Tuning the Pore Structures in TiO2 Thin Films by Polymer Templates for High-Performance Perovskite Solar Cells

• DOI: 10.1021/acsaem.3c01921
• Publication Date: 2023-10-17T09:43:01Z
• Authors: Chidambaram Brundha; Jeong Keun Cha; Qi Fa Ren; Ho Sung Kim; Hyung Woo Lee; Soo Hyung Kim
• Keywords: Template; Spin Coating

Increasing the contact area between TiO2 thin films (TFs) and methylammonium lead iodide (MAPbI3) perovskite layers (PLs) is important to improving electron transport in solar cells (PSCs). We fabricated various PSCs incorporated with mesoporous (meso-TiO2) TFs comprising an organic polymer (i.e., ethylcellulose (EC)) as a templating agent increase of MAPbI3. The average pore size thickness meso-TiO2 TFs/MAPbI3 PLs are controlled by varying amount EC TFs. as-prepared enhances crystallinity infiltration MAPbI3 passivates several defects formed at interfaces PLs. An optimized EC-templated TF applied layer exhibited maximum power conversion efficiency (PCE) 16.64%, which was substantially higher than that obtained using pristine (PCE = 11.32%) reference device. This suggests use commercially available templates can significantly aid development highly efficient mesostructure-tuned relatively simple, viable, low-cost spin-coating method.