International Journal Publication
Fused Dithienoheterocycle‐Based Hole‐Transporting Materials for Efficient Perovskite Solar Cells
Author affiliations and roles
- aDepartment of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan
- bCenter for Green Technology, Chang Gung University, Taoyuan 33302, Taiwan
- cDivision of Neonatology, Department of Pediatrics, Chang Gung Memorial Hospital, Linkou, Taoyuan 33305, Taiwan
- dCollege of Environment and Resources, Ming Chi University of Technology, New Taipei City 24301, Taiwan
- eDepartment of Chemistry, Chung Yuan Christian University, Zhongli, Taoyuan 320, Taiwan
Chemistry–An Asian Journal, 21, e70245 (2026).
Research topic: Hole-Transporting Materials
Abstract
The development of efficient and stable hole-transporting materials (HTMs) is critical for advancing perovskite solar cell (PSC) technology. This study presents two novel HTMs, LK-1 and LK-2, based on fused dithienoheterocycle derivatives, namely, dithieno[3,2-f:2 ',3 '-h]quinoxaline (DTQu) and dithieno[3,2-a:2 ',3 '-c]phenazine (DTPh), designed for PSCs. These donor-acceptor-donor (D-A-D) structured HTMs exhibit planar, rigid cores that enhance pi-pi stacking, improving hole mobility and stability. LK-1 and LK-2 were synthesized and characterized for their optical, electrochemical, and thermal properties. PSCs with LK-1 achieved a power conversion efficiency (PCE) of 18.16%, whereas LK-2 reached 19.40%, outperforming LK-1 due to smoother film properties and reduced recombination. Both HTMs showed high thermal stability and suitable energy alignment with the perovskite layer. LK-2-based PSCs enhanced hydrophobicity and film morphology further suggest its potential for stable, efficient PSCs, advancing the development of robust organic HTMs.