Enhanced visible and near infrared emissions viaCe super(3+) to Ln super(3+) energy transfer in Ln super(3+)-doped CeF sub(3) nanocrystals (Ln = Nd and Sm)

We report the enhancement of both visible and near infrared (NIR) emissions from Nd super(3+) ions viaCe super(3+) sensitization in colloidal nanocrystals for the first time. This is achieved in citrate capped Nd super(3+)-doped CeF sub(3) nanocrystals under ultraviolet (UV) irradiation ( lambda sub...

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2015-12, Vol.45 (1), p.78-84
Main Authors: Samanta, Tuhin, Sarkar, Shyam, Adusumalli, VenkataNKB, Praveen, Athma E, Mahalingam, Venkataramanan
Format: Article
Language:English
Subjects:
Capping
Emission
Energy transfer
Irradiation
Lasing
Microwaves
Nanocrystals
Near infrared radiation
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Summary:We report the enhancement of both visible and near infrared (NIR) emissions from Nd super(3+) ions viaCe super(3+) sensitization in colloidal nanocrystals for the first time. This is achieved in citrate capped Nd super(3+)-doped CeF sub(3) nanocrystals under ultraviolet (UV) irradiation ( lambda sub(ex) = 282 nm). The lasing transition ( super(4)F sub(3/2) arrow right super(4)I sub(11/2)) at 1064 nm from Nd super(3+)-doped CeF sub(3) nanocrystals has much higher emission intensity viaCe super(3+) ion sensitization compared to the direct excitation of Nd super(3+) ions. The nanocrystals were prepared using a simple microwave irradiation route. Moreover, the study has been extended to Sm super(3+)-doped CeF sub(3) nanocrystals which show strong characteristic emissions of Sm super(3+) ions viaenergy transfer from Ce super(3+) ions. The energy transfer mechanism from Ce super(3+) to Nd super(3+) and Sm super(3+) ions is proposed.
ISSN:1477-9226
1477-9234
DOI:10.1039/c5dt02974k