High-performance dual hybrid perovskite photodetectors utilizing graphenes and gold nanostars
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초록
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Hybrid materials in optoelectronic devices can provide synergistic effects that enhance the properties of each component. Here, flexible high-performance perovskite hybrid photodetectors utilizing gold nanostars and graphenes are developed for strong light trapping with hot electron transfer and efficient light harvesting characteristics, respectively. While pristine perovskite photosensors do not exhibit discernible photodetecting properties because of low photon absorption and fast charge carrier recombination, graphene photosensors functionalized with GNSs and densely covered perovskite layer exhibit extraordinary photo-responsive properties with a photo-responsivity (R) of 5.90 × 104 AW-1 and specific detectivity (D*) of 1.31 × 1013 Jones, which are the highest among graphene-functionalized perovskite photosensors reported so far. This work provides a new design platform for flexible and high performance photo-detecting systems.