Evaluation of photoluminescence quantum yield of monolayer WSe2 using reference dye of 3-borylbithiophene derivative

Nur Baizura Mohamed, Feijiu Wang, Hong En Lim, Wenjin Zhang, Sandhaya Koirala, Shinichiro Mouri, Yuhei Miyauchi, Kazunari Matsuda

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18 Scopus citations

Abstract

We studied an evaluation method of photoluminescence (PL) quantum yield of monolayer transition metal chalcogenides (TMDs) on a transparent substrate using a reference dye. A 3-borylbithiophene derivative (C58H49BN2S4) reference dye shows a high PL quantum yield of 36% even in the solid form and the high quantum yield is kept in a Poly(methyl methacrylate) (PMMA) matrix. Moreover, the photon energy of PL is similar to those of monolayer TMDs. These PL characteristics of the reference dye are useful for a evaluation of PL quantum yield in monolayer TMDs. The PL quantum yield of 0.18 ± 0.03% was evaluated for mechanically exfoliated monolayer WSe2 on glass substrate at room temperature.

Original languageEnglish (US)
Article number1600563
JournalPhysica Status Solidi (B) Basic Research
Volume254
Issue number2
DOIs
StatePublished - Feb 1 2017

Bibliographical note

Funding Information:
This work was supported by JSPS KAKENHI Grant Numbers JP22740195, JP25400324, JP25610074, JP16H06331, JP26107522, JP15K13500, JP25246010, JP16H00910, JP16H00911, JP15K13337, JP15H05408, by the Asahi Glass Foundation and Murata Science Foundation. The authors thank A. Wakamiya and Y. Murata for experimental equipment.

Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

  • 3-borylbithiophene derivative
  • WSe
  • dyes
  • photoluminescence
  • quantum yield
  • transition metal dichalcogenides

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