High-Performance and Robust CH3NH3PbI3/Nanoclay Hybrid Perovskite Solar Cells Under High-Humidity Condition
Hsin-Hsiang Huang a b, Leeyih Wang b, King-Fu Lin a
a Department of Materials Science and Engineering, National Taiwan University, Taipei 10617, Taiwan.
b Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan.
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV19)
Roma, Italy, 2019 May 12th - 15th
Organizers: Prashant Kamat, Filippo De Angelis and Aldo Di Carlo
Poster, Hsin-Hsiang Huang, 060
Publication date: 11th February 2019

The power conversion efficiency (PCE) of perovskite solar cell is high enough to be commercially viable. However, its long-term stability is still an inevitable issue that obstructs commercialization. Here, we demonstrated that a robust inverted perovskite solar cell with an outstanding PCE of ~17% can be realized by simply using montmorillonite (MMT)/ CH3NH3PbI3 nanocomposite as photoactive layer. Results from the XPS depth profile clearly indicated, during the spin-drying process, the exfoliated MMT nanoplates can self-organize into an ultra-dense top layer, which effectively retards the penetration of gases and moisture, owing to the formation of an outstandingly dense gas permeation barrier of exfoliated MMT shell that effectively retards the moisture from penetrating into the perovskite that achieving extremely stable perovskite-based photovoltaic cells. Such naked device exhibited no visible loss on photovoltaic performance after being stored in a controlled humidity at room temperature for ~180 days. It is believed that this extensively modified device and low-cost architecture will compellingly lead to the timely commercialization of perovskite solar cells.

This work was supported by the Ministry of Science and Technology of the Republic of China through grant MOST103-2221-E-002-280-MY3. L. W. acknowledges the funding supported by Institute of Atomic and Molecular Sciences, Academia Sinica and Ministry of Science and Technology of the Republic of China through grants AS-iMATE-107-34 and MOST105-2119-M-002-030-MY3.

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