Open AccessElectron extraction from excited quantum dots with higher order coulomb scattering
Author(s) -
Alex Arash Sand Kalaee,
Andreas Wacker
Publication year - 2020
Publication title -
journal of physics communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.407
H-Index - 17
ISSN - 2399-6528
DOI - 10.1088/2399-6528/ab7e85
Subject(s) - excited state , quantum tunnelling , quantum dot , relaxation (psychology) , electron , physics , extraction (chemistry) , atomic physics , coulomb , scattering , condensed matter physics , molecular physics , chemistry , quantum mechanics , chromatography , psychology , social psychology
The electron kinetics in nanowire-based hot-carrier solar cells is studied, where both relaxation and extraction are considered concurrently. Our kinetics is formulated in the many-particle basis of the interacting system. Detailed comparison with simplified calculations based on product states shows that this includes the Coulomb interaction both in lowest and higher orders. While relaxation rates of 1 ps are obtained, if lowest order processes are available, timescales of tens of ps arise if these are not allowed for particular designs and initial conditions. Based on these calculations we quantify the second order effects and discuss the extraction efficiency, which remains low unless an energy filter by resonant tunnelling is applied.