Exciton Multiplication and Relaxation Dynamics in Quantum Dots: Applications to Ultra-High Efficiency Solar Photon Conversion

Research output: Contribution to conferencePaperpeer-review

3 Scopus Citations

Abstract

We show how semiconductor quantum dots may greatly increase photon conversion efficiencies by producing multiple excitons from a single photon. This is possible because quantization of energy levels in quantum dots enhances Auger processes, eliminates the requirement to conserve crystal momentum, and thus promotes multiple exciton generation, Quantum yields of 300% for exciton formation in PbSe, PbS, and PbTe quantum dots have been reported at photon energies about 4 times the HOMO-LUMO transition energy (QD bandgap), indicating the formation of 3 excitons/photon for all photoexcited quantum dots.

Original languageAmerican English
Pages40-44
Number of pages5
DOIs
StatePublished - 2006
Event2006 IEEE 4th World Conference on Photovoltaic Energy Conversion, WCPEC-4 - Waikoloa, HI, United States
Duration: 7 May 200612 May 2006

Conference

Conference2006 IEEE 4th World Conference on Photovoltaic Energy Conversion, WCPEC-4
Country/TerritoryUnited States
CityWaikoloa, HI
Period7/05/0612/05/06

NREL Publication Number

  • NREL/CP-520-41282

Fingerprint

Dive into the research topics of 'Exciton Multiplication and Relaxation Dynamics in Quantum Dots: Applications to Ultra-High Efficiency Solar Photon Conversion'. Together they form a unique fingerprint.

Cite this