Journal
ORGANIC ELECTRONICS
Volume 46, Issue -, Pages 253-262Publisher
ELSEVIER
DOI: 10.1016/j.orgel.2017.04.024
Keywords
Perovskite solar cell; Amorphous WOx; Electron extraction layer; Fullerene; Low temperature
Funding
- AIT Special Grant for the Development of Hybrid-Power Science and Technology for Green Energy
- AIT Special Grant for Education and Research
- Hibi Science Foundation
- JSPS [15K060410001]
- Grants-in-Aid for Scientific Research [16H03890] Funding Source: KAKEN
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In perovskite solar cells (PSCs), an electron extraction layer (EEL) plays a crucial role in extracting electrons from the perovskite layer and blocking the holes in it from recombining with the electrons in the fluorine-doped tin oxide (FTO). Amorphous tungsten oxide (WOx) has been successfully employed as EEL in PSCs. However, the WOx device suffers from inherent charge recombination, resulting in low open circuit voltage (V-oc) and fill factor (FF). Here, we report that WOx/fullerene C60 can work coactively to further enhance the performance of PSCs. PSC with WOx/C-60 EELs showed a power conversion efficiency of 16.07% with an open circuit voltage of 0.93 V, a short-circuit current density of 22.15 mA/cm(2), and a fill factor of 0.78, which were higher than those of PSCs with pristine WOx EEL. Our results suggest that using WOx/C-60 as EELs offer a simple and effective approach for fabricating high-performance and lowtemperature PSCs. (C) 2017 Elsevier B. V. All rights reserved.
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