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Improvement in Dibenzofuran-Based Hole Transport Materials for Flexible Perovskite Solar Cells.

Yuanqiong LinXiao ZhangJinchuan LuXiaohan LinYinghua LuXin LiSong Tu
Published in: Molecules (Basel, Switzerland) (2024)
The π-conjugated system and the steric configuration of hole transport materials (HTMs) could greatly affect their various properties and the corresponding perovskite solar cells' efficiencies. Here, a molecular engineering strategy of incorporating different amounts of p-methoxyaniline-substituted dibenzofurans as π bridge into HTMs was proposed to develop oligomer HTMs, named mDBF , bDBF , and tDBF . Upon extending the π-conjugation of HTMs, their HOMO energy levels were slightly deepened, significantly increasing the thermal stability and hole mobility. The incorporation of p-methoxyaniline bridges built one or two additional triphenylamine propeller structures, resulting in a denser film. Here, the tDBF -based n-i-p flexible perovskite solar cells createdchampion efficiency, giving a power conversion efficiency of 19.46%. And the simple synthesis and purification process of tDBF contributed to its low manufacturing cost in the laboratory. This work provided a reference for the development of low-cost and efficient HTMs.
Keyphrases
  • perovskite solar cells
  • low cost
  • high resolution
  • photodynamic therapy
  • molecular docking
  • solid state
  • room temperature
  • single molecule
  • mass spectrometry