Impact of stoichiometry on the linear and nonlinear optical response of SnOx thin films

6th conference on Advances in Optoelectronics and Micro/nano-optics

Li, Zhong-Guo^1 ; Liang, Ling-Yan^2 ; Cao, Hong-Tao^2 ; Song, Ying-Lin^3

College of Physics and Electronic Engineering, Changshu Institute of Technology, Changshu

215500, China^1

Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo

315201, China^2

Department of Physics, Harbin Institute of Technology, Harbin

150001, China^3

关键词: Device application;    Nonlinear absorptions;    Nonlinear optical response;    Oxygen concentrations;    Pump probe measurement;    Saturable absorption;    Transparent electronics;    UV-vis absorptions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/844/1/012017/pdf
DOI  :  10.1088/1742-6596/844/1/012017

来源: IOP

【 摘 要 】

SnO is a promising p-type oxide semiconductor materials for applications such as transparent electronics and solar cells. However, further improvement of its performance is hindered by its diverse stoichiometry. We investigated the nonlinear and saturable absorption characteristics of pristine SnO and O-rich SnOxfilms by femtosecond degenerate pump-probe measurements at 515 nm. UV-Vis absorption data indicate bandgap blueshift with increasing oxygen concentration. Pristine SnO film exhibit saturable absorption while nonlinear absorption is observed in O-rich SnOxfilms. Our results shed light on the utilization of SnO in future device applications.