Department of Chemistry and Research Institute for Convergence of Basic Sciences, Hanyang University, Seoul 04763, Republic of Korea.
Nanoscale. 2018 Jul 13;10(27):13187-13193. doi: 10.1039/c8nr02903b.
We demonstrated a water-resistant PEDOT:PSS HTL by incorporating a photo-crosslinking agent into a PEDOT:PSS film. A crosslinking system was successfully formed inside the PEDOT:PSS film by simple and fast photo-polymerization of PCDSA monomers. Combination of the crosslinking system and MeOH surface treatment simultaneously improved the device efficiency and stability of both perovskite and polymer solar cells. The crosslinking system inside PEDOT:PSS changed its intrinsic water-soluble characteristic into a water-resistant property, thus preventing water penetration into the PEDOT:PSS film. In addition, MeOH treatment improved the surface conductivity and reduced the surface roughness of the PEDOT:PSS film by removing surface residues of PDAs and insulating PSS parts.
我们通过在PEDOT:PSS 薄膜中加入光交联剂，制备了一种具有耐水性的 PEDOT:PSS HTL。通过 PCDSA 单体的简单快速光聚合，在 PEDOT:PSS 薄膜内成功形成了交联体系。交联体系与甲醇表面处理相结合，同时提高了钙钛矿和聚合物太阳能电池的器件效率和稳定性。PEDOT:PSS 内的交联体系将其内在的水溶性特性转变为耐水性，从而阻止水渗透到 PEDOT:PSS 薄膜中。此外，甲醇处理通过去除 PDAs 和绝缘 PSS 部分的表面残留物，提高了 PEDOT:PSS 薄膜的表面电导率并降低了其表面粗糙度。
