Impacts of graphene quantum dots on the optical, electrical and thermal properties of the archetypal conducting polymer PEDOT:PSS

Kong, Minghua1,2; Garriga, Miquel2; Reparaz, Juan Sebastian; Alonso, Maria Isabel1,2

2024-07-01

10.1016/j.rio.2024.100737

RESULTS IN OPTICS   影响因子和分区

2666-9501

We investigated the optical properties and thermal conductivity of blade-coated graphene quantum dots (GQDs)/PEDOT:PSS hybrid thin films by varying the content of GQDs. The optical properties were determined by spectroscopic ellipsometry in the range of 1.2-5.5 eV. Two dispersion models were used to analyze the optical properties of the films: the Bruggeman effective medium approximation (BEMA) for the hybrid films, and the Drude model combined with a Lorentzian oscillator for both the pure and the hybrid films, which provides insight into their electrical properties. As a novel finding, we observed that the optical anisotropy of PEDOT:PSS (Aldrich 483095) films is reduced after incorporating GQDs. Moreover, dedoping of the PEDOT chains is demonstrated upon increasing the content of GQDs within the hybrid films. Furthermore, the thermal conductivity shows a two-fold decrease as the GQDs fraction increases from 0 to 10 wt%. This result is understood considering that the GQDs act as local scattering centers, resulting in a decrease of the thermal conductivity.

Graphene quantum dots PEDOT:PSS Optical anisotropy Thermal conductivity Bruggeman effective medium approximation Drude model

ESCI

英语

第一 ; 通讯

Optics

Optics

WOS:001310366200001

ELSEVIER

Web of Science

1.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
2.ICMAB CSIC, Inst Ciencia Mat Barcelona, Campus UAB, Bellaterra 08193, Spain

Kong, Minghua,Garriga, Miquel,Reparaz, Juan Sebastian,et al. Impacts of graphene quantum dots on the optical, electrical and thermal properties of the archetypal conducting polymer PEDOT:PSS[J]. RESULTS IN OPTICS,2024,16.

Kong, Minghua,Garriga, Miquel,Reparaz, Juan Sebastian,&Alonso, Maria Isabel.(2024).Impacts of graphene quantum dots on the optical, electrical and thermal properties of the archetypal conducting polymer PEDOT:PSS.RESULTS IN OPTICS,16.

Kong, Minghua,et al."Impacts of graphene quantum dots on the optical, electrical and thermal properties of the archetypal conducting polymer PEDOT:PSS".RESULTS IN OPTICS 16(2024).