Tuning Film Stresses for Open-Air Processing of Stable Metal Halide Perovskites.

Challenges to upscaling metal halide perovskites (MHPs) include mechanical film stresses that accelerate degradation, dominate at the module scale, and can lead to delamination or fracture. In this work, we demonstrate open-air blade coating of single-step coated perovskite as a scalable method to control residual film stress after processing and introduce beneficial compression in the thin film with the use of polymer additives such as gellan gum and corn starch. The optoelectronic properties of MHP films with compression are improved with higher photoluminescence yields.

Temperature Coefficients of Perovskite Photovoltaics for Energy Yield Calculations.

Temperature coefficients for maximum power ( ), open circuit voltage ( ), and short circuit current ( ) are standard specifications included in data sheets for any commercially available photovoltaic module. To date, there has been little work on determining the for perovskite photovoltaics (PV). We fabricate perovskite solar cells with a of -0.

Integrated QCM-Microtribometry: Friction of Single-Crystal MoS and Gold from μm/s to m/s.

Two opposing microtribometry approaches have been developed over the past decade to help connect the dots between fundamental and practical tribology measurements: spring-based (e.g., AFM) approaches use low speed, low stiffness, and long relative slip length to quantify friction, while quartz crystal microbalance (QCM)-based approaches use high speed, high stiffness, and short relative slip length.

The McAndrews Leadership Lecture: February 2015, by Dr Scott Haldeman. Challenges of the Past, Challenges of the Present.

The McAndrews Leadership Lecture was developed by the American Chiropractic Association to honor the legacy of Jerome F. McAndrews, DC, and George P. McAndrews, JD, and their contributions to the chiropractic profession.