期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 4, 期 18, 页码 6989-6997出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta09992g
关键词
-
资金
- 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
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据