Optimization schemes for efficient multiple exciton generation and extraction in colloidal quantum dots

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Abstract

Multiple exciton generation (MEG) is a process in which more than one electron hole pair is generated per absorbed photon. It allows us to increase the efficiency of solar energy harvesting. Experimental studies have shown the multiple exciton generation yield of 1.2 in isolated colloidal quantum dots. However real photoelectric devices require the extraction of electron hole pairs to electric contacts. We provide a systematic study of the corresponding quantum coherent processes including extraction and injection and show that a proper design of extraction and injection rates enhances the yield significantly up to values around 1.6.

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  • Physical Sciences
Original languageEnglish
Article number064703
JournalJournal of Chemical Physics
Volume145
Issue number6
Publication statusPublished - 2016 Aug 14
Publication categoryResearch
Peer-reviewedYes

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