Abstract
It is widely accepted that vertically aligning quasi-2D perovskites can improve power conversion efficiency due to directional charge transport from small to large-n-value nanoplates. Here, we report a different strategy of uniformly arranging different-n-value 2D nanoplates (PEA2MAn-1PbnI3n+1) based on our vacuum poling method to enable superior isotropic carrier transport. Consequently, the high efficiency of 18.04% with open-circuit voltage of 1.223 V and champion fill-factor (FF) of 82.4% are demonstrated, presenting a new approach to develop advanced quasi-2D perovskite optoelectronic devices.
Original language | English |
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Pages (from-to) | 3061-3071 |
Number of pages | 11 |
Journal | Joule |
Volume | 3 |
Issue number | 12 |
DOIs | |
State | Published - Dec 18 2019 |
Funding
The authors at the University of Tennessee acknowledge funding support from the Air Force Office of Scientific Research (AFOSR) under the grant number FA 9550-15-1-0064 , AOARD ( FA2386-15-1-4104 ), and National Science Foundation ( NSF-1911659 ). This research was partially performed at the Center for Nanophase Materials Sciences based on user projects ( CNMS2017-102 ), which is sponsored by Oak Ridge National Laboratory by the Division of Scientific User Facilities, U.S. Department of Energy .
Keywords
- 2D nanoplates
- carrier extraction
- high efficiency
- high fill factor
- perovskite solar cells
- quasi-2D perovskites
- uniform dispersion
- vacuum poling treatment