Synergetically enhanced near-infrared photoresponse of reduced graphene oxide by upconversion and gold plasmon

Wenbin Niu; Hu Chen; Rui Chen; Jingfeng Huang; Alagappan Palaniappan; Handong Sun; Bo Gunnar Liedberg; Alfred Iing Yoong Tok

doi:10.1002/smll.201400400

Synergetically enhanced near-infrared photoresponse of reduced graphene oxide by upconversion and gold plasmon

Small. 2014 Sep 24;10(18):3637-43. doi: 10.1002/smll.201400400. Epub 2014 May 12.

Authors

Wenbin Niu¹, Hu Chen, Rui Chen, Jingfeng Huang, Alagappan Palaniappan, Handong Sun, Bo Gunnar Liedberg, Alfred Iing Yoong Tok

Affiliation

¹ School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.

PMID: 24821086
DOI: 10.1002/smll.201400400

Abstract

A new route to improve responsivity of reduced graphene oxide (rGO)-based near-infrared photodetectors is reported by coupling upconversion and gold plasmon. Near-infrared light is converted by upconversion nanoparticle into shorter wavelengths that can readily be absorbed by rGO. Further coupling of plasmonic layer increased upconversion emissions and rGO absorption, resulting in an overall enhancement of photo-responsivity by 10 times.

Keywords: gold plasmon; near-infrared photodetectors; reduced graphene oxide; upconversion nanoparticles.