Enhancement of surface morphology and optical properties of nanocolumnar ZnO films

Al-doped ZnO mechanical milled powders for dye sensitized cells

“…This means that light absorbed transitions increase as milling time decreases. Similar results with dopants incorporation were observed in a previous work for Al-doped ZnO powders, and also for films prepared by electrodeposition [22][23][24]. Comparing Al 2 O 3 -doped ZnO powders with Al-doped ZnO powders, those Al 2 O 3 -doped ZnO powders seems to have better reflectivity being, in principle, proper basic elements for the development of solar cells.…”

“…It is proven that ZnO is an excellent material because of its good optical and electronic properties for the development of solar cells [5]; which can be improved by n-type doping with aluminium and indium [6,7]. Since semiconductor doping is not an easy task, a variety of methods have been tested such as electrodeposition, pulsed laser deposition, radio frequency magnetron sputtering, etc., for obtaining ZnO films and powders with different dopants [8][9][10][11][12][13][14][15][16]. In this study we present zinc oxide nanoparticles which optical and electrical properties have been modified by the Al 2 O 3 presence acting as small quantities of dopant using mechanical milling.…”

Influence of annealing temperature on photoluminescence properties and optical constants of N-doped ZnO thin films grown on muscovite mica substrates

“…1. This indicates an improvement in the crystallinity of the films with annealing and a decrease in the width of the shallow donor band [20]. In the visible region, defect-related deep-level (DL) emissions were observed widely for annealed NZO thin films, indicating the formation of intrinsic defects in the ZnO lattice by the diffusion of surface atoms during annealing.…”

Trivalent dopants on ZnO semiconductor obtained by mechanical milling

“…Semiconductor doping is not a trivial task although a great variety of methods were applied yielding, not always, a successful result. Techniques such as electrodeposition, pulsed laser deposition (PLD), radio frequency magnetron sputtering, chemical vapor deposition, electron beam evaporation, spray pyrolysis and recently, mechanical alloying have been applied to obtained ZnO films and powders with different dopants [8][9][10][11][12][13][14][15]. The aim of this study is to improve the compatibility of both compounds present in the bulk heterojunction in blend materials-based photovoltaic solar cells.…”