Influence of Nonfused Cores on the Photovoltaic Performance of Linear Triphenylamine-Based Hole-Transporting Materials for Perovskite Solar Cells

Yungen Wu, Zhihui Wang, Mao Liang, Hua Cheng, Mengyuan Li, Liyuan Liu, Baiyue Wang, Jinhua Wu, Raju Prasad Ghimire, Xuda Wang, Zhe Sun, Song Xue, Qiquan Qiao

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

The core plays a crucial role in achieving high performance of linear hole transport materials (HTMs) toward the perovskite solar cells (PSCs). Most studies focused on the development of fused heterocycles as cores for HTMs. Nevertheless, nonfused heterocycles deserve to be studied since they can be easily synthesized. In this work, we reported a series of low-cost triphenylamine HTMs (M101-M106) with different nonfused cores. Results concluded that the introduced core has a significant influence on conductivity, hole mobility, energy level, and solubility of linear HTMs. M103 and M104 with nonfused oligothiophene cores are superior to other HTMs in terms of conductivity, hole mobility, and surface morphology. PSCs based on M104 exhibited the highest power conversion efficiency of 16.50% under AM 1.5 sun, which is comparable to that of spiro-OMeTAD (16.67%) under the same conditions. Importantly, the employment of M104 is highly economical in terms of the cost of synthesis as compared to that of spiro-OMeTAD. This work demonstrated that nonfused heterocycles, such as oligothiophene, are promising cores for high performance of linear HTMs toward PSCs.

Original languageEnglish (US)
Pages (from-to)17883-17895
Number of pages13
JournalACS Applied Materials and Interfaces
Volume10
Issue number21
DOIs
StatePublished - May 30 2018
Externally publishedYes

Keywords

  • conductivity
  • hole mobility
  • hole-transporting materials
  • linear molecular
  • nonfused cores
  • perovskite solar cells

ASJC Scopus subject areas

  • Materials Science(all)

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