Hybrid structures of organic dye and graphene for ultrahigh gain photodetectors

Youngbin Lee, Seong Hun Yu, Jiwon Jeon, Hyunmin Kim, Jun Young Lee, Hyungjun Kim, Jong Hyun Ahn, Euyheon Hwang, Jeong Ho Cho

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

Abstract A hybrid structure comprising organic dye molecules (e.g., rhodamine 6G) and graphene was developed for the realization of high-performance optoelectronic devices. The fabricated photodetector offered a broad spectral photo-response across wavelengths in the infrared, visible, and ultraviolet regions, as well as a high responsivity (∼460 A/W at illumination power of 1 μW). The photocurrent generated in the hybrid photodetector (∼mA) was much higher than that generated in a pristine graphene photodetector (<μA). The performance of the dye-sensitized photodetector relied on enhanced photoabsorption and the implementation of a photocurrent gain arising from the photo-excited charges.

Original languageEnglish
Article number9739
Pages (from-to)165-172
Number of pages8
JournalCarbon
Volume88
DOIs
Publication statusPublished - 2015 Jul 1

Bibliographical note

Funding Information:
This work was supported by Basic Science Research Program (2013R1A1A2011897, 2009-0083540, and 2014R1A2A2A01006776) of the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planing , Korea. H. Kim acknowledges the provision of DGIST basic research program ( 14-NB-04 ) through MSIP. J. Jeon and H. Kim acknowledge the support by the Global Frontier R&D Program ( 2013-073298 ) on Center for Hybrid Interface Materials (HIM) funded by the Ministry of Science, ICT & Future Planning .

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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