Synthesis of blue-light-emitting ZnGa2O4 nanowires using chemical vapor deposition

Abstract

A high-density array of vertically aligned ZnGa(2)O(4) nanowires has been synthesized on Si substrates via CVD of ZnO-Ga at 1000 degrees C consisting of a single-crystalline cubic spinel structure grown in a [111] direction and exhibiting strong photoluminescence and cathodoluminescence in the blue wavelength region.

Facile route to straight ZnGa2O4 nanowires and their cathodoluminescence properties

“…A thin amorphous layer is found to attach on the surface of the nanowire and no obvious bulk defects such as stacking faults or dislocations are observed, indicating the well crystalline nature of the nanowires. From the FFT pattern and HRTEM result, we determine that the nanowires are grown along unusual [1 1 0] direction, which is not consistent with the reported [1 1 1] direction [11,19].…”

“…Up to now, the syntheses and their physical properties of ZnGa 2 O 4 nanowires have attracted more attentions and been successfully performed. Wellknown vapor-liquid-solid (VLS) and vapor-solid (VS) processes have been successfully applied in the synthesis of the ZnGa 2 O 4 nanowires [10][11][12][13][14]. Moreover, direct transformation of nanowires templates to ZnGa 2 O 4 nanowires had been achieved [15][16][17].…”

Enhancement of photoluminescence, persistent luminescence and photocatalytic activity in ZnGa2O4 phosphors by lithium ion doping

“…Some researchers report that ZnGa 2 O 4 emits different emission colors when doped with appropriate activators, Cr 3+ -doped ZnGa 2 O 4 phosphor emits a red long-lasting luminescence at 696 nm and Mn 2+ -doped ZnGa 2 O 4 phosphor exhibits a green luminescence at 503 nm [7]. Undoped ZnGa 2 O 4 phosphor exhibits a blue luminescence at 430 nm when it is synthesized in an oxidizing ambient at high temperature [8], while it shows an ultraviolet emission band around 360 nm when it is synthesized in a reducing ambient [9].…”

Synthesis of In-doped ZnGa2O4 nanobelts and its enhanced cathodoluminescence

“…high-chemical and thermal stability which is crucial for vacuum fluorescent displays and field emission displays [6]; (iv) it has good cathodoluminescence (CL) characteristics at low voltage [7,8]. By now, ZnGa 2 O 4 nanowires have been synthesized by different methods [9,10].…”