which makes them one of the most promising candidates for photovoltaic applications. − Although there has been an unparalleled enhancement in photovoltaic performance, the degradation caused by various stimuli is still a key challenge in the commercialization of PSCs. , Degradation of PSCs usually starts at the perovskite–hole transport (HTL) and perovskite–electron transport (ETL) interfaces because of the high intrinsic defect density of perovskites and the mismatched energy-level alignment at the interfaces between different layers. − Significant efforts to inhibit degradation include contact layer modification, − defect passivation, − and encapsulation . The use of organic molecules as the interfacial passivation layer has great potential to address the surface defects and facilitate charge extraction. − …”

Thiazole‐Modified C3N4 Interfacial Layer for Defect Passivation and Charge Transport Promotion in Perovskite Solar Cells

“…When the C 3 N 4 layer is modified by thiophene or thiazole, the defect passivation effect in the presence of thiophene and thiazole can be conducive to inhibit the nonradiative recombination of carriers, so the corresponding carrier lifetime is extended to a certain extent. [ 32,33 ] The corresponding average lifetimes of the four samples are summarized in Table S1, Supporting Information. A schematic diagram of the interaction between the perovskite layer and the intermediate layer together with the chemical structure of C 3 N 4 is shown in Figure .…”

The evolution of triphenylamine hole transport materials for efficient perovskite solar cells

“…The ability of the D35-based solar cells to maintain 83% of their original efficiencies in the dark after 37 days of aging under open circuit (OC) conditions highlights their excellent stability. 96 The preparation of both perovskite films and hole-transfer layers in PSCs via an ''all evaporation'' method was reported by Dong and co-workers in 2020. In this respect, the sequential flash-evaporation of PbI 2 and MAI films afforded homogeneous MAPbI 3 films with large surface areas, accomplished via a ''solidsolid'' reaction during the post-annealing process.…”

“…The ability of the D35 -based solar cells to maintain 83% of their original efficiencies in the dark after 37 days of aging under open circuit (OC) conditions highlights their excellent stability. 96…”