One-dimensional CdSxSe1−x nanoribbons for high-performance rigid and flexible photodetectors

Abstract

High quality one-dimensional (1D) single crystalline cadmium sulfide selenide (CdS_xSe_1−x) nanoribbons were synthesized via a one-step metal-catalyzed physical evaporation route. The as-synthesized ternary nanoribbons were employed to construct two terminal contact photodetectors on both rigid (Si/SiO₂) substrates and flexible polyethylene terephthalate (PET) substrates. The flexible photodetectors exhibited an ultrahigh current on–off ratio of about 4 × 10⁶, a high responsivity of 1.24 × 10³ A W⁻¹, excellent reversible switching stability properties, and a response time and a recovery time of 0.56 s and 0.8 s, respectively. In addition, the as-prepared flexible photodetector displayed excellent mechanical and electrical stability. These results indicate that the 1D CdS_xSe_1−x nanoribbons are promising candidates for constructing rigid and flexible optoelectronic devices.