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

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• 作者：Nur Baizura Mohamed ; Feijiu Wang ; Hong En Lim ; Wenjin Zhang ; Sandhaya Koirala ; Shinichiro Mouri ; Yuhei Miyauchi and Kazunari Matsuda
• 刊名：physica status solidi (b)
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：254
• 期：2
• 全文大小：696K
• ISSN：1521-3951

文摘

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.