Journal
NANO ENERGY
Volume 38, Issue -, Pages 66-71Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2017.05.049
Keywords
Perovskite solar cells; Vacuum deposition; Electron interfacial layer; Pyridine derivatives
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Funding
- Ministry of Science and Technology of Taiwan [MOST 105-2112-M-007-016-MY3, MOST 105-2628-E-007-008-MY3, MOST 105-2633-M-007-003]
- National Tsing Hua University
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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.
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