articleJournal of the American Chemical SocietyNov 23, 2015Closed access

Multifunctional Fullerene Derivative for Interface Engineering in Perovskite Solar Cells

YLYaowen LiYZYue ZhaoQCQi ChenYYYang YangYLYongsheng Liu

University of California, Los Angeles · Soochow University

PubMed
Indexed incrossrefpubmed

Abstract

In perovskite based planar heterojunction solar cells, the interface between the TiO2 compact layer and the perovskite film is critical for high photovoltaic performance. The deep trap states on the TiO2 surface induce several challenging issues, such as charge recombination loss and poor stability etc. To solve the problems, we synthesized a triblock fullerene derivative (PCBB-2CN-2C8) via rational molecular design for interface engineering in the perovskite solar cells. Modifying the TiO2 surface with the compound significantly improves charge extraction from the perovskite layer. Together with its uplifted surface work function, open circuit voltage and fill factor are dramatically increased from 0.99 to…

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534
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Authors

11

Topics & keywords

Topics
Keywords
  • Perovskite (structure)
  • Passivation
  • Chemistry
  • Fullerene
  • Photovoltaic system
  • Optoelectronics
  • Work function
  • Heterojunction
UN Sustainable Development Goals
  • Affordable and clean energy
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