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Updated: Sep 11, 2025
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
Improving Charge Extraction and Operational Stability in Inverted Perovskite Solar Cells with Conjugated Block
Lei Yang1,2, Chenglin Yang1, Wenjuan Wei1
1College of Materials Science and Opto-electronic Technology, Center of Materials Science and Optoelectronics Engineering, CAS Center for Excellence in Topological Quantum Computation, CAS Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences, Beijing, 101408, China.
Abstract:
A defect-passivated, electronically benign interface is essential for high-performance, stable perovskite solar cells (PSCs). Most conventional surface passivation strategies frequently introduce electrically resistive interlayers that compromise charge transport/extraction between the perovskite and charge-transport layers. We resolve this challenge through the rational implementation of all-conjugated block copolymers (CBCPs). The CBCPs demonstrate dual-functional capabilities of offering charge transport channels while facile integrating multiple defect-passivating moieties, thereby enabling efficient charge carrier transport and defect passivation. This dual-functional synergy yielded a power conversion efficiency (PCE) of 26.11% in our best device. The target PSCs maintained >90% of their initial PCEs after maximum power point tracking for >1400 hours at 65 °C. This approach offers a promising strategy for interface engineering that improves both charge extraction and defect reduction using conjugated block copolymers.
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