Fused Furan-Based Organic Small Molecules as Dopant-Free Hole Transporting Material for Inverted Perovskite Solar Cells

Bingyu Li, Zhipeng Li, Junfei Xing, Mingzhe Zhu, Zhongmin Zhou

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Hole transport material (HTM) is a significant constituent in perovskite solar cells (PSCs). However, HTM generally is not utilized in its pristine form but with dopants (such as lithium salt, tert-butyl pyridine, F4-TCNQ), which accelerates device degradation and leads to poor stability. Therefore, dopant-free HTM is highly desirable to fabricate stable devices. Herein, a fused furan organic small molecule (C8-DPNDF) is introduced as a dopant-free HTM in inverted PSCs. As a potential HTM candidate, C8-DPNDF shows excellent properties, such as high hole mobility, matched energy level with perovskite, and resistance to perovskite precursor solution. As a result, the device based on C8-DPNDF as HTM shows a power conversion efficiency (PCE) of 17.5%, compared with 17.1% of the control device based on classic poly(bis(4-phenyl)(2,4,6-trimethylphenyl)amine) (PTAA) as the HTM. In addition, the unencapsulated device based on C8-DPNDF as HTM keeps 92% of its initial PCE after 30 days of storage in ambient air with a relative humidity of ≈40%. This finding is expected to pave the way toward stable and highly efficient inverted PSCs based on dopant-free HTMs.

Original languageEnglish
Article number2000536
JournalSolar RRL
Volume4
Issue number12
DOIs
Publication statusPublished - 2020 Dec
Externally publishedYes

Keywords

  • hole transporting materials
  • inverted perovskite solar cells
  • mobilities
  • small molecules

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'Fused Furan-Based Organic Small Molecules as Dopant-Free Hole Transporting Material for Inverted Perovskite Solar Cells'. Together they form a unique fingerprint.

Cite this