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