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- Title
Efficiency and Stability Enhancement in Perovskite Solar Cells by Inserting Lithium-Neutralized Graphene Oxide as Electron Transporting Layer.
- Authors
Agresti, Antonio; Pescetelli, Sara; Cinà, Lucio; Konios, Dimitrios; Kakavelakis, George; Kymakis, Emmanuel; Carlo, Aldo Di
- Abstract
This work proposes a new perovskite solar cell structure by including lithium-neutralized graphene oxide (GO-Li) as the electron transporting layer (ETL) on top of the mesoporous TiO2 (m-TiO2) substrate. The modified work-function of GO after the intercalation of Li atoms (4.3 eV) exhibits a good energy matching with the TiO2 conduction band, leading to a significant enhancement of the electron injection from the perovskite to the m-TiO2. The resulting devices exhibit an improved short circuit current and fill factor and a reduced hysteresis. Furthermore, the GO-Li ETL partially passivates the oxygen vacancies/defects of m-TiO2 by resulting in an enhanced stability under prolonged 1 SUN irradiation.
- Subjects
PEROVSKITE; SOLAR cells; GRAPHENE oxide; ELECTRON transport; HYSTERESIS; IRRADIATION
- Publication
Advanced Functional Materials, 2016, Vol 26, Issue 16, p2686
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.201504949