Unravelling the role of C60 derivatives as additives into active layer for achieving high-efficiency planar perovskite solar cells

Lina Hu, Shiqi Li, Longlong Zhang, Yifan Liu, Chenxi Zhang, Yukun Wu, Qinjun Sun, Yanxia Cui, Fu Rong ZHU, Yuying Hao*, Yu Cheng Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Fullerene derivatives have been proved to be useful as additives into active layer to improve perovskite solar cells (PSCs) performance in the power conversion efficiency, stability and reproducibility. In this work, to unravel the influences of chemical compositions of fullerene derivatives on the PSCs performance, we systematically compare a series of fullerene-derivatives additives, including C60, PCBM and C60-Taurine. Two important conclusions are achieved: (i) the bare C60 cage primarily plays a role to accelerate the electron extraction and transport; (ii) the side chains adhered to the C60 cage could further help to improve the stability of PSCs by reducing the defect states and improving the perovskite crystalline quality. It is also noteworthy that these two goals may be hard to be simultaneously achieved because the insulation property of side chains leads to the decline of electron extraction capacity. Therefore, an intelligent design of fullerene derivatives as the additives is strongly suggested to balance the stability and PCE.

Original languageEnglish
Pages (from-to)160-168
Number of pages9
JournalCarbon
Volume167
DOIs
Publication statusPublished - 15 Oct 2020

Scopus Subject Areas

  • Chemistry(all)
  • Materials Science(all)

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