Controlling Thin-Film Stress and Wrinkling during Perovskite Film Formation

Perovskite solar cells: film formation and properties

Perovskite solar cells have received considerable attention in recent years as a promisingmaterial capable of developing high performance photovoltaic devices at a low cost. Their high absorption coefficient, tunable band gap, low temperature processing and abundant elemental constituents provide numerous advantages overmost thin film absorbermaterials. In this review, we discuss the current st...

Bending, Wrinkling, and Folding of Thin Polymer Film/Elastomer Interfaces

Thermally induced wrinkling in thin-film stacks on patterned substrates

Thermally induced film wrinkling is a fabrication and reliability challenge for thin-film stacks consisting of a compliant film capped by a stiffer film. The current understanding of film wrinkling is largely restricted to thin-film stacks on blanket substrates. An understanding of wrinkling in thin-film stacks on patterned substrates is of greater practical relevance to the microelectronic ind...

Mechanisms of intrinsic stress formation in thin film systems

The effect of the adatom surface diffusivity on the evolution of the microstructure and the intrinsic stress of thin metal films was investigated for the case of growth of polycrystalline Ag films on amorphous SiO2 (a-SiO2) and amorphous Ge (a-Ge) substrates, with high and low Ag adatom surface diffusivity, respectively. The surface diffusivity of the deposited Ag adatoms on the a-Ge substrate ...

Thin film formation during splashing of viscous liquids.

After impact onto a smooth dry surface, a drop of viscous liquid initially spreads in the form of a thick lamella. If the drop splashes, it first emits a thin fluid sheet that can ultimately break up into droplets causing the splash. Ambient gas is crucial for creating this thin sheet. The time for sheet ejection, t{ejt}, depends on impact velocity, liquid viscosity, gas pressure, and molecular...