Abstract
The tandem structure using perovskite front cells is a very promising strategy to overcome the Shockley-Queisser limit. The transparency of the front cell window layer is the key to maximize incident light utilization efficiency. A buffer layer is required to prevent the organic materials from sputtering damage when conducting metal oxides are used as the window layer. Here, we report a combination of Ag (1 nm) and MoO3 (3 nm) as a buffer layer to fabricate a highly efficient inverted perovskite front cell. Characterizations show MoO3 reacts with predeposited Ag and forms Ag2MoO4, resulting in a dense, continuous, and uniform protection layer. Importantly, the intrinsic electron-transport property and matched energy levels of Ag2MoO4 with adjacent layer materials greatly improve charge carrier collection efficiency, resulting in a 65% enhancement in efficiency compared to the Ag-only buffer layer. Our results demonstrate that the in situ reaction of an oxide with a metal is a simple strategy to build functional ultrathin films.
Original language | English |
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Pages (from-to) | 9742-9749 |
Number of pages | 8 |
Journal | ACS Applied Energy Materials |
Volume | 3 |
Issue number | 10 |
DOIs | |
State | Published - 26 Oct 2020 |
Externally published | Yes |
Keywords
- AgMoO
- In situ reaction
- Perovskite
- Tandem solar cell
- Transparent electrode