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Evaluation of photoluminescence quantum yield of monolayer WSe 2 using reference dye of 3‐borylbithiophene derivative
Author(s) -
Mohamed Nur Baizura,
Wang Feijiu,
Lim Hong En,
Zhang Wenjin,
Koirala Sandhaya,
Mouri Shinichiro,
Miyauchi Yuhei,
Matsuda Kazunari
Publication year - 2017
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201600563
Subject(s) - monolayer , quantum yield , photoluminescence , yield (engineering) , materials science , substrate (aquarium) , derivative (finance) , analytical chemistry (journal) , optoelectronics , nanotechnology , chemistry , optics , physics , fluorescence , organic chemistry , composite material , oceanography , geology , financial economics , economics
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 (C 58 H 49 BN 2 S 4 ) 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 WSe 2 on glass substrate at room temperature.
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