Effects of electrolyte gating on photoluminescence spectra of large-area WSe2monolayer films

Keiichiro Matsuki, Jiang Pu, Daichi Kozawa, Kazunari Matsuda, Lain-Jong Li, Taishi Takenobu

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Abstract

We fabricated electric double-layer transistors comprising large-area WSe2 monolayers and investigated the effects of electrolyte gating on their photoluminescence (PL) spectra. Using the efficient gating effects of electric double layers, we succeeded in the application of a large electric field (>107Vcm%1) and the accumulation of high carrier density (>1013cm%2). As a result, we observed PL spectra based on both positively and negatively charged excitons and their gate-voltage-dependent redshifts, suggesting the effects of both an electric field and charge accumulation. © 2016 The Japan Society of Applied Physics.
Original languageEnglish (US)
Pages (from-to)06GB02
JournalJapanese Journal of Applied Physics
Volume55
Issue number6S1
DOIs
StatePublished - May 24 2016

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