Electrical control of photoluminescence spectrum of monolayer MoS2

doi:10.3788/gzxb20164507.0730001

CORC > 北京大学 > 信息科学技术学院

	Electrical control of photoluminescence spectrum of monolayer MoS2
	Wang, Ya-Li ; Lin, Zi-Yuan ; Chai, Yang ; Wang, Sheng
刊名	Guangzi Xuebao/Acta Photonica Sinica
	2016
DOI	10.3788/gzxb20164507.0730001
英文摘要	Monolayer molybdenum disulfide (MoS2) with large area and high quality have been grown using Chemical Vapor Deposition (CVD) method. The optical properties of MoS2was characterized systematically and high performance n-type field-effect transistors were fabricated. The effect of applied electrical field on photoluminescence (PL) spectrum of monolayer MoS2in the devices was also studied. The results showed that the strongest emission peak of the PL spectrum of monolayer MoS2consist of two peaks, namely A-peak (Charged Exciton) and A peak (Intrinsic Exciton) at room temperature. The energy difference between the two peaks is about 35 meV. The main PL peak shows obvious redshift and intensity change via tuning the back-gate voltage from negative to positive. We also found that the intensity of these two peaks show opposite dependence on the back-gate voltage with spectrum analysis. These results were analyzed and we concluded that the carrier concentration of monolayer MoS2can be effectively modulated by applied electrical field, which can further affect the intensity and shape of PL spectrum. These results provide significant basis for the research on the physical mechanism of the optical properties of two-dimensional material. Besides, the large-scale preparation of such devices also make it possible to apply these two dimension materials to optoelectronics devices and systems. ? 2016, Science Press. All right reserved.; EI; 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 7; 45
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/494587]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Wang, Ya-Li,Lin, Zi-Yuan,Chai, Yang,et al. Electrical control of photoluminescence spectrum of monolayer MoS2[J]. Guangzi Xuebao/Acta Photonica Sinica,2016.
APA	Wang, Ya-Li,Lin, Zi-Yuan,Chai, Yang,&Wang, Sheng.(2016).Electrical control of photoluminescence spectrum of monolayer MoS2.Guangzi Xuebao/Acta Photonica Sinica.
MLA	Wang, Ya-Li,et al."Electrical control of photoluminescence spectrum of monolayer MoS2".Guangzi Xuebao/Acta Photonica Sinica (2016).