Nature inspiring processing route toward high throughput production of perovskite photovoltaics

Abstract

We report our results of developing perovskite thin films with high coverage, improved uniformity and preserved crystalline continuity in a single pass deposition.

Structurally Deformed MoS2for Electrochemically Stable, Thermally Resistant, and Highly Efficient Hydrogen Evolution Reaction

“…Although continuous modulation of ∆ G H toward thermal neutral can be made possible by mounting up the number of S‐vacancies, the overall structural integrity of ce‐MoS 2 sheets is at the mercy of fragmentation. To further modulate the ∆ G H of ce‐MoS 2 sheets while preserving the structural integrity, we have adapted the EHD process, which is typically employed for generating ultrafine droplets in high throughput thin film production (Scheme S1, Supporting Information; Figure d) . Under a high electric field, the liquid medium deforms and then disintegrates into self‐dispersing, charged droplets, providing electrostatically stabilized colloidal systems that inhibit ce‐MoS 2 sheets from restacking.…”

Highly Efficient Perovskite Solar Cells Using Non‐Toxic Industry Compatible Solvent System

“…However, apart from the crystallization kinetics, the wettability of applied inks on the underlying substrates also affects the uniformity of perovskite films. Due to the relatively high surface tension of the pure‐DMSO precursor solution (Table S2, Supporting Information), drying patterns such as surface rippling and coffee rings were often observed after the spin coating, which makes it even less applicable for large‐scale coating techniques. As a result, devices made from pure DMSO solution show lower performance compared to DMF based devices (Table ).…”

Interphases, Interfaces, and Surfaces of Active Materials in Rechargeable Batteries and Perovskite Solar Cells

“…Thus, the current and future efforts focus on controlling and passivating the interfaces of carrier transport and halide perovskite layers, including: a) adjusting and balancing the band gap structure for more suitable energy level; b) increasing the charge mobility of carrier transport layers for better charge extraction and collection; c) passivating surface defects and traps of perovskites to reduce charge recombination; d) introducing an interlayer to protect perovskite from moisture, oxidation, and photoactive reaction. Commercialization of halide perovskite films will be vitally important, but the scalable fabrication processes, like spray coating,330–332 blading,333,334 and pressure processing methods335,336 cannot obtain high efficiency PSCs as well as the lab‐scale devices fabricated by spin‐coating method. We speculate that the more defects exist at the interface between each layer due to the nonuniformity of the scalable methods.…”