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Published on: March 19, 2017
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Stabilized hole-selective layer for high-performance inverted p-i-n perovskite solar cells
Zhen Li1, Xianglang Sun1,2, Xiaopeng Zheng3,4
1Department of Chemistry, City University of Hong Kong, Kowloon 999077, Hong Kong.
Science (New York, N.Y.)
|October 19, 2023
Summary
A new nickel oxide layer with a robust SAM enhances perovskite solar cell (PSC) stability and performance. This advancement improves thermal stability and power conversion efficiency for future solar energy applications.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- Perovskite solar cells (PSCs) with a p-i-n geometry offer advantages in fabrication and processing.
- Self-assembled monolayers (SAMs) can improve PSC performance, but ultrathin SAMs often lack thermal stability.
Purpose of the Study:
- To develop a thermally robust hole-selective layer for p-i-n PSCs.
- To enhance and stabilize the nickel oxide/perovskite interface using a novel SAM.
Main Methods:
- Fabrication of a nickel oxide (NiOx) nanoparticle film.
- Surface functionalization with (4-(3,11-dimethoxy-7H-dibenzo[c,g]carbazol-7-yl)butyl)phosphonic acid (MeO-4PADBC) SAM.
- Characterization of the NiOx/MeO-4PADBC/perovskite interface and device performance under thermal stress.
Main Results:
- The NiOx/MeO-4PADBC layer demonstrated improved energetic alignment and favorable interfacial contact with perovskite.
- Reduced voltage deficits were observed across various perovskite compositions.
- Devices exhibited enhanced thermal stability, maintaining over 90% of their initial efficiency after 1200 hours of operation at 65°C.
Conclusions:
- The NiOx/MeO-4PADBC SAM provides a thermally robust hole-selective layer, significantly improving PSC performance and stability.
- This approach offers a promising strategy for developing durable and efficient perovskite solar cells.
