Suppressing surface and interface recombination to afford efficient and stable inverted perovskite solar cells.

The top surface of the perovskite layer and the interface with the electron transporting layer play a key role in influencing the performance and operational stability of inverted perovskite solar cells (PSCs). A deficient or ineffective surface passivation strategy at the perovskite/electron transport layer interface can significantly impact the efficiency and scalability of PSCs. This study introduces phenyl dimethylammonium iodide (PDMAI) as a passivation ligand that exhibits improved chemical and field-effect passivation at the perovskite/C interface.

MACl-Induced Intermediate Engineering for High-Performance Mixed-Cation Perovskite Solar Cells.

Recently, mixed-cation perovskites have been extensively used for high-performance solar cells. Nevertheless, the mixed-cation perovskite based on formamidinium methylammonium lead tri-iodide (FAMAPbI) fabricated through the existing methods often suffers from phase stability and trap density. Herein, we demonstrate a facile intermediate engineering approach to improve the quality of the mixed-cation perovskite based on FAMAPbI.

Template-Assisted Formation of High-Quality α-Phase HC(NH)PbI Perovskite Solar Cells.

Formamidinium (FA) lead halide (α-FAPbI) perovskites are promising materials for photovoltaic applications because of their excellent light harvesting capability (absorption edge 840 nm) and long carrier diffusion length. However, it is extremely difficult to prepare a pure α-FAPbI phase because of its easy transformation into a nondesirable δ-FAPbI phase. In the present study, a "perovskite" template (MAPbI-FAI-PbI-DMSO) structure is used to avoid and suppress the formation of δ-FAPbI phases.

Low-Temperature Annealed Perovskite Films: A Trade-Off between Fast and Retarded Crystallization via Solvent Engineering.

Currently, in the field of photovoltaics, researchers are working hard to produce efficient, stable, and commercially feasible devices. The prime objective behind the innovation of any photovoltaic device is to yield more energy with easy manufacture and less process cost. Perovskite solar cells (PSCs) are prominent in the field of photovoltaics, owing to its low material cost, simple fabrication process, and ideal optoelectronic properties.