Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 48, Pages 24226-24231Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta07714a
Keywords
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Funding
- HK Innovation and Technology Fund [ITS/004/14]
- HK-RGC General Research Funds (GRE) [HKUST 606511]
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Among the various perovskite solar cells, the carbon-based hole-transporter-free type is arguably the most promising for applications because of its low material/manufacturing cost, high efficiency and better long-termstability. However, the fill factor (FF) is typically below 0.75, limiting the cell performance. In this communication, through a comparison of systematic performance between the multi-walled carbon nanotube (MWCNT) and another two representative carbon materials, namely carbon black and graphite, we highlight two salient advantages of MWCNT-based devices: high FF and hysteresis-free performance. We owe the superior performance to the charge transport highway at the interface of MWCNT/perovskite. After preliminary optimization, we have achieved a PCE of 12.67% with a very impressive FF of 0.80, which is among the highest for carbon-based perovskite solar cells.
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