期刊
SCIENCE ADVANCES
卷 8, 期 35, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abo3733
关键词
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资金
- Beijing Natural Science Foundation [JQ21005]
- National Key R&D Program of China [2021YFB3800100, 2021YFB3800101]
- National Natural Science Foundation of China [91733301, 62104221]
- China Postdoctoral Science Foundation [2020M670036]
- RD Fruit Fund [20210001]
- King Abdulaziz City for Science and Technology (KACST)
- Royal Society
- EPSRC project SUNRISE [EP/P032591/1]
- U.S. Office of Naval Research [N00014-17-1-2241]
- USTC Research funds of the Double First-Class Initiative [YD2100002007]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
- DOE Office of Science User Facility [DE-AC02-05CH11231]
- Generalitat de Catalunya [2017 SGR 327]
- Spanish MINECO project [ENE2017-85087-C3]
- Severo Ochoa program from Spanish MINECO [SEV-2017-0706]
- CERCA Programme/Generalitat de Catalunya
Researchers have successfully mitigated grain boundaries in perovskite solar cells at both nano and submicron scales, leading to improved device efficiency and stability under various stress conditions.
There exists a considerable density of interaggregate grain boundaries (GBs) and intra-aggregate GBs in polycrystalline perovskites. Mitigation of intra- aggregate GBs is equally notable to that of interaggregate GBs as intra-aggregate GBs can also cause detrimental effects on the photovoltaic performances of perovskite solar cells (PSCs). Here, we demonstrate full-scale GB mitigation ranging from nanoscale intra-aggregate to submicron-scale interaggregate GBs, by modulating the crystallization kinetics using a judiciously designed brominated arylamine trimer. The optimized GB-mitigated perovskite films exhibit reduced nonradiative recombination, and their corresponding mesostructured PSCs show substantially enhanced device efficiency and long-term stability under illumination, humidity, or heat stress. The versatility of our strategy is also verified upon applying it to different categories of PSCs. Our discovery not only specifies a rarely addressed perspective concerning fundamental studies of perovskites at nanoscale but also opens a route to obtain high-quality solution-processed polycrystalline perovskites for high-performance optoelectronic devices.
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