TY - GEN
T1 - Nanoscale engineering of photoelectron processes by charging quantum dots
AU - Sergeev, Andrei
AU - Vagidov, Nizami
AU - Mitin, Vladimir
AU - Sablon, Kimberly
AU - Little, John
PY - 2012
Y1 - 2012
N2 - Novel approach to control of photoelectron processes is based on nanoscale engineering of 3D potential profile employing quantum dots with built-in charge (Q-BIC). Charging of quantum dots creates local potential barriers around single dots, if dots are arbitrary distributed in the medium, and collective barriers around dot clusters, rows etc, if quantum dots form specific structures. Manipulations with potential barriers provide an effective tool for suppression of fast capture processes of photocarriers by quantum dots. This allows one to increase the photocarrier lifetime and to reduce the recombination losses. The charging of dots also enhances the electron coupling to infrared radiation and multi-step absorption of sub-gap photons. Q-BIC nanomaterials have a number of attractive features to be used in photovoltaic and sensing applications.
AB - Novel approach to control of photoelectron processes is based on nanoscale engineering of 3D potential profile employing quantum dots with built-in charge (Q-BIC). Charging of quantum dots creates local potential barriers around single dots, if dots are arbitrary distributed in the medium, and collective barriers around dot clusters, rows etc, if quantum dots form specific structures. Manipulations with potential barriers provide an effective tool for suppression of fast capture processes of photocarriers by quantum dots. This allows one to increase the photocarrier lifetime and to reduce the recombination losses. The charging of dots also enhances the electron coupling to infrared radiation and multi-step absorption of sub-gap photons. Q-BIC nanomaterials have a number of attractive features to be used in photovoltaic and sensing applications.
KW - Infrared harvesting
KW - Photodetectors
KW - Photoelectron lifetime
KW - Photovoltaic nanomaterials
KW - Quantum dot media
UR - https://www.scopus.com/pages/publications/84869158494
U2 - 10.1109/NANO.2012.6322075
DO - 10.1109/NANO.2012.6322075
M3 - Conference contribution
AN - SCOPUS:84869158494
SN - 9781467321983
T3 - Proceedings of the IEEE Conference on Nanotechnology
BT - 2012 12th IEEE International Conference on Nanotechnology, NANO 2012
T2 - 2012 12th IEEE International Conference on Nanotechnology, NANO 2012
Y2 - 20 August 2012 through 23 August 2012
ER -