Dopant-free novel hole-transporting materials based on quinacridone dye for high-performance and humidity-stable mesoporous perovskite solar cells

Hong Duc Pham, Sagar M. Jain, Meng Li, Sergei Manzhos, Krishna Feron, Sudhagar Pitchaimuthu, Zhiyong Liu, Nunzio Motta, Hongxia Wang, James R. Durrant, Prashant Sonar

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)

Abstract

This study reports three newly developed dopant-free hole-transporting materials (HTMs) for perovskite solar cells. The design is based on a quinacridone (QA) dye as the core with three different extended end-capping moieties, namely, acenaphthylene (ACE), triphenylamine (TPA) and diphenylamine (DPA), attached to the QA core. These HTMs were synthesized and used to successfully fabricate in mesoscopic TiO2/CH3NH3PbI3/HTM perovskite devices. Under AM 1.5G illumination at 100 mW cm-2, the devices achieved a maximum efficiency of 18.2% for ACE-QA-ACE, 16.6% for TPA-QA-TPA and 15.5% for DPA-QA-DPA without any additives, whereas reference devices with doped spiro-OMeTAD as the HTM achieved a PCE of 15.2%. Notably, the unencapsulated devices based on the novel dopant-free HTMs exhibited impressive stability in comparison with the devices based on doped spiro-OMeTAD under a relative humidity of 75% for 30 days. These linear symmetrical HTMs pave the way to a new class of organic hole-transporting materials for cost-efficient and large-area applications of printed perovskite solar cells.

Original languageEnglish
Pages (from-to)5315-5323
Number of pages9
JournalJournal of Materials Chemistry A
Volume7
Issue number10
Early online date4 Feb 2019
DOIs
Publication statusPublished - 14 Mar 2019

ASJC Scopus subject areas

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

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