Hole-transporting small molecules based on thiophene cores for high efficiency perovskite solar cells

ChemSusChem. 2014 Dec;7(12):3420-5. doi: 10.1002/cssc.201402587. Epub 2014 Sep 18.

Abstract

Two new electron-rich molecules, 2,3,4,5-tetra[4,4'-bis(methoxyphenyl)aminophen-4"-yl]-thiophene (H111) and 4,4',5,5'-tetra[4,4'-bis(methoxyphenyl)aminophen-4"-yl]-2,2'-bithiophene (H112), which contain thiophene cores with arylamine side groups, are reported. When used as the hole-transporting material (HTM) in perovskite-based solar cell devices, power conversion efficiencies of up to 15.4% under AM 1.5G solar simulation were obtained. This is the highest efficiency achieved with HTMs not composed of 2,2',7,7'-tetrakis(N,N'-di-p-methoxyphenylamine)-9,9'-spirobifluorene (spiro-OMeTAD) and its isomers. Both HTMs, especially H111, have great potential to replace expensive spiro-OMeTAD given their much simpler and less expensive syntheses.

Keywords: dyes/pigments; electrochemistry; heterocycles; perovskite phases; solar cells.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Calcium Compounds / chemistry*
  • Calorimetry, Differential Scanning
  • Dielectric Spectroscopy
  • Electric Power Supplies*
  • Magnetic Resonance Spectroscopy
  • Oxides / chemistry*
  • Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
  • Sunlight*
  • Thiophenes / chemistry*
  • Titanium / chemistry*

Substances

  • Calcium Compounds
  • Oxides
  • Thiophenes
  • perovskite
  • Titanium