Recently, Wang Kaihe, an associate researcher from the thin-film solar cell research group at the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, collaborated with a team to develop high-performance large-area perovskite solar cell modules using slit coating preparation technology. They also combined this approach with a surface redox strategy for vacuum-deposited nickel oxide films.
Currently, the photoelectric conversion efficiency of lab-sized perovskite solar cells has exceeded 25%. Preparing large-area perovskite batteries and advancing their commercialization have become key goals in this field. While perovskite batteries are known for their compatibility with solution-based preparation methods, challenges arise when scaling up. For instance, preparing a uniform, non-porous large-area charge transport layer thinner than 100 nanometers using a solution method proves difficult. In contrast, vacuum deposition technology offers better control and is better suited for creating ultra-thin, large-area films. Consequently, the team explored a hybrid strategy that merges a vacuum-prepared charge transport layer with a solution-prepared perovskite layer.
However, during their experiments, they discovered that the hydrophobic nature of the vacuum-deposited nickel oxide hole transport layer hindered the adhesion of the perovskite precursor liquid. Additionally, high-valent nickel ions on the nickel oxide surface degraded perovskites, forming an interface barrier and causing non-capacitor hysteresis effects, which negatively impacted both device performance and stability.
To address these challenges, the team introduced a simple surface redox engineering (SRE) method to modify the surface properties of the electron-beam-evaporated nickel oxide films. Their findings revealed that SRE significantly enhanced the wettability of the nickel oxide surface, ensuring its compatibility with both vacuum and solution-based preparation techniques. Moreover, by carefully balancing the ratio of nickel ions in various valence states on the surface of the nickel oxide thin films, they improved the electrical performance of the nickel oxide/perovskite interface and enhanced overall interface stability. Small-area flexible and rigid substrate devices achieved efficiencies of 23.4% and 21.3%, respectively, with excellent stability. Leveraging previous work (Advanced Materials, 2020), they also successfully fabricated large-area perovskite battery modules on a 156×156 mm² substrate, achieving an energy conversion efficiency of 18.6% with remarkable stability. This surface redox engineering approach opens new possibilities for combining vacuum-prepared charge transport layers with solution-prepared perovskites, potentially accelerating the advancement of efficient and stable perovskite solar cell modules.
The research results were recently published in Joule under the title "Surface Redox Engineering of Vacuum-Deposited NiOx for Top-Performance Perovskite Solar Cells and Modules."
[Image descriptions:
A schematic diagram showcasing the surface redox engineering process.
A photograph of the fabricated perovskite solar cell modules.]
Sanitary End Caps
Kaysen is a China manufaturer and supplier of Sanitary Clamp Solid End Caps through 1/2″ to 8″(DN10-DN200), with standard 3A, DIN, SMS, ISO, IDF, RJT with favorable price. Sanitary Clamp Solid End Caps made in stainless steel 304 and 316L by CNC machine, with various types and design to meet different pressure and usage. The Sanitary Clamp Solid End Caps could be fabricated as per client`s requirement and drawing. Welcome to buy Sanitary Clamp Solid End Caps, DIN/SMS/3A Sanitary Clamp Solid End Caps, Sanitary Solid End Caps from us in wholesale price, if you have any questions or requests, pls feel free to contact us!
Sanitary Clamp Solid End Caps – Stainless Steel Sanitary and Hygienic Fittings:
▪ Size: 1/2″ - 8″ (DN10-DN200)
â–ª Material: SS304, SS316L, EN 1.4301, EN 1.4404 etc.
â–ª Standard: 3A, DIN, SMS, ISO, RTJ, IDF,etc.
â–ª Connection Type: Clamped
â–ª Application: Food, Petroleum, Dairy, Pharmacy, Beer, Beverage, Biotech, Cosmetics etc.
Sanitary End Caps,Sanitary Solid End Cap,Sanitary Clamp Solid End Cap,Sanitary Camp End Cap
Kaysen Steel Industry Co., Ltd. , https://www.chinasanitaryvalve.com