Application of NaYF4

Yb, Er upconversion fluorescence nanocrystals for solution-processed near infrared photodetectors

Cheng Jun Sun, Zhihua Xu, Bin Hu, G. S. Yi, G. M. Chow, Jian Shen

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

In an attempt to overcome the technical challenges in the conventional solution-processed near infrared (NIR) photodetectors, we have used NaY F4: Yb, Er upconversion fluorescence nanocrystals to replace the semiconductor quantum dots in conjugated polymers. Under NIR excitation, the NaY F4: Yb, Er nanocrystals emit visible light in the solution-processed NIR photodetectors. The emitted visible light is simultaneously absorbed by the host conjugated polymer to generate photocurrent, which indicates that our approach is applicable to fabricate NIR photodetectors while avoiding the major technical challenges associated with semiconductor quantum dot based NIR photodetectors.

Original languageEnglish (US)
Article number191113
JournalApplied Physics Letters
Volume91
Issue number19
DOIs
StatePublished - Nov 19 2007

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photometers
nanocrystals
fluorescence
quantum dots
polymers
photocurrents
excitation

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Application of NaYF4 : Yb, Er upconversion fluorescence nanocrystals for solution-processed near infrared photodetectors. / Sun, Cheng Jun; Xu, Zhihua; Hu, Bin; Yi, G. S.; Chow, G. M.; Shen, Jian.

In: Applied Physics Letters, Vol. 91, No. 19, 191113, 19.11.2007.

Research output: Contribution to journalArticle

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