Substitutional oxygen activated photoluminescence enhancement in monolayer transition metal dichalcogenides
نویسندگان
چکیده
Atomically thin transition metal dichalcogenides (TMDCs) are intriguing semiconductors for photonics and optoelectronics, therefore enhancing their photoluminescence (PL) efficiency is crucial these applications. Many efforts have been contributed to the PL performance of monolayer TMDCs, yet complexity between microstructure has hindered manipulation properties. Here we demonstrate that intensity TMDC can be enhanced by nearly one order magnitude with a ?20% narrower spectral linewidth after pre-activation plateau using laser irradiation in ambient environment. Combined experimental theoretical studies reveal low-power generates many sulfur vacancy clusters, which subsequently filled up oxygen, lattice substitutional oxygen clusters induce dramatic enhancement WS2. Such phenomenon found universal other thus would benefit versatile optical
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ژورنال
عنوان ژورنال: Science China. Materials
سال: 2021
ISSN: ['2095-8226', '2199-4501']
DOI: https://doi.org/10.1007/s40843-021-1832-2