Piezoresistive effects enhanced the photocatalytic properties of Cu2O/CuO nanorods

Composition Effects on Ultrafast Optical Properties of CuxOyThin Films: A Transient Absorption Study

“…These materials are also inexpensive and environmentally benign. ,− Cu 2 O (bandgap 1.9–2.6 eV), a natural p-type semiconductor, has extensively been studied for its excitonic behavior, but interest has recently shifted to potential solar cell applications . CuO (bandgap 0.8–1.8 eV), also a p-type semiconductor, − has shown promise in catalytic, gas sensing, and magnetic applications. By varying deposition conditions, the bandgaps for Cu 2 O and CuO can be tuned from 1.2 to 2.6 eV, making them versatile materials for solar absorption in photovoltaic devices. , In addition, due to favorable band edge misalignment that places the CuO valence band and conduction band lower than those of Cu 2 O and the potential charge separation mechanism, heterostructured Cu 2 O/CuO thin films or nanostructures have been proven to have better photocatalytic performance compared to Cu 2 O or CuO single-component materials. − For example, Jiang et al reported on CuO/Cu 2 O nanowires with methyl orange (MO) degradation rates 260 times higher than pure Cu 2 O .…”

Piezotronic and Piezophototronic Properties of Orthorhombic ZnSnN2 Fabricated Using Zn–Sn3N4 Composition Spreads through Combinatorial Reactive Sputtering

“…For example, the J D value at a bias of −5 V was enhanced 2.5 times when the applied pressure was increased from 0.625 to 2.5 GPa (red vertical double-headed arrow) for the piezophototronic effect, and a 50% increase in J D was observed at 2.5 GPa with and without illumination (orange vertical double-headed arrow). The piezoresistive effect was not considered because of the features of the exhibited I–V characteristics on the basis of our previous study . The J D values may be increased by modulating the alignment, morphology, and ZTN quantities on the substrate.…”

“…The piezoresistive effect was not considered because of the features of the exhibited I−V characteristics on the basis of our previous study. 42 The J D values may be increased by modulating the alignment, morphology, and ZTN quantities on the substrate. The aforementioned distinctive I−V characteristics (Figure 7a−c) provided an alternative approach for distinguishing the piezotronic or piezophototronic ZTN from Sn and Sn 3 N 4 and were also consistent with the XRD and XPS results.…”

Photoactivity of nanostructured porous Nb2O5: Effect of Pt, Ta, Cu, and Ti impregnation

“…Platinum has been used as a cocatalyst which is considered the most efficient element in the production of hydrogen, 24 but it is a noble metal, of high cost and scarcity 25 . Copper is a low‐cost transition metal and has been reported as an alternative to the use of platinum as a cocatalyst 26 ; in addition, copper oxide has photocatalytic action in the predominant range of the solar spectrum, the visible region, with bandgap energy of E g ≅ 1.9–2.2 eV 27 …”