Mesostructured Fullerene Electrodes for Highly Efficient n-i-p Perovskite Solar Cells

Yufei Zhong, Rahim Munir, Ahmed Hesham Balawi, Arif D. Sheikh, Liyang Yu, Ming Chun Tang, Hanlin Hu, Frédéric Laquai, Aram Amassian*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


Electron-transporting layers in today's state-of-the-art n-i-p organohalide perovskite solar cells are almost exclusively made of metal oxides. Here, we demonstrate a novel mesostructured fullerene-based electron-transporting material (ETM) that is crystalline, hydrophobic, and cross-linked, rendering it solvent- and heat-resistant for subsequent perovskite solar cell fabrication. The fullerene ETM is shown to enhance the structural and electronic properties of the CH3NH3PbI3 layer grown atop, reducing its Urbach energy from ∼26 to 21 meV, while also increasing crystallite size and improving texture. The resulting mesostructured n-i-p solar cells achieve reduced recombination, improved device-to-device variation, reduced hysteresis, and a power conversion efficiency above 15%, surpassing the performance of similar devices prepared using mesoporous TiO2 and well above the performance of planar heterojunction devices on amorphous or crystalline [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). This work is the first demonstration of a viable, hydrophobic, and high-performance mesostructured electron-accepting contact to work effectively in n-i-p perovskite solar cells.

Original languageEnglish (US)
Pages (from-to)1049-1056
Number of pages8
JournalACS Energy Letters
Issue number5
StatePublished - Nov 11 2016

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry


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