Nanoribbon-Based Heterostructures
Abstract
Currently, most research on inorganic-organic hybrid perovskite solar cells is beingconducted on a lab-scale with small device sizes, primarily using spin-coating to deposit theperovskite layer. Herein, we propose the use of a novel deposition method called “solutionshearing.�Solution-shearing has key advantages over spin-coating such as the uniform filmdeposition over much larger areas and fine control of film crystallinity during its formation.This is in contrast to spin-coating, which is limited in large area deposition and requires severaladditional steps such as solution engineering to modify the crystallinity of perovskite films, yetwith limited control. Also, because solution shearing enables fine tuning of various parametersthat influence nucleation and growth of grains, extensive study can be conducted to understandthe mechanism underlying thin-film formation. Solution shearing can also be used to applyvoltage bias across the perovskite layer during deposition, an experimental technique that hasnot been utilized before. The results should provide important insight into the orientationarrangement of organic cations in perovskite and potentially elucidate the currently debatedissue on the ferroelectric properties of perovskites. Finally, solution-shearing will be used tofabricate high-efficiency perovskite solar cells with high uniformity and large grain sizes,which we will eventually scale-up to module-sized devices over much larger areas.We believe that our study of nucleation and growth of grains and the effect of applied biasduring film formation using solution-shearing will contribute to a fundamental scientificunderstanding of perovskites. In addition, our eventual goal of fabricating high-efficiency,large-area perovskite solar cells will contribute to developing efficient power and energysystems and more generally help realize the commercialization of perovskite solar cells
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 21, 2018
- Source ID
- N629091712113
Entities
People
- Byungha Shin
Organizations
- Office of Naval Research
- United States Navy