Bottom-up passivation effects by using 3D/2D mix structure for high performance p-i-n perovskite solar cells

Jiawen Li, Mengge Wu, Genjie Yang, Dayong Zhang, Zijun Wang, Ding Zheng*, Junsheng Yu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Perovskite solar cells (PSCs) have shown a great potential in the field of alternative energy due to their superior performance and processing compatibility. However, prior to commercialization, a major drawback of poor stability needs to be addressed imperatively. Recently, mixing 3D and 2D perovskite as active layer is a promising strategy for blocking water and oxygen to increase stability, as well as mitigating the effect of insulated spacer in bulk to strengthen charge migration. Here, we report a novel method to fabricate high-performance inverted PSCs by involving Phenethylammonium bromide (PEABr) as passivator. During the fabrication, PEABr will diffuse into 3D perovskite and form a mixed 3D/2D structure at the lower interface. This ingenious structure will restrain the charge recombination and reduce the trap state density at the transport layer/perovskite interface and bulk of 3D perovskite. Due to the bottom-up passivation effects, mixed 3D/2D PSCs achieve an improved PCE from 17.59% to 19.46%, in combination with enhanced long-term air stability. This 3D/2D mix structure demonstrates a great potential for developing high-performance and high stability PSCs.

Original languageEnglish (US)
Pages (from-to)44-50
Number of pages7
JournalSolar Energy
Volume205
DOIs
StatePublished - Jul 15 2020
Externally publishedYes

Keywords

  • 2D perovskite
  • 3D/2D mix structure
  • Bottom-up passivation effects
  • High performance
  • Perovskite solar cells

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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