Puvaneswaran Chelvanathan

Puvaneswaran Chelvanathan
Universiti Kebangsaan Malaysia | ukm

About

75
Publications
24,891
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1,291
Citations
Citations since 2016
52 Research Items
1172 Citations
2016201720182019202020212022050100150200250300
2016201720182019202020212022050100150200250300
2016201720182019202020212022050100150200250300
2016201720182019202020212022050100150200250300

Publications

Publications (75)
Article
Full-text available
The silicon heterojunction solar cell (SHJ) is considered the dominant state-of-the-art silicon solar cell technology due to its excellent passivation quality and high efficiency. However, SHJ’s light management performance is limited by its narrow optical absorption in long-wave near-infrared (NIR) due to the front, and back tin-doped indium oxide...
Article
In this letter, the effects of sulphurization time on the material properties of CTS thin film and concomitant device performance were investigated. A specified range of sulphurization time from 1 to 3 hours were carried out. Structural analyses confirmed that polycrystalline CTS were apparent in all samples prepared, with an intermediate secondary...
Article
Full-text available
Despite the increasing trend of n-type silicon wafer utilization in the manufacturing of high-efficiency heterojunction solar cells due to the superior advantages over p-type counterparts, its high manufacturing cost remains to be one of the most crucial factors, which impedes its market share growth with state-of-the-art silicon heterojunction (SH...
Article
CuCl2 solutions of various molarities were used to treat CdSe thin films produced by RF magnetron sputtering. In-depth investigation on the impacts of this treatment on CdSe thin films were studied. The structural investigation revealed that all as-grown films exhibited the hexagonal phase peak at the (101) plane. The crystalline and grain sizes in...
Article
In the last two decades, research on dye-sensitized solar cells (DSSCs) has shown tremendous improvement with promising findings. It has become one of the alternative options in replacing conventional silicon-based photovoltaics. Recently, a study towards the flexible form of solar cells has gained the attention of researchers. The features possess...
Chapter
CZTS quaternary semiconductors are gaining wider attention as a promising photoactive absorber material in thin film photovoltaic (PV) devices due to their optimum band gap of 1.5 eV and high absorption coefficient on the order of 10⁴ cm⁻¹. Besides the excellent PV material properties, CZTS also offers a possible pathway towards low cost and enviro...
Article
Full-text available
Photovoltaics significantly contributes towards the emerging renewable energy drive. Amongst the available thin film solar cell technologies, presently CdTe is leading at commercial state. CdS is being widely used as window layer in CdTe solar cell but challenged with toxicity. Therefore, this project explores the feasibility of CdSe as alternative...
Article
Unambiguously layer by layer (LBL) assembly of graphene quantum dots (GQDs), and dye (GQDs/dye) on TiO2 photoanode is the traditional and straightforward approach in the fabrication of graphene quantum dot-cosensitized solar cells (QDSSCs). Unfortunately, limited light absorption and low affinity of GQDs to TiO2 surface shadow the advantages of LBL...
Article
This work investigated the thermoelectric properties of Cu2ZnSnS4 (CZTS) thin films deposited on the soda-lime glass using spin-coating techniques with different layers. X-ray diffraction (XRD) pattern confirms the increase of the layer number leads to improve the crystallite size and all the films exhibit tetragonal structure with the presence of...
Article
Full-text available
In the current time, transparent and semitransparent solar cells in photovoltaic industry have drawn important attention owing to their potential use as solar windows, and energy harvesting devices for building, vehicle integration and flexible electronics. In this work, a semitransparent thin film heterojunction solar cells device structure of p-C...
Article
The demand for a reliable alternative renewable energy is skyrocketing given the detrimental effect of conventional energy sources on the environment and its rapidly depleting global supply. While Cu2ZnSnS4 (CZTS)-based photovoltaic devices have gained a foothold through enhanced energy conversion efficiency, efforts are still required to further b...
Article
Full-text available
The influence of Molybdenum diselenide (MoSe2) as an interfacial layer between Cu(In,Ga)Se2 (CIGS) absorber layer and Molybdenum (Mo) back contact in a conventional CIGS thin-film solar cell was investigated numerically using SCAPS-1D (a Solar Cell Capacitance Simulator). Using graded bandgap profile of the absorber layer that consist of both back...
Article
Over the last decade, optically transparent antennas have been the focus of study for applications ranging from satellite networking to window embedded telecommunications. In this letter, the feasibility of DC-sputtered GZO thin films as an active material for transparent antenna application is briefly investigated. We commence by showing that the...
Article
The conditions under which thin films are deposited are the most important parameter determining the physical performance of devices. In this work, we present the effect of preheating temperatures under N2 ambient conditions on the quality of Cu2ZnSnS4 (CZTS) thin films. Herein we are interested in the structural, morphological, vibrational, optica...
Preprint
Full-text available
Unambiguously layer by layer (LBL) assembly of graphene quantum dots (GQDs) and dye (GQDs/dye) on TiO 2 photoanode is the traditional and straightforward approach in the fabrication of graphene quantum dot-sensitized solar cells (QDSSCs). Unfortunately, limited light absorption and low affinity of GQDs to TiO 2 surface shadow the advantages of LBL...
Article
Ternary semiconductor Cd x Zn (1−x) S thin films are prepared by chemical bath deposition (CBD) using N-methyl thiourea as an alternative sulfur precursor. Molar concentration of CdSO 4 has been varied from 0.01 M to 0.09 M during the fabrication process of Cd x Zn (1−x) S thin film. Effect of variation in Cd ²⁺ molar concentration on morphological...
Article
Full-text available
To increase energy demand, reliability, and increasing efficiency, thin-film solar cells get the main focus. Various types of solar cell like (Cu(In,Ga)Se2 (CIGS), Cadmium telluride (CdTe) and copper zinc tin sulfide (CZTS) based absorber compound now eliminated by CTS (Cu2SnS3) for different reason like toxicity, shortage and structural complexity...
Article
Full-text available
Cadmium selenide (CdSe) thin films were grown on borosilicate glass substrates using the RF magnetron sputtering method. In this study, CdSe thin film was deposited at a deposition temperature in the range of 25 °C to 400 °C. The influence of deposition or growth temperature on the structural, morphological, and opto-electrical properties of CdSe f...
Article
Full-text available
A CdS thin film buffer layer has been widely used as conventional n-type heterojunction partner both in established and emerging thin film photovoltaic devices. In this study, we perform numerical simulation to elucidate the influence of electrical properties of the CdS buffer layer, essentially in terms of carrier mobility and carrier concentratio...
Article
Full-text available
Recent years have illustrated the significantly pervasive interest in transparent antennas. The number and the popularity of transparent antenna applications have escalated dramatically. Although antenna applications are diverse and available across multiple platforms, some of these antennas are unsuitable for practical usage, particularly in cases...
Article
Full-text available
Intrinsic Zinc Oxide (i-ZnO) is a promising material and has been applied in many types of solar cell structures, and particularly in thin film solar cells (TFSC) where it is normally used as the n-type layer or as normally addressed, the buffer or window layer. In this work, ZnO nanofilm was deposited by radio frequency (RF) sputtering technique a...
Article
Kesterite structure Cu 2 ZnSnS 4 (CZTS) was deposited by RF magnetron sputtering, followed by ionic treatment using 0.25 M of NaF and 0.05 M of SnCl 2 before being sulphurized. The ionic treatment using sodium and tin improved the structural, morphological, optical, and electrical properties of the CZTS thin films. The added Na and Sn before the su...
Article
In this study, preliminary investigation of different post-deposition treatments using materials such as cadmium chloride (CdCl2), magnesium chloride (MgCl2), copper chloride (CuCl2), and silver nitrate (AgNO3) has been reported for close-spaced sublimation (CSS) grown cadmium telluride (CdTe) thin films. The treatment of CdTe thin films was conduc...
Article
Full-text available
In this study, cadmium sulfide (CdS) nanoparticles (NPs) were synthesized via chemical precipitation, a facile and cost effective method. The effects of various cadmium salt concentration on the characteristics of CdS NPs has been analyzed to understand the structure properties relationship for optoelectronics applications. XRD, FESEM, Raman Spectr...
Article
Full-text available
In this paper, Zn1-xMgxS thin films were co-sputtered on glass substrates using ZnS and MgS binary target materials under various applied RF power. The compositional ratio of Zn1-xMgxS films was varied by changing the RF power at an elevated temperature of 200 °C. The structural and optical properties were studied in detail. The structural analysis...
Article
CdS is commonly used as a window layer in solar cell structure and is deposited by different growth techniques. In this study, a source-dependent comparative analysis on chemical bath deposition-grown CdS thin film focusing on different sulphur sources, namely, thiourea (NH2SCNH2) and N-methylthiourea (NH2CSNHCH3), was conducted. Moreover, the effe...
Article
ZnO-nanowire arrays (ZNWAs) prepared via hydrothermal method of ZnO NPs/ITO substrates were used as the support to fabricate PbS/CdS/ZnO NWAs composited by using successive ionic layer adsorption and reaction. After confirmation of the structure by using XRD analysis and optical properties using Uv-vis spectroscopy. Hall-effect and photoelectrochem...
Article
Chemical bath deposition (CBD) method was used to deposit CdS thin films on soda-lime glass substrates by using n-methylthiourea (NTU) as an alternative sulphur source and are compared with typical thiourea (TU) precursor. The sulphur source concentration was varied from 0.01 M to 0.1 M and the impact on the microstructural, surface morphology, opt...
Article
This research article aims to examine the feasibility of several machine learning techniques to forecast the exergetic performance of a building‐integrated photovoltaic‐thermal (BIPVT) collector. In this regard, it uses multiple linear regression, multilayer perceptron, radial basis function regressor, sequential minimal optimization improved suppo...
Article
This work presents the effects of the preheating environment on the microstructural, compositional, optical, and electrical properties of spin-coating-deposited CZTS thin films. CZTS precursors were prepared using a sol-gel method and deposited by spin-coating; they were subsequently preheated at 150 °C under different atmospheres (air, Ar, and N2)...
Article
Full-text available
n this paper, Solar Cell Capacitance Simulator-1D (SCAPS-1D) was used to study the absorber layer defect density and n/i interface of perovskite solar cells versus various cell thickness values. The planar p-i-n structure was defined as PEDOT:PSS/Perovskite/CdS, and its performance was simulated. Power conversion efficiency > 25% can be achieved at...
Article
Full-text available
In this study, nickel oxide (NiO) thin films were deposited on soda lime glass using radio-frequency magnetron sputtering at different growth (substrate) temperatures ranging from room temperature (RT) to 400 °C. The effects of substrate temperature on the structural, morphological, electrical, and optical properties were investigated. The XRD patt...
Article
In this present work, we report a novel fabrication technique of ternary Cu 2 SnS 3 (CTS) thin films by sulphur-ization of sequentially sputtered Sn/CuSn (elemental/alloy) stacked metallic precursors. The focal aim of our investigation is on the impact of metallic precursors' Cu/Sn ratio on the overall material properties of CTS films, which in tur...
Article
The defects at the absorber and interface layer of organic-inorganic lead halide perovskite solar cells are unfavorable for efficiency as well as the stability. In this study, we have performed the numerical simulation on inverted planar structure perovskite solar cell based on NiO as a hole transport material (HTM) by SCAPS-1D. Here we investigate...
Article
Full-text available
In this work, a detailed information about physical properties of Cu2ZnSnS4 stannite phase by first principles calculation has been presented. Using density functional theory based on the generalized gradient approximation GGA, the structural properties such as lattice parameters and bulk modulus has been determined. In addition, structure electron...
Conference Paper
Semiconducting molybdenum disulphide (MoS2) is one of the most important two-dimensional (2D) layered transition metal dichalcogenides (TMDCs), which overcomes the zero bandgap shortcoming of graphene and widens its applications in the fields of nanoscale electronics and optoelectronic devices. • MoS2 thin films have been reported to exhibit both p...
Article
Full-text available
Cu2 SnS3 (CTS) thin films were fabricated by two-step process: deposition of precursor by RF magnetron sputtering, and subsequent sulfurization at different temperatures. The influence of sulfurization temperatures on the structural, morphological, optical, and electrical properties was investigated to find out the optimum growth route for CTS form...
Article
Gallium-doped zinc oxide (GZO) is a potential transparent conductive oxide material suitable for modern photovoltaics among other applications. In this study, GZO thin films were deposited by a confocal direct current sputtering system to investigate effects of various deposition parameters such as power (60 and 100 W), substrate temperature (50, 1...
Article
In this study we present a ternary alloy, Cd1−xZnx S as an electron transport layer for a planar lead halide perovskite solar cell via numerical simulation with solar cell capacitance simulator (SCAPS) software. Performance dependence on molar composition variation in the Cd1−xZnx S alloy was studied for the mixed perovskite CH3NH3PbI3−xClx absorbe...
Article
In this letter, we report the structural and optoelectronic properties of chromium-doped Cu2ZnSnS4 (CZTS:Cr) deposited by co-sputtering technique. Addition of chromium was observed to deteriorate the Cu2ZnSnS4 crystallinity as well as inducing the growth of cubic-ZnCr2S4 secondary phase. Grain size as large as 0.5 mm was observed for the doped samp...
Article
Cu⁠2ZnSnS⁠4 (CZTS) is highly researched photovoltaic (PV) material in recent years because of resource availability and non-toxicity of its constituents. Radio frequency (RF) magnetron sputtering is one of the potential methods of fabricating CZTS thin film due to its suitability for large scale industrial implementation. Of the three methods of de...
Article
A novel and low cost vapor phase epitaxy (VPE) method using a single non-volatile source has been used to deposit ZnS thin films on soda lime glass substrates. Utilization of the non-volatile source eliminates the need for expensive and sophisticated reactors commonly used in conventional VPE. Instead, this experiment was carried out using inexpens...
Article
In this letter, we report the effects of preferred crystallographic orientation of Mo films on the formation of MoS2 layer through elemental sulphurization process. Vacuum thermal annealing of as-sputtered Mo films results in noticeable change in preferred crystallographic orientation from (1 1 0) to (2 1 1) plane. Correlation between structural an...
Chapter
The ever-increasing global energy needs due to continual population growth, imminent depletion of fossil fuels, as well as mitigating environmental pollutions around the globe have compelled mankind to search for alternatives in recent years. Among many known alternatives, solar photovoltaic (PV) technology has undoubtedly proven itself worth as on...
Article
A relative performance assessment of copper tin sulfide (CTS) thin film solar cells with different phases such as, cubic, tetragonal, and orthorhombic as an absorber layer has been carried out by AMPS-1D simulation software. Based on the proposed device architecture, the effects of thickness and carrier concentration for the absorber layer as well...
Article
This paper elucidates the properties of MoOx nanobelts grown by air annealing that is executed on DC-sputtered Mo bi-layers. Molybdenum thin films were deposited by DC Magnetron sputtering with DC power of 100 W at room temperature. First layer was sputtered at higher pressure to promote adhesion meanwhile second layer was sputtered at lower pressu...
Poster
Full-text available
This study investigates the influence of different growth temperatures on the structural, morphological and electrical properties of CdTe thin films deposited by Close-Spaced Sublimation (CSS) technique. Deposition rates were varied for different source/bottom and substrate/top temperatures such as (B: 625ºC & T: 595ºC), (B: 625ºC & T: 615ºC), (B: 6...
Conference Paper
Full-text available
Thin films of ZnO were deposited on cleaned soda lime glass substrates by using RF magnetron sputtering technique for deposition time of 20mins, 40mins, 60mins, 80mins and 100mins at room temperature. The structural and electrical properties of ZnO thin films were obtained from X-ray diffraction (XRD), Atomic force microscopy (AFM) and Hall Effect...
Article
Full-text available
Metal-semiconductor (MS) junction between Mo and CdTe, which is one of the fundamental issues for CdTe based solar cell, has been investigated for films deposited on different substrates. XRD pattern of Mo/CdTe films on the polyimide (PI) substrate shows a strong preferential orientation of MoTe2 in (100) at 2 = 29.44°, which becomes less apparent...
Article
Many high efficiency thin-film solar cells incorporate a thin layer of CdS in the device structure to form a heterojunction. Chemical bath deposition (CBD) is the most preferred method of deposition especially for large area thin film solar cells. This study explored the effects of ammonium sulfate on the CdS film produced by CBD using cadmium sulf...
Article
In this study, the effects of sulfurization temperature on the properties of thermally evaporated Cu2ZnSnS4 (CZTS) thin films were investigated. Molybdenum (Mo) coated soda lime glass (SLG) was used as substrates and stoichiometric CZTS powder (99.95-) was used as the source material. XRD patterns showed that CZTS were formed with preferential orie...
Conference Paper
Full-text available
In this study the influence of laser annealing on the structural, morphological and optical properties of thermally evaporated CdTe thin films has been investigated. CdTe thin films were deposited by thermal evaporation technique at different power. Thermally evaporated CdTe thin films were then subjected to post deposition laser annealing. The eff...
Conference Paper
Full-text available
To condense the cost and increase the production, using abundantly obtainable non-toxic elements, Cu2ZnSnS4 (CZTS) seem to be a strong contender among the photovoltaic thin film technologies. Cu2ZnSnS4 thin films were fabricated by RF magnetron sputtering system. CZTS were sputtered on Molybdenum (Mo) coated soda lime glass (SLG) using a single tar...
Article
Full-text available
Cu2ZnSnS4 (CZTS) thin films were deposited on top of Molybdenum (Mo) coated soda lime glass (SLG) substrates using a single target RF magnetron sputtering technique.The sputtering parameters such as base pressure, working pressure, RF power, argon (Ar) gas flowrate, and deposition time were kept consistent throughout the experiment.The effect of di...
Article
Full-text available
Molybdenum (Mo) is the prominent choice as the back contact for various thin film solar cells such as CIGS, CZTS and CdTe. Physical vapour deposition (PVD) technique especially sputtering process has been chosen as the foremost method to deposit Mo thin film on top of desired substrate due to ease of parametric control of growth conditions. In this...
Article
Full-text available
CdS thin films were deposited by three different processes; close spaced vapour transport (CSVT), chemical bath deposition (CBD), and sputtering technique on ITO coated glasses and their structural and optical properties were investigated through XRD, SEM, EDX and UV-Vis spectrometry, respectively. The as-grown films are annealed at 400°C and 500°C...
Article
Full-text available
ZnxCd1-xS thin films at low zinc content have been deposited on bare soda lime glass substrates using RF magnetron co-sputtering of CdS and ZnS for the first time to investigate annealing effect on the structural and optical properties of the thin films. The as-deposited films were annealed in O2/N2 ambient at annealing temperature ranging 200-500...