Preparation and Characterization of Ag2Se-based Ink Used for Inkjet Printing

doi:10.15541/jim20220030

Abstract

Abstract:

Preparation of silver selenide (Ag₂Se) based thin films is significant to the micro devices. However, most of reported methods for preparing Ag₂Se films have not achieved the accuracy control and flexible pattern design of films. Inkjet printing technology is believed to provide a valid approach to solve this problem by which combination Ag₂Se and inkjet printing technology shows high value and importance. In this work, Ag₂Se nanoparticles were synthesized by solvothermal method and then dispensed into different solvents to obtain the ink with high stability. Jetting parameters were further developed to achieve the jetting of Ag₂Se ink and optimize the morphology of droplets. Ag₂Se thin films were prepared on polyimide substrates via inkjet printing with different printing layers. As-printed films were finally annealed to increase the crystalline and density. The phase and surface morphology of Ag₂Se films were characterized and the electrical conductivity of the films was measured by using four-probe measurement. Ag₂Se films can achieve higher density and crystallinity with ink concentration and printing layers increasing, which leads to higher electrical conductivity. Improvement of structure and performance of Ag₂Se films result from the increasing deposition and stacking density of Ag₂Se nanoparticles. The electrical conductivity of inkjet-printed Ag₂Se film can reach as high as 399 S·cm^-1 at the ink concentration of 5 mg·mL^-1 and the number of printing layers of 40, which provides a new orientation to prepare Ag₂Se based films and devices.

Key words: inkjet printing, Ag₂Se, ink, electrical conductivity

CLC Number:

TQ174

ZHANG Keyi, ZHENG Qi, WANG Lianjun, JIANG Wan. Preparation and Characterization of Ag₂Se-based Ink Used for Inkjet Printing[J]. Journal of Inorganic Materials, 2022, 37(10): 1109-1115.

Figures/Tables 10

Fig. 1 XRD patterns of Ag2Se powders

Fig. 2 SEM images of Ag2Se powder (a) Low-resolution; (b) High-resolution

Fig. 3 Dispersion and stability of Ag2Se powders synthesized by solvothermal method in different solvents (a) Optical images of Ag2Se ink after ultrasonic dispersion; (b) 12-h still-standing

Fig. 4 Shape of droplets with different cartridge voltage setting (a, d) 18 V; (b, e) 21 V; (c, f) 26 V

Fig. 5 XRD patterns of Ag2Se films corresponding to different ink concentrations

Fig. 6 SEM images of Ag2Se films printed with different ink concentrations (a-b) 1.25 mg·mL-1; (c-d) 2.5 mg·mL-1; (e-f) 5 mg·mL-1

Fig. 7 XRD patterns of Ag2Se films with different printing layers

Fig. 8 SEM images of Ag2Se films with different printing layers (a-b) 10 layers; (c-d) 20 layers; (e-f) 30 layers; (g-h) 40 layers

Fig. 9 Electrical conductivity of Ag2Se films as a function of printing layers

Fig. 10 Pattern printed through inkjet printing technology

References 29

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Preparation and Characterization of Ag₂Se-based Ink Used for Inkjet Printing

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