Fast colloidal synthesis of SnSe2 nanosheets for flexible broad-band photodetection

Abstract

A new rapid bottom-up colloidal synthetic route has been developed to synthesize SnSe₂ nanosheets within 5 min. A SnSe₂ nanosheet-based flexible photodetector is fabricated for the first time on a polyethylene terephthalate substrate patterned with interdigital Au electrodes. Moreover, the resulting device displays a wide photodetection range (covering 405 to 1064 nm with a photoresponsivity of up to 18.5 mA W⁻¹) and high flexibility.