[11a-Z16-1~9] 4.3 Lasers and laser materials processing

▼ [11a-Z16-5] Enhanced field emission from indium (III) selenide nano-cubes synthesized by laser ablation in liquid

〇(D)Siddhant Anandrao Dhongade¹、Akihiro Furube²、Pankaj Koinkar³、Mahendra More² (1.Doctoral Student、2.professor、3.associate professor)

キーワード：Field emission, Laser ablation in liquid, 2D Materials

The research world for two dimensional (2D) materials is speeding day by day because of their excellent electronic, optical, and optoelectronic properties. Among these 2D materials, indium III selenide (In₂Se₃) is performing excellently in the field of electronics, optics, and optoelectronics. In this work, we synthesized the 70 nm average particle-sized In₂Se₃ nanocubes using laser ablation in water. For laser ablation, Nd: YAG laser is used as the laser source having 532 nm of wavelength with 62 mJ pulse and 10 Hz of repetition rate. The laser with a power of 620 mW was targeted on 1 hour sonicated 20 mg α-In₂Se₃ in 20 ml double distilled
de-ionized water. The α-phase of In₂Se₃ is unchanged even after laser ablation. The In₂Se₃ nanocubes having a size of about 70 nm show the superior field emission behavior. The field electron emission maximum current density ~2.656 mA/cm² at a field of 9.7 V/μm is achieved along with stable emission for 5 hours. We have also studied the electron decay analysis within the cubic structure using ultrafast transient absorption spectroscopy (UTAS) for a better understanding of carrier dynamics.