Ambipolar carrier transport properties of triphenylamine/dibenzofulvene derivative and its application for efficient n-i-p perovskite solar cells

Hsin Chang Lin, Li-Yin Chen*, Chang Chia Lu, Jai You Lai, Yung Chung Chen, Yung Jr Hung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Herein, the carrier transport properties of 9-(4-(diphenylamino)benzylidene)-N′,N′,N′,N′-tetraphenyl-9H-fluorene-2,7-diamine (YC-1) was firstly investigated with time-of-flight method. YC-1 exhibited ambipolar conductive behaviour, with hole and electron mobilities up to 10−4 cm2(Vs)−1. We introduced YC-1 as a hole transporting layer (HTL) in a planar n-i-p perovskite solar cell. A device fabricated using YC-1 exhibited enhanced performance compared to the device fabricated using P3HT, demonstrating 14.91% power conversion efficiency (PCE) and low hysteresis with a hysteresis effect index (HEI) of 0.007. A comprehensive analysis of the J-V characteristics in hole-only devices revealed the improvement of the YC-1 based devices were mainly contributed to the higher conductivity and lower trap density, which were beneficial to the device performance. This work suggests the thermally evaporable triphenylamine/dibenzofulvene can be a good candidate for HTL of conventional perovskite solar cells.

Original languageEnglish
Article number106200
Pages (from-to)1-6
Number of pages6
JournalOrganic Electronics
Volume95
DOIs
StatePublished - Aug 2021

Keywords

  • Hole transporting layer
  • MAPbI perovskite
  • Solar cell
  • Thermal evaporation
  • Triphenylamine/dibenzofulvene derivative

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