Tailored CsPbX3 Nanorods for Electron-Emission Nanodevices (original) (raw)

ACS Applied Nano Materials

Abstract

Going beyond much cultivated photovoltaic aspects of all inorganic lead halide perovskite, here we explored electron field emission of CsPbX3 nanorods, where X represents different halides, specifically Cl, Br, and I. Starting with room-temperature preparation of different perovskite nanorods, we examined their electron-emission behavior and found CsPbI3 as best electron emitter among the synthesized samples, which showed that low work function and high aspect ratio drove the best emission performance. Aspect ratios of the CsPbI3 nanorods were tailored via alteration of processing temperature. Nanorods prepared at 90 °C possessing maximum aspect ratio delivered a current density of 133 μA/cm2 at 8 V/μm applied external field. With an expectation of gaining better emission performance from as-synthesized optimized nanorods, reduced graphene oxide (rGO) was further attached to them. Relying on the emission beneficial electronic features of rGO as-prepared CsPbI3-rGO composite delivered significantly improve...

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