Abstract
Summary Here, we have identified that the key issue for rational transitioning from spin-coating to blade-coating processes of perovskite films arises from whether intermediate phases participate in the phase transition. In situ characterizations were carried out to provide a comprehensive picture of structural evolution and crystal growth mechanisms. These findings present opportunities for designing an effective process for blade-coating perovskite film: a large-grained dense perovskite film with high crystal quality and photophysical properties can be obtained only via direct crystallization for both spin-coating and blade-coating processes. As a result, the blade-coated MAPbI3 films deliver excellent charge-collection efficiency at both short circuit and open circuit, and photovoltaic properties with efficiencies of 18.74% (0.09 cm2) and 17.06% (1 cm2) in planar solar cells. The significant advances in understanding how the phase transition links spin-coating and blade-coating processes should provide a path toward high-performance printed perovskite devices.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1313-1330 |
| Number of pages | 18 |
| Journal | Joule |
| Volume | 2 |
| Issue number | 7 |
| DOIs | |
| State | Published - May 7 2018 |
Bibliographical note
KAUST Repository Item: Exported on 2020-10-01Acknowledgements: This work was supported by the National Key Research and Development Program of China (2017YFA0204800, 2016YFA0202403), the King Abdullah University of Science and Technology (KAUST), the National Natural Science Foundation of China (61604092, 61674098), the National University Research Fund (grant nos. GK201802005, GK261001009), the 111 Project (B14041), and the Chinese National 1000 Talents Plan program (1110010341). CHESS is supported by NSF award DMR-1332208. We also thank Professor Aditya D. Mohite for useful discussion on the charge-collection mechanism.
