Surface modified fullerene electron transport layers for stable and reproducible flexible perovskite solar cells. (July 2018)

• Record Type: Journal Article
• Authors: Song, Seulki; Hill, Rebecca; Choi, Kyoungwon; Wojciechowski, Konrad; Barlow, Stephen; Leisen, Johannes; Snaith, Henry J.; Marder, Seth R.; Park, Taiho
• Is Part Of: Nano energy. Volume 49(2018)
• Page Start: 324
• Page End: 332
• Publication Date: 2018-07
• Subjects: Low temperature -- Planar device -- Organic ETL -- Flexible device; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2018.04.068
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: We report flexible planar perovskite solar cells with robust electron-transport layers (ETLs) processed at low temperature. A poly(allylamine) (PAA; 0.08 wt%) solution was deposited on a C60 layer and heated at 150 °C for 60 s, resulting in the formation of an insoluble robust C60 –PAA electron-transport layer (ETL) on the flexible substrate. The flexible planar perovskite solar cell with the C60 –PAA ETL exhibited excellent properties with 83% efficiency retention (η = 15.2% without hysteresis) after 600 cycles of bending. This performance is superior to that of the flexible device with a C60 ETL fabricated without the use of PAA (65% efficiency retention; η = 9.8% with some hysteresis). Graphical abstract: fx1 Highlights: A modified fullerene-based electron transport layer is proposed for stable flexible perovskite device. A poly(allylamine) (PAA; 0.08 wt%) solution was deposited on a C60 layer to form a C60 -PAA. C60 –PAA electron-transport layer (ETL) is insoluble in perovskite precursor solution. Flexible planar perovskite solar cell with the C60 –PAA ETL exhibited excellent properties with 83% efficiency retention.