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

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Optimization schemes for efficient multiple exciton generation and extraction in colloidal quantum dots. / Damtie, Fikeraddis A.; Karki, Khadga J.; Pullerits, Tönu; Wacker, Andreas.

I: Journal of Chemical Physics, Vol. 145, Nr. 6, 064703, 14.08.2016.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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TY - JOUR

T1 - Optimization schemes for efficient multiple exciton generation and extraction in colloidal quantum dots

AU - Damtie, Fikeraddis A.

AU - Karki, Khadga J.

AU - Pullerits, Tönu

AU - Wacker, Andreas

PY - 2016/8/14

Y1 - 2016/8/14

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84982113307&partnerID=8YFLogxK

U2 - 10.1063/1.4960507

DO - 10.1063/1.4960507

M3 - Article

VL - 145

JO - Journal of Chemical Physics

T2 - Journal of Chemical Physics

JF - Journal of Chemical Physics

SN - 0021-9606

IS - 6

M1 - 064703

ER -