Publication

Modeling Performance and Degradation in Photoelectrodes

2024

Abstract

Coupled multi-physics modeling can reveal new insights into the processes that govern the performance and degradation of photoelectrodes under varying operation conditions. While many subprocesses have been studied to a great extent, a unified model for PEC device operation is still a work in progress. For example, recent studies use simplified models for the charge transport in the semiconductor or neglect the electrolyte species transport. Also, charge transfer theory at the semiconductor-electrolyte junction (SCEJ) coupled to the solid and liquid has been seldom investigated. Furthermore, the modeling of (time-dependent) degradation through (electro-)chemical corrosion has been initiated recently yet with simplified charge transfer and neglected species transport.

Official source

https://infoscience.epfl.ch/entities/publication/d04ee917-5da8-496c-a90e-a093845b0ab9

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2024

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/d04ee917-5da8-496c-a90e-a093845b0ab9

About this result

Related concepts (32)

Semiconductor

A semiconductor is a material which has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass. Its resistivity falls as its temperature rises; metals behave in the opposite way. Its conducting properties may be altered in useful ways by introducing impurities ("doping") into the crystal structure. When two differently doped regions exist in the same crystal, a semiconductor junction is created.

Doping (semiconductor)

In semiconductor production, doping is the intentional introduction of impurities into an intrinsic semiconductor for the purpose of modulating its electrical, optical and structural properties. The doped material is referred to as an extrinsic semiconductor. Small numbers of dopant atoms can change the ability of a semiconductor to conduct electricity. When on the order of one dopant atom is added per 100 million atoms, the doping is said to be low or light.

Semiconductor device

A semiconductor device is an electronic component that relies on the electronic properties of a semiconductor material (primarily silicon, germanium, and gallium arsenide, as well as organic semiconductors) for its function. Its conductivity lies between conductors and insulators. Semiconductor devices have replaced vacuum tubes in most applications. They conduct electric current in the solid state, rather than as free electrons across a vacuum (typically liberated by thermionic emission) or as free electrons and ions through an ionized gas.

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Modeling Performance and Degradation in Photoelectrodes

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