Optical and Electrical Properties Evolution of Diamond-Like Carbon Thin Films with Deposition Temperature

Abstract

Optical and electrical properties of diamond-like carbon (DLC) films deposited by pulsed laser ablation of graphite target at different substrate temperatures are reported. By varying the deposition temperature from 400 to 25 ∘ C, the film optical transparency and electrical resistivity increase severely. Most importantly, the transparency and resistivity properties of the DLC films can be tailored to approaching diamond by adjusting the deposition temperature, which is critical to many applications. DLC films deposited at low temperatures show excellent optical transmittance and high resistivity. Over the same temperature regime an increase of the 𝑠𝑝 3 bonded C content is observed using visible Raman spectroscopy, which is responsible for the enhanced transparency and resistivity properties.

Preparation and optimization of heterojunction donor(DLC) – acceptor(SI) as a solar cell by DFT and PLD

“…Using Koopman's hypothesis, which depends on the contrasts between the HOMO (highest included subatomic orbital) and LUMO (lowest empty subatomic orbital) energies the unbiased particle. Utilizing a limited contrast guess, the international amounts can be given by [21], which is in excellent agreement with the practical results in terms of better solar cell efficiency(3.54) and increased conductivity when increasing the energy at a thickness of 75 nm [15,23], as in Table 5:…”

“…The thin films of DLC resistivity is majorly based on sp 2 amount. A greater sp 2 cluster causes a reduction in resistivity [21]. With the lowest laser energy (300mJ ), the resistivity value was (3.8×10 6 Ω .cm), and it decreased to about (5.99×10 3 Ω .cm) at 800 mJ.…”

“…We note that the ESP distribution is stable and balanced compared to the electrical properties results because the charge is pulled at two ends of the film, and the ESP structure is pulled towards the positive charge. Also, knowledge of charge distributions can determine how a molecule interacts with the same [14,21]. At the same time, TD is an illustration of the chance of finding an electron in a specific location around an atom or molecule.…”

Monitoring Technological Conditions for Preparing DLC Films in Supersonic Flow of Hydrocarbon Plasma

“…Interference effect is absent at short wavelength because all films are opaque in UV light. Therefore, technological conditions affect on structural transformation of DLC films and they causes changing of ratio I D /I G of sp 3 (diamond-like) and sp 2 (graphite-like) fractions as it was earlier demonstrated in [5]. The structure and bonding in the films was investigated by Raman scattering spectra were measured on a Triplemate SPEX spectrometer with CCD camera and microscope for detection of the backscattering spectra with excitation by 488 nm laser line.…”

Carbon Thin Film on Silicon by Acetylene DC Plasma Deposition System

“…DLC is generally considered as the combination of sp 1 (acetylene-like), sp 2 (graphite-like), and sp 3 (diamond-like) bonding. Difference in sp 3 /sp 2 fraction in the deposited films which strongly dependent upon process conditions, some properties of films can be tailored and produce interesting specific properties which allowable DLC films used in many industries [4]. Among the various methods of plasma generation, DC plasma is consider as a simplest way to construct and offer a low cost deposition system.…”