Joule: Polycarbazolephosphonic acid as a versatile hole transport material for p-i-n perovskite cells and components

• Commonly used poly(triarylamine) and carbazolephosphonic acid (PACz) hole transport materials (HTM) are limited by their poor wettability to perovskite solutions and poor sensitivity to layer thickness/substrate roughness, respectively. Practical applications in perovskite modules. In order to solve these problems, Yan He of Hong Kong University of Science and Technology, Chen Shangshang of Nanjing University and others reported a new type of HTM by polymerizing PACz into a universal polymer material.

  
  

  The resulting polymer HTM (named Poly-4PACz) has excellent hole extraction ability, which can further suppress interfacial recombination and stabilize the perovskite/HTM interface. Most importantly, Poly-4PACz is highly conductive on both indium-doped tin oxide and fluorine-doped tin oxide substrates and is insensitive to layer thickness, which is ideal for scalable coatings of perovskite films. Said it was very ideal.

  
  

  As a result, the blade-coated p-i-n perovskite solar cells and modules achieved power conversion efficiencies of 24.4% and 20.7% at aperture areas of 6.84 mm2 and 25.0 cm2, respectively.

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• Zhijun Ren et.al Poly(carbazole phosphonic acid) as a versatile hole-transporting material for p-i-n perovskite solar cells and modules Joule 2023

  
  

  DOI: 10.1016/j.joule.2023.10.014

  
  

  https://doi.org/10.1016/j.joule.2023.10.014