The Role of the Interfaces in Perovskite Solar Cells

Shuyan Shao, Maria Antonietta Loi*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

43 Citations (Scopus)
317 Downloads (Pure)

Abstract

Organic-inorganic hybrid perovskite solar cells (HPSCs) have achieved an impressive power conversion efficiency (PCE) of 25.2% in 2019. At this stage, it is of paramount importance to understand in detail the working mechanism of these devices and which physical and chemical processes govern not only their power conversion efficiency but also their long-term stability. The interfaces between the perovskite film and the charge transport layers are among the most important factors in determining both the PCE and stability of HPSCs. Herein, an overview is provided on the recent advances in the fundamental understanding of how these interfaces influence the performance of HPSCs. Firstly, it is discussed how the surface energy of the charge transport layer, the energy level alignment at the interfaces, the charge transport in interfacial layers, defects and mobile ions in the perovskite film, and interfacial layers or at the interfaces affect the charge recombination as well as hysteresis and light soaking phenomenon. Then it is discussed how the interfaces and interfacial materials influence the stability of HPSCs. At the same time, an overview is also provided on the various design strategies for the interfaces and the interfacial materials. At the end, the outlook for the development of highly efficient and stable HPSCs is provided.

Original languageEnglish
Article number1901469
Number of pages31
JournalAdvanced Materials Interfaces
Volume7
Issue number1
Early online date20-Nov-2019
DOIs
Publication statusPublished - 9-Jan-2020

Keywords

  • charge recombination
  • charge transport layer
  • interface
  • perovskite solar cells
  • stability
  • HOLE TRANSPORT MATERIALS
  • CHARGE-CARRIER MOBILITIES
  • METAL HALIDE PEROVSKITES
  • HIGHLY EFFICIENT
  • LOW-TEMPERATURE
  • THIN-FILM
  • CH3NH3PBI3 PEROVSKITE
  • PERFORMANCE ENHANCEMENT
  • ELECTRON EXTRACTION
  • INDUCED DEGRADATION

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