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

doi:10.1063/1.2807841

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

Chemical Engineering

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

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 language	English (US)
Article number	191113
Journal	Applied Physics Letters
Volume	91
Issue number	19
DOIs	https://doi.org/10.1063/1.2807841
State	Published - 2007

Bibliographical note

Funding Information:
This research is sponsored by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory (ORNL), managed by UT-Battelle, LLC for the US Department of Energy under Contract No. DEAC05-00OR22725.

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10.1063/1.2807841

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title = "Application of NaYF4: Yb, Er upconversion fluorescence nanocrystals for solution-processed near infrared photodetectors",

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.",

author = "Sun, {Cheng Jun} and Zhihua Xu and Bin Hu and Yi, {G. S.} and Chow, {G. M.} and Jian Shen",

note = "Funding Information: This research is sponsored by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory (ORNL), managed by UT-Battelle, LLC for the US Department of Energy under Contract No. DEAC05-00OR22725.",

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T2 - Yb, Er upconversion fluorescence nanocrystals for solution-processed near infrared photodetectors

AU - Sun, Cheng Jun

AU - Xu, Zhihua

AU - Hu, Bin

AU - Yi, G. S.

AU - Chow, G. M.

AU - Shen, Jian

N1 - Funding Information: This research is sponsored by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory (ORNL), managed by UT-Battelle, LLC for the US Department of Energy under Contract No. DEAC05-00OR22725.

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AB - 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.

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