Ag and Cu doped colloidal CdSe nanocrystals: partial cation exchange and luminescence
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DOI: 10.1088/2053-1591/2/8/085004
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摘要: Partial cation exchange was employed to dope pre-formed colloidal CdSe nanocrystals with Ag+ and Cu2+ ions. Unusual photoluminescence (PL) properties were observed after these partial reactions. Intensity of excitonic PL increases by ~4 times at low level doping (1.3 dopant per nanocrystal). However, systematic study shows that the ions do not enhance emission. Instead, better surface passivation trioctylphosphine used during is responsible for enhancement PL. As concentration increases, intensity decreases, a new dopant-related emission emerges.
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