Boosting thin-film perovskite solar cell efficiency through vacuum-deposited sub-nanometer small-molecule electron interfacial layers
Journal
Nano Energy
Journal Volume
38
Pages
66-71
Date Issued
2017
Author(s)
Lee, W.-H.
Chen, C.-Y.
Li, C.-S.
Hsiao, S.-Y.
Tsai, W.-L.
Huang, M.-J.
Cheng, C.-H.
Wu, C.-I.
Lin, H.-W.
Abstract
In this paper, we demonstrate that the performance of perovskite solar cells can be largely boosted with sub-nm pyridine-containing small-molecule electron interfacial layers. These vacuum-deposited sub-nm layers between perovskites and electron transport layers create a permanent dipole moment that improves the interfacial energy level alignment and facilitates a fast electron sweep-out. With these interfacial layers, the devices exhibit exceptional power conversion efficiencies up to 18.8%, a 25% increase compared to that of the one without the interfacial layer.
SDGs
Type
journal article