Pulsed Laser Ablation of Tin Oxide Nanoparticles in Liquid for Optoelectronic Devices
- PDF / 2,472,535 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 78 Downloads / 198 Views
ORIGINAL PAPER
Pulsed Laser Ablation of Tin Oxide Nanoparticles in Liquid for Optoelectronic Devices Raid A. Ismail 1
&
Sule Erten-Ela 2 & Abdulrahman K. Ali 1,2 & Cagdas Yavuz 2 & Khaleel I. Hassoon 1
Received: 29 June 2020 / Accepted: 26 August 2020 # Springer Nature B.V. 2020
Abstract Laser ablation of tin oxide (SnO2) nanoparticles (NPs) was carried out by irradiation of tin target in methanol and aqueous NaCl solutions with nanosecond laser pulses. X-ray diffraction (XRD) studies show that the synthesized nanoparticles are polycrystalline tin oxide with tetragonal phase. Scanning electron microscope (SEM) and transmission electron microscope (TEM) were used for characterization of the shape, particle size and particle distribution of tin oxide nanoparticles. SEM results reveal that the synthesized NPs have spherical shape and the presence of agglomerated NPs was observed. TEM investigation confirms that the average particle size of SnO2 synthesized in methanol was 40 nm and in NaCl solution was around 25 nm. The optical energy gap of SnO2 NPs prepared in methanol and NaCl solutions were 3.8 eV and 3.95 eV, respectively. Energy dispersive X-ray (EDX) confirms the formation of SnO2 NPs. The parameters of n-SnO2NPs/p-Si heterojunction photodetectors, namely, dark and illuminated current-voltage characteristics, photovoltaic properties, spectral responsivity and specific detectivity were measured. The responsivity of the photodetector prepared in NaCl solution was 0.53A/W at 410 nm, while the responsivity of photodetector prepared in methanol was 0.43A/W at 410 nm. Keywords Laser ablation . Tin oxide . Nanoparticles . Methanol . NaCl . Photodetector
1 Introduction Tin oxide is non-toxic and inexpensive semiconducting material [1–3]. It considers a promising material for many potential applications due to its high electrical conductivity and its good optical transparency in the visible region [4]. SnO2 is an ntype semiconductor with direct optical energy gap of 3.6 eV at room temperature. Nanostructured SnO2 has paying attention due to its size-depended properties [5]. There are many morphologies for synthesized nanostructured SnO2 such as nanowires, nanoparticles, nanotubes and nanorods [6].SnO2 used widely for electrodes, solar cells, gas sensors, rechargeable lithium batteries, photodetectors, photocatalyst, energy storage, and medicine. Many methods were employed to
* Raid A. Ismail [email protected] 1
Applied Sciences Department, University of Technology, Baghdad, Iraq
2
Institute of Solar Energy, Ege University, 35100 Izmir, Turkey
synthesize SnO2 nanoparticles like spray pyrolysis, hydrothermal, magnetron sputtering, sonochemical, solvothermal, solgel, microwave, co-precipitation, and laser ablation in liquid [7–11]. The particle size distribution and morphology of SnO2 nanoparticles were found to be depended on the preparation technique. Laser ablation in liquid (LAL) technique has confirmed itself as one of the most powerful physical methods used for nanofabrication. The advantages of this te
Data Loading...
