Energy Efficiency of Optoelectronic Devices in Simulated Polluted Conditions

摘要

Background: The energy efficiency of optoelectronic devices in aqueous solutions was derived using a simple mathematical criterion. The criterion was based on calculating the limit of the ratio value of the conductivity of an optoelectronic material in aqueous solution (σ_s) to the conductivity of the optoelectronic material in air (σ_(air)). In other words, the criterion; lim (σ_s/σ_(air)) =1 was applied to determine the energy efficiency of the optoelectronic material in the aqueous solution when σ_s became equal (decreased) to σ_(air) as a function of time of the exposure of the material to the aqueous solution. The values of σ_s and σ_(air) were determined by the electrochemical impedance spectroscopy (EIS). The energy efficiency of an optoelectronic devise, i.e., computer disc (CD) material, was evaluated in distilled water and polluted water with a predetermined period of optoelectronic operations. Methods: The electrochemical impedance spectroscopy (EIS) was used to determine values of σ_s and σ_(air) of the computer disc (CD) material, Al_2O_3, in distilled water and a polluted water. Results: The energy efficiency of the computer disc (CD) material, Al_2O_3, was evaluated in distilled water and polluted water with a predetermined period of 12 months. Conclusion: A derived analytical model (lim (σ_s/σ_(air)) =1, as σ_s →σ_(air)) of the energy efficiency of optoelectronic materials was used to Plot; lim (σ_s/σ_(air)) vs. time of exposure of the pure Al, Al_2O_3, and Al_2O_3 in air, distilled water, and polluted water, respectively. Therefore, plots of the lim (σ_s/σ_(air)) vs. time of exposure like those of Figs. (2-4) can be standard plots of energy efficiency for different kinds of optoelectronic material.