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Proceedings Paper

Stacking dependent electro and optical properties in 2D TMD by Raman/PL imaging (Conference Presentation)
Author(s): Ze-Xiang Shen; Jiaxu Yan; Juan Xia; Dongfei Li; Xi Yuan; Xiaofeng Fan; Lili Yang

Paper Abstract

2D TMD and perovskite materials have attracted intensive research interests due to their unique electrooptical properties. Detailed understanding structural information and layer-layer interaction will help greatly in tailoring their properties for applications. We use Raman and PL spectroscopic/imaging techniques to study few-layer 2D TMD samples and perovskites. Our results show that layer-layer coupling and stacking sequence significantly affect spin-orbit coupling in 2D samples. High pressure study and ab initio calculations are used to elucidate the 4000 times PL enhancement in CH3NH3PbBr3. The proposed indirect to direct band gap transition is further confirmed using time resolved PL measurements.

Paper Details

Date Published: 11 November 2016
PDF: 1 pages
Proc. SPIE 9925, Nanoimaging and Nanospectroscopy IV, 99250P (11 November 2016); doi: 10.1117/12.2238860
Show Author Affiliations
Ze-Xiang Shen, Nanyang Technological Univ. (Singapore)
Jiaxu Yan, Nanyang Technological Univ. (Singapore)
Juan Xia, Nanyang Technological Univ. (Singapore)
Dongfei Li, Jilin Normal Univ. (China)
Xi Yuan, Jilin Normal Univ. (China)
Xiaofeng Fan, Jilin Univ. (China)
Lili Yang, Jilin Normal Univ. (China)

Published in SPIE Proceedings Vol. 9925:
Nanoimaging and Nanospectroscopy IV
Prabhat Verma; Alexander Egner, Editor(s)

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