AgInS 2 -ZnS Quantum Dots: Excited State Interactions with TiO 2 and Photovoltaic Performance.

Autor: Kobosko SM; Radiation Laboratory, ‡Department of Chemical and Biomolecular Engineering, and §Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States., Jara DH; Radiation Laboratory, ‡Department of Chemical and Biomolecular Engineering, and §Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States., Kamat PV; Radiation Laboratory, ‡Department of Chemical and Biomolecular Engineering, and §Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States.
Jazyk: angličtina
Zdroj: ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2017 Oct 04; Vol. 9 (39), pp. 33379-33388. Date of Electronic Publication: 2017 Feb 03.
DOI: 10.1021/acsami.6b14604
Abstrakt: Multinary quantum dots such as AgInS 2 and alloyed AgInS 2 -ZnS are an emerging class of semiconductor materials for applications in photovoltaic and display devices. The nanocrystals of (AgInS 2 ) x -(ZnS) 1-x (for x = 0.67) exhibit a broad emission with a maximum at 623 nm and interact strongly with TiO 2 nanostructures by injecting electrons from the excited state. The electron transfer rate constant as determined from transient absorption spectroscopy was 1.8 × 10 10 s -1 . The photovoltaic performance was evaluated over a period of a few weeks to demonstrate the stability of AgInS 2 -ZnS when utilized as sensitizers in solar cells. We report a power conversion efficiency of 2.25% of our champion cell 1 month after its fabrication. The limitations of AgInS 2 -ZnS nanocrystals in achieving greater solar cell efficiency are discussed.
Databáze: MEDLINE
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