arXiv subjects

Zhenguo Ji

Publications and source records attributed to Zhenguo Ji.

3 recordsLinked to original sources

arXiv2016

Ultra-high oxidation potential of Ti/Cu-SnO2 anodes fabricated by spray pyrolysis for wastewater treatment

High oxidation potential indicates anodes have high oxidation power and high current efficiency for organics oxidation. In this paper, we prepared Ti/Cu-SnO2 anodes using spray pyrolysis method. The Ti/Cu-SnO2 anodes have an ultra-high oxidation potential of about 2.7 V vs NHE, suitable for use in wastewater treatment. The Ti/Cu-SnO2 anodes exhibit the preferred orientation along (110) plane at high Cu doped concentration. First-principles calculations suggest that work function of Cu-SnO2 increases with the Cu doping concentration. It is obtained that the preferred (110) plane and the high work function are responsible for the enhanced oxidation potential of Ti/Cu-SnO2 anodes.

cond-mat.mtrl-sci↗

arXiv2016

Effects of nickel doping on the preferred orientation and oxidation potential of Ti/Sb-SnO2 anodes prepared by spray pyrolysis

Nickel and antimony co-doped Ti/SnO2 (Ti/Ni-Sb-SnO2) anodes were prepared by spray pyrolysis. Effects of nickel concentration on the structure and onset potential for oxygen evolution of Ti/Ni-Sb-SnO2 anodes have been systematically investigated. XRD analyses suggest that SnO2 thin films grow in preferential orientation along (101) plane as the nickel concentration increases. The enhanced onset potential of oxygen is above 2.4 V vs NHE due to the introduction of nickel doping, and increases slightly with the nickel concentration. The calculated results show that work function of Ni/Sb co-doped SnO2 also increases with the Ni doping level, which contributes to the enhancement of onset potential for oxygen evolution.

cond-mat.mtrl-sci↗

arXiv2016

Understanding effects of TCO work function on the performance of organic solar cells by numerical simulation

The influences of work function of transparent conducting oxides (TCO) on the per-formance of organic solar cells, including open circuit voltage, conversion efficiency and fill factor, has been simulated. It is obtained that for non-Ohmic contact the open circuit voltage and conversion efficiency increase monotonically with the TCO work function but keep constant for Ohmic contact. Fill factor decreases and increases with the electrode work function when the electrode work function is below and above a critical value (4.2 eV for TCO and 4.5 eV for back-contact), respectively. The results of this simulation are significant in the choice of TCO contacts to optimize organic planar heterojunction solar cells.

physics.ins-det↗