Mechanistic investigation on tuning the conductivity type of cuprous oxide (Cu2O) thin films via deposition potential

Texture and Bandgap Tuning of Phase Pure Cu2o Thin Films Grown By a Simple Potentiostatic Electrodeposition Technique

“…The pristine copper-oxide films grown by using deposition voltages up to -1.0 V were found to be single phase Cu2O and those grown at -2.0 V and above (data not shown here) were found to be metallic copper (Cu) with (111) and ( 200) orientation (see the top panel in Figure 3(a)). Additionally, the surface morphology of metallic Cu revealed that it is composed of spherical shaped grains of dia.~ 1.0 ± 0.3 µm and significantly different from the morphology of Cu2O thin films as also seen by others 7 . In fact, a coherent photoactive layer with large grains is desirable for light harvesting applications due to the possible reduction of recombination at the grain boundaries.…”

“…Figure 1 (b) shows the transient cathodic current during the electrodeposition of copper-oxide thin films at -0.8 V (black curve) and -1.5 V (green curve). The cathodic current at these two different deposition voltages are seen to be quite stable within the deposition span indicating a good and fast growth kinetic 7 . The thicknesses (t) of the copper-oxide films electrodeposited at -1.0 V for 20 min (t~8.08±0.19 µm), 40 min (t~8.08±0.19 µm), and 80 min (t~8.08±0.19 µm) are found to be almost uniform across the wide area of films as evident from Figure 1 (c).…”

“…Single phase Cu2O with desired crystallographic orientation can be grown both by physical 1,4 and wet-chemical techniques 2,[6][7][8] . Among the wet-chemical techniques, electrodeposition (ED) is simple, economical, and offers good control over large deposition parameters for producing single phase Cu2O films with controlled texture and thickness 2,[6][7] . Both, 2-electrode galvanostatic 6 and 3-electrode potentiostatic 2,7 mode ED of Cu2O thin films were reported.…”

“…Among the wet-chemical techniques, electrodeposition (ED) is simple, economical, and offers good control over large deposition parameters for producing single phase Cu2O films with controlled texture and thickness 2,[6][7] . Both, 2-electrode galvanostatic 6 and 3-electrode potentiostatic 2,7 mode ED of Cu2O thin films were reported. In this study, we report a very simple 2-electrode potentiostatic ED technique for tuning texture and optical bandgap of the single phase Cu2O films and discussed their physical properties as a function of deposition voltages.…”

Different Enhancement Mechanisms of the Anodizing Al‐Doped or Sn‐Coupled Ti3SiC2 for the Photoelectrochemical Performance

“…With the assistance of solar energy, pollutants are degraded by photocatalytic reactions and photons are converted into photocarriers in the solar cell . Hence, the semiconductor as the main component of solar energy conversion materials requires efficient light harvesting, stability, fast carrier generation and separation . TiO 2 semiconductor material possesses the well electrical and optical characteristics and is widely studied in environmental decontamination and energy conversion systems .…”