Inclusion of triphenylamine unit in dopant-free hole transport material for enhanced interfacial interaction in perovskite photovoltaics

Ji Hyeon Lee, Min Ho Jang, Chan Hee Lee, Jae Joon Lee, Sae Youn Lee, Jea Woong Jo

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Dopant-free hole transport material (HTM) has been recognized as an essential material for achieving efficient and stable perovskite photovoltaics (PPVs). Currently, conjugated polymer has emerged as a promising dopant-free HTM; however, its insufficient interaction with perovskite absorbers limits an efficient interfacial passivation and charge extraction when employed in PPVs. In this study, we developed a high-performance dopant-free HTM by the partial substitution of a conjugated polymer with triphenylamine unit. The analysis of the performance of the HTM revealed that the modification of the polymer HTM using triphenylamine unit enhanced its interaction with perovskite and its passivation ability. Furthermore, an increase in the number of face-on orientated crystallites after the triphenylamine substitution enhanced the charge transport ability of the polymer HTM. Consequently, the PPVs fabricated using the triphenylamine-substituted polymer HTM exhibited a high efficiency of 20.4% and an enhanced long-term stability compared to the devices fabricated using a control polymer without triphenylamine-substitution (15.8%).

Original languageEnglish
Article number110162
JournalDyes and Pigments
Volume200
DOIs
StatePublished - Apr 2022

Keywords

  • Conjugated polymer
  • Dopant-free hole transport materials
  • Interface engineering
  • Perovskite photovoltaics
  • Surface passivation

Fingerprint

Dive into the research topics of 'Inclusion of triphenylamine unit in dopant-free hole transport material for enhanced interfacial interaction in perovskite photovoltaics'. Together they form a unique fingerprint.

Cite this