ORGS4-0576
Development Intrinsically Stretchable Organic Photodetectors Exhibiting Strain-Induced Detectivity Enhancement
Topic
GS4. Graduate Student Oral Session IV: Polymers for Electronics, Photonics, and Energy
When and Where
Sep 28, 2026
14:00 - 14:12
Room 104
Session Chairs
Hobeom KIM
Giwon LEE
Hyeong Jun KIM
Presenter(s)
Hyesu Jeon (Korea Advanced Institute of Science and Technology)
Co-Author(s)
Abstract
This work reports the development of the intrinsically stretchable organic photodetector (IS-OPD) that exhibits strain-induced detectivity (D) enhancement, enabled by designing a mechanically robust and efficient bilayer-type photoactive architecture (EBL-D). Specifically, we incorporate percolated polymer donor (PD):elastomer networks at the bottom layer, which simultaneously offer excellent stretchability and efficient charge transport. Subsequently, we deposit a small-molecule acceptor layer atop the PD:elastomer layer, expanding the optical absorption range into the near-infrared region while minimizing undesirable charge recombination. The resulting IS-OPD based on the EBL-D architecture maintains high responsivity and effectively suppresses dark current under strain. Consequently, the device exhibits 1.5-fold improvement in specific detectivity from 1.9×1013 to 2.8×1013 Jones at λ = 860 nm under 75% strain, corresponding to a 1.3-fold increase in D after accounting for the enlarged photoactive area, which is the first time to experimentally demonstrate strain-induced D enhancement in stretchable OPDs
