Hybrid PbS Quantum-Dot-in-Perovskite for High-Efficiency Perovskite Solar Cell

Jianhua Han, Songping Luo, Xuewen Yin, Yu Zhou, Hui Nan, Jianbao Li, Xin Li, Dan Oron, Heping Shen, Hong Lin

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

In this study, a facile and effective approach to synthesize high-quality perovskite-quantum dots (QDs) hybrid film is demonstrated, which dramatically improves the photovoltaic performance of a perovskite solar cell (PSC). Adding PbS QDs into CH3NH3PbI3 (MAPbI3) precursor to form a QD-in-perovskite structure is found to be beneficial for the crystallization of perovskite, revealed by enlarged grain size, reduced fragmentized grains, enhanced characteristic peak intensity, and large percentage of (220) plane in X-ray diffraction patterns. The hybrid film also shows higher carrier mobility, as evidenced by Hall Effect measurement. By taking all these advantages, the PSC based on MAPbI3-PbS hybrid film leads to an improvement in power conversion efficiency by 14% compared to that based on pure perovskite, primarily ascribed to higher current density and fill factor (FF). Ultimately, an efficiency reaching up to 18.6% and a FF of over ≈0.77 are achieved based on the PSC with hybrid film. Such a simple hybridizing technique opens up a promising method to improve the performance of PSCs, and has strong potential to be applied to prepare other hybrid composite materials.

Original languageEnglish
Article number1801016
JournalSmall
Volume14
Issue number31
DOIs
Publication statusPublished - Aug 2 2018

Keywords

  • PbS
  • crystallization
  • hybridizing technique
  • perovskite solar cells
  • quantum dots

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

Fingerprint Dive into the research topics of 'Hybrid PbS Quantum-Dot-in-Perovskite for High-Efficiency Perovskite Solar Cell'. Together they form a unique fingerprint.

  • Cite this

    Han, J., Luo, S., Yin, X., Zhou, Y., Nan, H., Li, J., Li, X., Oron, D., Shen, H., & Lin, H. (2018). Hybrid PbS Quantum-Dot-in-Perovskite for High-Efficiency Perovskite Solar Cell. Small, 14(31), [1801016]. https://doi.org/10.1002/smll.201801016