2018
DOI: 10.1002/aelm.201700395
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Computation of Electronic Energy Band Diagrams for Piezotronic Semiconductor and Electrochemical Systems

Abstract: Electronic energy band diagrams provide useful and illustrative information on how material stacking might affect electronic properties and charge transport throughout a multijunction device. However, schematic diagrams, which are often used in many publications, lack quantified changes in potential across junction interfaces. This is especially true as the energetics become increasingly unintuitive when incorporating the effects of dielectric layers and applying ferroelectric and piezoelectric charges, such a… Show more

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Cited by 16 publications
(8 citation statements)
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References 55 publications
(90 reference statements)
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“…The internal piezo‐potential serves as a bias to alter the charge energy at the surface of materials, and occurrence of various reactions is determined by whether the electronic energy level satisfy the energy requirement (redox potential) of desired electrochemical reaction. [ 54,55 ]…”
Section: Piezocatalysismentioning
confidence: 99%
See 1 more Smart Citation
“…The internal piezo‐potential serves as a bias to alter the charge energy at the surface of materials, and occurrence of various reactions is determined by whether the electronic energy level satisfy the energy requirement (redox potential) of desired electrochemical reaction. [ 54,55 ]…”
Section: Piezocatalysismentioning
confidence: 99%
“…The internal piezo-potential serves as a bias to alter the charge energy at the surface of materials, and occurrence of various reactions is determined by whether the electronic energy level satisfy the energy requirement (redox potential) of desired electrochemical reaction. [54,55] For piezoelectric semiconductor (with free charge carrier densities of 10 14 -10 18 cm −3 ) under stress, free charge carriers will directionally flow to poles of materials and screen the piezo-potential, therefore weakening this driven force. [56] So continuous oscillatory of materials to restore the electric field is required during piezocatalytic process.…”
Section: Piezocatalysismentioning
confidence: 99%
“…Furthermore, the poled porous BaTiO3 pellets were subjected to ultrasonic waves to determine their piezocatalytic activity when loaded at similar conditions to ultrasound activated piezocatalysis. The poled pellets were electroded with silver paste before being submerged in deionized water, where it can be from Figure 6 During the piezocatalysis process, the mechanical stress induces a local polarization which can be used for controlling generation of carriers, and their seperation, transportation, and recombination of charges depends on the electronic state of piezocatalyst [51][52][53][54] . The piezocatalysis process is similar to conventional electrocatalysis process, however an external power source separates the charge (electron) during piezocatalysis, whereas during the electrocatalysis process the electrical potential separates the charge (electron).…”
Section: Resultsmentioning
confidence: 99%
“…Electronic energy band diagrams are commonly used to illustrate how piezoelectric or ferroelectric effect might affect electronic properties and charge transport throughout a multijunction device. While most previous work used schematic diagrams to illustrate the potential change at heterojunction, German et al recently presented a band diagram computation for a series of complex heterojunctions that are often seen in piezotronic systems . The calculation started from the Poisson equation and was directed by the facts that the potential of two junction components should be equal at the interface and the total system charge should be neutralized.…”
Section: Piezotronics‐tuned Solid/liquid Heterojunctionsmentioning
confidence: 99%
“…a) Calculated electrical potential profile of an unstrained ZnO/insulator/solution interface as a function of solution pH at pH iso = 9.5 and ε r,Insulator = 10. b) Calculated electrical potential profile of an unstrained semiconductor/insulator/solution interface as a function of the isoelectric point of the solution‐facing material at pH = 14 and ε r,Insulator = 10. c) Calculated electrical potential profile across the heterojunction as a function of the electrical permittivity of the insulating material at pH = 14 and pH iso = 9.5. d) Calculated electrical potential profile across the heterojunction interface as a function of the piezoelectric‐semiconductor's strain at pH = 14, pH iso = 9.5, and ε r,Insulator = 10. Reproduced with permission . Copyright 2018, Wiley‐VCH.…”
Section: Piezotronics‐tuned Solid/liquid Heterojunctionsmentioning
confidence: 99%