Colloidal CdSe Tetrapod Nanocrystals for Thin Film Transistors

Abstract

Researches of inorganic colloidal semiconductor nanocrystals for electronic and optoelectronic devices have been spotlighted for few decades because of superior electrical properties as well as well-known size and electrical energy-level tenability of them. However, performance of electronic devices with nanocrystals are not very remarkable than expected on account of energy barrier of interparticle hopping which inevitably appears in nanocrystal arrays. Herein, we studied the influence of particular nanocrystal structure, tetrapod, to overall electrical transport through nanocrystal arrays to propose another direction for improving electrical transport through nanocrystal arrays. We synthesized arm-length controlled CdSe tetrapod and, using them, fabricated coplanar TFT devices. The results revealed that electrical transport through nanocrystal array gets better as the tetrapod arm becomes longer. We expect that this study will be a considerable contribution to research field of electronics.