Open AccessAqueous‐Containing Precursor Solutions for Efficient Perovskite Solar Cells
Author(s) -
Liu Dianyi,
Traverse Christopher J.,
Chen Pei,
Elinski Mark,
Yang Chenchen,
Wang Lili,
Young Margaret,
Lunt Richard R.
Publication year - 2018
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.201700484
Subject(s) - fabrication , perovskite (structure) , materials science , aqueous solution , moisture , energy conversion efficiency , crystallization , chemical engineering , photovoltaic system , semiconductor , nanotechnology , optoelectronics , chemistry , composite material , electrical engineering , organic chemistry , medicine , alternative medicine , pathology , engineering
Perovskite semiconductors have emerged as competitive candidates for photovoltaic applications due to their exceptional optoelectronic properties. However, the impact of moisture instability on perovskite films is still a key challenge for perovskite devices. While substantial effort is focused on preventing moisture interaction during the fabrication process, it is demonstrated that low moisture sensitivity, enhanced crystallization, and high performance can actually be achieved by exposure to high water content (up to 25 vol%) during fabrication with an aqueous‐containing perovskite precursor. The perovskite solar cells fabricated by this aqueous method show good reproducibility of high efficiency with average power conversion efficiency (PCE) of 18.7% and champion PCE of 20.1% under solar simulation. This study shows that water–perovskite interactions do not necessarily negatively impact the perovskite film preparation process even at the highest efficiencies and that exposure to high contents of water can actually enable humidity tolerance during fabrication in air.