DPG Phi
Verhandlungen
Verhandlungen
DPG

Dresden 2017 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

HL: Fachverband Halbleiterphysik

HL 90: Inhomogeneous Materials for Solar Cells

HL 90.6: Talk

Friday, March 24, 2017, 12:45–13:00, POT 81

Intermediate gap states in core/shell nanoparticles for solar energy conversion — •Musa Alaydrus1, Marton Vörös2, Gergely Zimanyi3, and Stefan Wippermann11Max-Planck-Institut für Eisenforschung, Düsseldorf, Germany — 2Argonne National Lab, Chicago, USA — 3University of California, Davis, USA

Multi-exciton generation (MEG) and intermediate band (IB) transitions in semiconducting nanoparticles (NPs) are promising paths towards surpassing the Shockley-Queisser limit in solar energy conversion devices. Recent studies demonstrate MEG to be more efficient in NPs than in the bulk. However, quantum confinement effects believed to be responsible for efficient MEG in NPs, also increase their optical gap, swiftly shifting the MEG threshold beyond the solar spectrum. We propose to introduce intermediate states inside the gap to lower the optical absorption threshold and possibly provide additional pathways for multi-exciton processes at energies lower than the fundamental NP gap. We investigate the formation of such intermediate states in core/shell NPs from first principles.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2017 > Dresden