Vapour–liquid–solid-assisted growth of cadmium telluride nanowires and their field emission properties

• Published in: Micro & nano letters 2016-03, Vol.11 (3), p.160-163
• Main Authors: Bagal, Vivekanand S, Patil, Girish P, Suryawanshi, Sachin R, More, Mahendra A, Chavan, Padmakar G
• Format: Article
• Language: English
• Subjects: Cadmium; cadmium compounds; cadmium telluride nanowires; Cadmium tellurides; CdTe; current 1 muA; Current density; EDX; electric field; emission current density; energy‐dispersive X‐ray analysis; FESEM; Field emission; field emission electron microscopy; field emission properties; field emission scanning electron microscope; II‐VI semiconductors; Intermetallics; I‐t characteristics; J‐E characteristics; maximum current density; nanofabrication; Nanowires; overall emission current nature; photoluminescence; planar diode configuration; pressure 0.00000001 mbar; scanning electron microscopy; semiconductor growth; silicon substrate; Silicon substrates; temperature 293 K to 298 K; thermal evaporation method; time 3 h; turn‐on field; vapour‐liquid‐solid‐assisted growth; wide band gap semiconductors; X-rays; XRD; X‐ray chemical analysis; X‐ray diffraction
• ISSN: 1750-0443; 1750-0443
• DOI: 10.1049/mnl.2015.0411

Cadmium telluride (CdTe) nanowires were grown on silicon substrate (100) by thermal evaporation method. The synthesised CdTe nanowires were characterised by X-ray diffraction, field emission scanning electron microscope, energy-dispersive analysis of X-ray, and photoluminescence techniques. The field emission characteristics have been investigated at room temperature. The J–E and I–t characteristics were measured in a planar diode configuration at the base pressure of 1 × 10−8 mbar. Turn-on field defined for the emission current density of 0.1 µA/cm2 has been found to be 2.2 V/µm and on the application of high applied electric field of 7.8 V/µm maximum current density of 210 µA/cm2 has been achieved. The I–t measurement has been studied at the preset of 1 µA emission current for the duration of 3 h. Overall nature of emission current has been seen to stable for duration of the measurement. To the best of the authors’ knowledge, this is a first report on field emission study of CdTe nanowires.