A Composite Interlayer Enabling Simultaneous Performance Enhancement in Quantum Dot Solar Cells and Photodetectors
Youdi Zhang , Pai Peng , Yang Xu , Jingjing Wang , Biao Xiao , Vakhobjon Kuvondikov , Sherzod Nematov , Long Ye , Junwei Liu
Chinese Journal of Chemistry ›› 2026, Vol. 44 ›› Issue (1) : 95 -103.
Quantum dots (QDs) have attracted significant attention in devices such as solar cells and photodetectors. Although polymer-based hole transport layers (HTLs) have been employed in QD devices, their mechanical flexibility remains underexplored and insufficient for wearable applications. Here, we present a novel interlayer design for PbS QD solar cells and photodetectors by incorporating a low-cost thermoplastic elastomer, SEBS (styrene-ethylene-butylene-styrene), into the polymer HTL. The addition of 10 wt% SEBS promotes a more ordered molecular packing of PM6. As a result, PbS QD solar cells achieved a power conversion efficiency of 11.43%, while the corresponding photodetectors exhibited a high specific detectivity of 2.12 × 1013 Jones—among the highest reported values. Beyond performance improvements, SEBS significantly enhances the mechanical flexibility of the HTLs. This work presents a new and effective strategy for simultaneously optimizing the optoelectronic performance and mechanical robustness of QD-based devices.
Quantum dot solar cells / Hole transport layer / Mechanical flexibility / Thermoplastic elastomer / Optoelectronic performance
2025 SIOC, CAS, Shanghai, & WILEY-VCH GmbH
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