Recently, a significant breakthrough has been achieved by Zhou Huiqiong's research group at the National Nanoscience Center of the Chinese Academy of Sciences in the field of stress-suspended release regulation for quasi-two-dimensional perovskite materials. The study, titled "Impact of Strain Relaxation on 2D Ruddlesden-Popper Perovskite Solar Cells," was published online in Angewandte Chemie International Edition.
Perovskite solar cells represent one of the most promising third-generation thin-film photovoltaic technologies, known for their superior photoelectric properties and cost-effectiveness. As device efficiencies continue to rise, stability has emerged as a critical factor limiting commercialization. While packaging can enhance device stability under external stress, improving the intrinsic stability of perovskite materials remains a pressing need.
Compared to traditional three-dimensional perovskites, the incorporation of hydrophobic spacers has enhanced the stability of quasi-two-dimensional perovskites, yet challenges remain. Residual stress within these materials plays a crucial role in determining their photoelectric properties and long-term stability. The research team utilized X-ray diffraction (XRD) and atomic force microscopy (AFM) to analyze residual stress in quasi-two-dimensional perovskite systems incorporating various spacers. Their findings revealed severe out-of-plane tensile stresses in films based on phenethylammonium, leading to poor crystallization quality and reduced stability under stress. Introducing mixed spacers successfully relieved the tensile stress in these films, as evidenced by shifts in XRD peaks toward higher angles and GIWAXS integral curves toward higher q values, indicating decreased lattice constants. Consequently, the crystal quality and carrier properties of the perovskite films improved dramatically, resulting in enhanced performance and stability during maximum power point tracking, thermal stability tests at 85°C, humidity resistance at 85%, and temperature cycling between 85°C and -40°C. This study highlights how the alignment of residual stress via spacers impacts device stability across diverse working conditions, underscoring the importance of stress regulation in enhancing perovskite intrinsic stability. It offers a practical new approach to improving the reliability of perovskite-based photovoltaic devices.
This research received support from the National Natural Science Foundation, the Chinese Academy of Sciences' scientific research instrument and equipment development projects, and the Strategic Pioneer Science and Technology Special Project of the Middle School.
[Image description: Stress-release regulated by spacer cations affects quasi-two-dimensional perovskite properties]
The image shows how spacers can regulate stress in quasi-two-dimensional perovskite films, illustrating the relationship between stress management and material performance.
SMT FUJI Joint tape Features:
1.New design special for FUJI machine
2.Significant savings on production costs
The feature:
Significant savings on production costs
Increase Pick & Place machine output by 5%-30%
Reduce reel change downtime
Guarantees a precise connection of component reels (new design special for FUJI MACHINE)
Decrease machine abrasion by reducing the need to reload the feeder
Increased efficiency by using all the components on the carrier tape
SMT FUJI Joint Tape,Silver Joint Tape,Fuji Reel Joint Tape,Fuji Joint Connector Tape
ShenZhen KDW Electronics Co.,Ltd , https://www.smtsplicetape.com