Evidence of indirect gap in monolayer WSe2

Monolayer transition metal dichalcogenides have so far been thought to be direct bandgap semiconductors. Here, the authors revisit this assumption and find that unstrained monolayer WSe2 is an indirect-gap material, as evidenced by the observed photoluminescence intensity-energy correlation.

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Bibliographic Details
Main Authors: Wei-Ting Hsu, Li-Syuan Lu, Dean Wang, Jing-Kai Huang, Ming-Yang Li, Tay-Rong Chang, Yi-Chia Chou, Zhen-Yu Juang, Horng-Tay Jeng, Lain-Jong Li, Wen-Hao Chang
Format: article
Language:EN
Published: Nature Portfolio 2017
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Online Access:https://doaj.org/article/296f01bc35924bbdaaf89a2782f6ae99
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