Abstract
Flexible photodetectors from 405 to 980nm based on HfSe3 or HfS3 nanobelts (NBs)/graphene composites were fabricated on polypropylene (PP) films. Compared with HfSe3 or HfS3 NB photodetectors, the flexible composite photodetector showed enhancement of photoresponsivity. For substance, under the illumination light of 405nm (14.4mW/cm2), the responsivities of HfSe3 NBs, HfSe3 NBs/GO (graphene oxide) and HfSe3 NBs/RGO (reduced graphene oxide) photodetectors were 1.1×10−4, 4.3×10−3 and 0.5 (mA/W), respectively, while those of HfS3 NBs, HfS3 NBs/GO and HfS3 NBs/RGO photodetectors were 0.11, 0.92 and 0.55 (mA/W), respectively. Meanwhile, these photodetectors exhibited excellent durability and stability after they were placed for 3 months and bended 500 times. So the composites are promising optoelectronic materials, and the flexible photodetectors are high-performance photodetectors from visible to near-infrared.
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