Evaluation of photoluminescence quantum yield of monolayer WSe2 using reference dye of 3‐borylbithiophene derivative. Issue 2 (13th January 2017)

• Record Type: Journal Article
• Authors: Mohamed, Nur Baizura; Wang, Feijiu; Lim, Hong En; Zhang, Wenjin; Koirala, Sandhaya; Mouri, Shinichiro; Miyauchi, Yuhei; Matsuda, Kazunari
• Is Part Of: Physica status solidi. Volume 254:Issue 2(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-01-13
• Subjects: 3‐borylbithiophene derivative -- dyes -- photoluminescence -- quantum yield -- transition metal dichalcogenides -- WSe2; Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201600563
• Languages: English
• ISSNs: 0370-1972

Abstract

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 (C58 H49 BN2 S4 ) 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.