Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 113, Issue 5, Pages 1886-1890Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp808190v
Keywords
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Funding
- CAS Hundred Talents
- National Natural Science Foundation of China [60771051, 60601015, 60601014, 10674132, 20603035, 10874179]
- National High Technology Development Program [2006AA03Z335]
- NSF SBIR [0638209]
- CAS of China
- KNAW of The Netherlands
- Directorate For Engineering
- Div Of Industrial Innovation & Partnersh [0638209] Funding Source: National Science Foundation
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Photoluminescence quenching of colloidal CdSe core/shell quantum dots (QDs) with US, ZnS and CdS/CdZnS/ZnS shells in the presence of hole-transporting materials (HTMs) is studied by means of steady-state and time-resolved photoluminescence spectroscopy. Static quenching is surprisingly found to play an even more important role in the PL quenching process than the dynamic one originating front a hole transfer from QDs to HTMs. The static quenching efficiency of the QDs with single US shells of 3 and 6 monolayers is much larger than that of the QDs with a multilayer CdS/CdZnS/ZnS shell. The experimental results are important for understanding the control of the static quenching pathways in QDs by using multishell structures.
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