Temperature-dependent photoluminescence and time-resolved photoluminescence study of monolayer molybdenum disulfide

Li，H.1,2; Zhang，X. H.1

2020-09-01

10.1016/j.optmat.2020.110150

OPTICAL MATERIALS   影响因子和分区

0925-3467

1873-1252

We have investigated the static and dynamic photoluminescence (PL) of monolayer molybdenum disulfide (MoS) from low-temperature (4 K) to room temperature (300 K). Free excitons (A excitons) and bound excitons (X excitons) can be seen in the low-temperature PL spectra. The radiative rates and nonradiative rates of the two kinds of excitons as a function of temperature can be calculated through the parameters derived from the PL and time-resolved PL spectra. As the temperature increases, the observed phenomena, including the red-shift of the center wavelength of the PL spectrum, the decrease of the PL intensity, and the shorter of the relaxation time, all can be explained by the temperature-dependence of the band structure of MoS and the temperature-dependence of the nonradiation process. The radiation process originates from excitons recombination in monolayer MoS. The nonradiation process is due to defect trapping and thermal energy generation. The temperature-dependence of the radiation and nonradiation processes significantly affects the optical properties of the monolayer MoS.

Monolayer MoS2 Photoluminescence Temperature-dependence Time-resolved photoluminescence

SCI ; EI

英语

第一 ; 通讯

Natural Science Foundation of Guangdong Province[2014A030313728y] ; Shenzhen Peacock Plan[KQTD2015071710313656]

Materials Science ; Optics

Materials Science, Multidisciplinary ; Optics

WOS:000577080300007

ELSEVIER

20202608881296

Excitons ; Layered semiconductors ; Temperature distribution ; Molybdenum disulfide ; Monolayers ; Red Shift

Thermodynamics:641.1 ; Semiconducting Materials:712.1 ; Light/Optics:741.1 ; Inorganic Compounds:804.2

MATERIALS SCIENCE

2-s2.0-85086897437

Scopus

1.Electronic and Electrical Engineering,South University of Science and Technology,Shenzhen,518055,China
2.Guangdong Institute of Semiconductor Industrial Technology,Guangzhou,510000,China

Li，H.,Zhang，X. H.. Temperature-dependent photoluminescence and time-resolved photoluminescence study of monolayer molybdenum disulfide[J]. OPTICAL MATERIALS,2020,107.

Li，H.,&Zhang，X. H..(2020).Temperature-dependent photoluminescence and time-resolved photoluminescence study of monolayer molybdenum disulfide.OPTICAL MATERIALS,107.

Li，H.,et al."Temperature-dependent photoluminescence and time-resolved photoluminescence study of monolayer molybdenum disulfide".OPTICAL MATERIALS 107(2020).