Bilayer vertical bulk heterojunction for high-sensitivity conformable organic phototransistors

Le résumé fourni par la source

Conformable organic phototransistors (OPTs) are promising for wearable and biomedical optoelectronics but are limited by insufficient light absorption and inefficient exciton dissociation processes. Here, a bilayer vertical bulk heterojunction (BV-BHJ) is developed via a floating film transfer method using IDT-BT and N2200. The structure integrates vertical phase-separated bulk heterojunctions in both layers with an additional interfacial planar heterojunction, enabling synergistic enhancement of exciton generation, dissociation, and carrier transport. The resulting device exhibits a photosensitivity ( P ) as high as 1.58 × 10 6 with excellent mechanical conformability. This work provides an effective strategy for high-performance conformable phototransistors.

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