Structural, electrical and optical properties of Mg-doped CuAlO₂ films by pulsed laser deposition

Abstract

P-type Mg doped CuAlO2 films with high crystallinity are prepared by pulsed laser deposition followed by annealing, and exhibit enhanced conductivity and tunable optical band gaps.

Strong temperature-dependent crystallization, phase transition, optical and electrical characteristics of p-type CuAlO2thin films

“…The crystallinity of the films grown at elevated temperature by the single-step process is significantly improved as compared with the previous reports which yielded poor crystallinity and impurity phases such as Cu 2 O, CuAl 2 O 4 , Al 2 O 3 and CuO. [19][20][21][22][23][24][25][26][27][28][29][30] The phase evolution with respect to the growth temperature for CuAlO 2 is considered to be controlled by the thermodynamic characteristics of CuAlO 19 This diagram clearly suggests that highly crystallized and phase-pure r-CuAlO 2 films should (could only) be fabricated in an extremely narrow temperature window, in addition, with proper chemical configurations. Thus, it is important to investigate the chemical composition of as-deposited films, which are responsible for the formation of different phases.…”

“…Post-annealing at a high temperature for its equilibrium existence (B1000-1100 1C) was indispensably adopted to improve the crystal quality, which however induced uncontrollable impurity phases such as Cu 2 O, CuO, CuAl 2 O 4 and Al 2 O 3 . [19][20][21][22][23][24][25][26][27][28][29][30] Such a situation impedes many critical technological developments.…”

Development of CuAlO2-Encapsulated Reduced Graphene Oxide Nanocomposites: An Efficient and Selective Electrocatalyst for Detection of Neurodegenerative Disorders

“…In rGO/CuAlO 2 (Figure d), the main broad peak at 284.3 eV and the peaks at 286.2 and 288.9 eV are attributed to the residual oxygen-containing groups. The observance of an oxygenated weaker peak suggests the deoxygenation of GO and the formation of rGO . The enhancement in C–O ratio in rGO sheets can serve as a conductive channel between the CuAlO 2 microspheres and is favorable for the sensing process.…”

“…The observance of an oxygenated weaker peak suggests the deoxygenation of GO and the formation of rGO. 39 The enhancement in C−O ratio in rGO sheets can serve as a conductive channel between the CuAlO 2 microspheres and is favorable for the sensing process. The O 1s peak at 531.09, 531.24, and 531.35 eV for GO, rGO, and rGO/CuAlO 2 nanocomposites indicates the presence of chemisorbed Ocontaining species, attributed to the lattice oxygen as presented in Figure 5e.…”

Inorganic p‐Type Semiconductors as Hole Conductor Building Blocks for Robust Perovskite Solar Cells

“…p‐Type delafossite oxide CuAlO 2 has been reported to show some prominent advantages, such as excellent transparency in the visible region, conductivity as high as 1 S cm −1 , thermal and ambient stability, and can be easily synthesized from easily accessible, low‐cost, and nontoxic elements . The first application of CuAlO 2 film in PSCs is fabricated via a magnetron sputtering method.…”