English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Understanding the carrier excitation and transport processes at thesingle-charge level plays a key role in quantum-dot-based solar cells andphotodetectors. Here, we report on Coulomb-induced giant photocurrentenhancement of positive charged trions (\emph{X$^+$}) in a singleself-assembled InAs/GaAs quantum dot embedded in an \emph{n-i-}Schottky deviceby high-resolution photocurrent (PC) spectroscopy. The Coulomb repulsionbetween the two holes in the \emph{X$^+$} increases the tunneling rate of thehole, and the remaining hole can be reused as the initial state to regenerate\emph{X$^+$} again. This process brings the PC amplitude of \emph{X$^+$} up to30 times larger than that of the neutral exciton. The analysis of the holetunneling time gives the equivalent change of hole tunnel barriers caused byCoulomb interaction between two holes with a value of 8.05 meV during thetunneling process. Our work brings a fundamental understanding of energyconversion for solar cells in nanoscale to improve internal quantum efficiencyfor energy harvesting.

Giant Photocurrent Enhancement by Coulomb Interaction in a Single Quantum Dot for Energy Harvesting