Light and electric field induced unusual large-scale charge separation in hybrid semiconductor objects
Language
en
Article de revue
This item was published in
Physical Chemistry Chemical Physics. 2020
Royal Society of Chemistry
English Abstract
Separation of electric charges is the most crucial phenomenon in natural photosynthesis, and also extremely important for many artificial energy conversion systems based on semiconductors. The usual roadblock in this context ...Read more >
Separation of electric charges is the most crucial phenomenon in natural photosynthesis, and also extremely important for many artificial energy conversion systems based on semiconductors. The usual roadblock in this context is the fast recombination of electrons and holes. Here we demonstrate that the synergy of light and electric fields allows separating very efficiently electric charges over an unusually large distance in TiO2. The generated internal electric field can also be used to shuttle electrons simultaneously to the two opposite sides of a hybrid TiO2-polyaniline object. This counterintuitive behavior is based on the combination of the principles of bipolar electrochemistry and semi-conductor physics.Read less <
English Keywords
Bipolar electrochemistry
semiconductors
electrodeposition
photoelectrochemistry
charge separation
European Project
Electrochemically induced asymmetry
Origin
Hal imported