Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 4, Issue 18, Pages 6989-6997Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta09992g
Keywords
-
Funding
- Office of Basic Energy Sciences of the U.S. Department of Energy [DE-AC02-05CH11231]
- NASA MIRO Center [NNX15AQ01A]
- National Science Foundation [DMR-1056860]
- Direct For Mathematical & Physical Scien [1056860] Funding Source: National Science Foundation
- Division Of Materials Research [1056860] Funding Source: National Science Foundation
- NASA [801189, NNX15AQ01A] Funding Source: Federal RePORTER
Ask authors/readers for more resources
We report our results of developing perovskite thin films with high coverage, improved uniformity and preserved crystalline continuity in a single pass deposition. This approach, inspired by the natural phenomena of tears of wine, works by regulating the hydrodynamics of the material comprising of droplets during spray-pyrolysis. In contrast to conventional spray-pyrolysis where droplets dry independently and form a rough morphology, the use of binary solvent system creates localized surface tension gradients that initiate Marangoni flows, thus directing the incoming droplets to spontaneously undergo coalescing, merging and spreading into a continuous wet films before drying. By systematically exploring the dynamics of spreading and drying, we achieve spray-coated perovskite photovoltaics with power conversion efficiency of 14.2%, a near two-fold improvement than that of the spray-pyrolysis counterpart. Of particular significance is the fact that the single pass deposition technique unveils novel inroads in efficient management of lead consumption during deposition.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available