Carbon quantum dot additive engineering for efficient and stable carbon-based perovskite solar cells

Tingting Xu, Zhi Wan, Hebing Tang, Chenhui Zhao, Shaoshen Lv, Yonghua Chen, Lixin Chen, Qiquan Qiao, Wei Huang

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Additive engineering is an effective method to manipulate formation of methyl ammonium metal halide perovskite film for high performance perovskite solar cells (PSCs). In this work, carbon quantum dots (CQDs) prepared from two different carbon sources named as A-CQD and CA-CQD respectively are applied as additives into CH3NH3PbI3 precursor solution via one-step processing. Film morphology and charge transport dynamics of perovskite films with different CQDs additives are investigated. It is found that the A-CQDs incorporated perovskite film has large grain size, excellent crystallinity, enhanced carrier transport ability and high hydrophobic surface. Carbon-based perovskite solar cell using the A-CQD additive shows increased cell performance with the maximum power conversion efficiency (PCE) of 13.28%. While, PCE of the PSCs modified by the CA-CQD additive and without additive are 7.85% and 10.50% respectively. The A-CQD additive modified PSC also presents good long-term stability and maintains more than 90% of its initial PCE after 200 h.

Original languageEnglish (US)
Article number157784
JournalJournal of Alloys and Compounds
Volume859
DOIs
StatePublished - Apr 5 2021

Keywords

  • Additive
  • Carbon quantum dots (CQDs)
  • Functional group
  • Perovskite solar cell
  • Stability

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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