POS5-1004
Bromine-Functionalized Carbazole-Based Phosphonic Acids and Phosphonic Esters as Efficient Hole-Transporting Materials for Sn-Based Perovskite Solar Cells
Topic
S5. Polymers for Electronics and Photonics
When and Where
Sep 29, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Hae Jung SON
Boseok KANG
Presenter(s)
HSINYU CHEN (National Yang Ming Chiao Tung University)
Co-Author(s)
Abstract
Perovskite solar cells (PSCs) have drawn great interests because of their high efficiency and low production cost. However, defects at the interface between the perovskite layer and the hole-transporting layer (HTL) can hinder charge transfer and reduce device performance. In this work, we synthesize bromo- and methoxy-substituted carbazole-based phosphonic acids and esters (Br-MeO-CPACz and Br-MeO-CPECz) as HTL materials to improve interfacial contact. The incorporation of bromine atoms allows for effective defect passivation via halogen bonding and adjustment of the electronic properties of the carbazole core, while the phosphonic acid and ester groups are capable of forming strong bonds with the perovskite and underlying ITO electrode surfaces. Preliminary research effort demonstrates the synthetic feasibility to obtain these new HTL materials for high performance Sn-based perovskite solar cells.
