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Kanik Palodhi

Bio: Kanik Palodhi is an academic researcher from University of Calcutta. The author has contributed to research in topic(s): Convolution & Energy conversion efficiency. The author has an hindex of 3, co-authored 20 publication(s) receiving 26 citation(s).
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Journal ArticleDOI
01 Nov 2021-Optik
Abstract: Recently, perovskite materials opened up a door for the researchers due to their flexibility, photonic conversion efficiency and cost effectiveness. In this work, we study the performances of various active materials categorized as organic, inorganic and organic-inorganic hybrid materials and compare their optical performances to select the efficient material with the help of finite difference time domain analysis (FDTD) and Device solutions provided in Lumerical simulator. We choose conventional active materials like poly(3-hexylthiophene) and [6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PC61BM) as organic active material, cesium lead iodide (CsPbI3) as inorganic active material, and both formamidinium lead iodide (FAPbI3) and methylammonium lead iodide (CH3NH3PbI3 or MAPbI3) as organic-inorganic hybrid active material. Finally, we propose a simple modified thin film perovskite solar cell structure considering previously selected most efficient active material and we achieve maximum photonic conversion efficiency 17.4% having short circuit current density 26.1 mA/cm2 and open circuit voltage 0.78 V with a fill factor of 86%.

Journal ArticleDOI
Abstract: Lower photonic conversion efficiency along with complexity of fabrication are the primary constrains for cost effective thin film solar cell production. In this work, a planar single junction structure of thin film solar cell made with two different active materials is studied, which can take care of the mentioned problems. The active materials were selected based on different parameters like band gap energy, contact potential, lattice mismatch and cost effectiveness. Simulation shows that optical absorption along with photonic conversion efficiency varies due to change in position, thickness and doping concentration of active material and so these parameters are optimized accordingly. Here an interface layer of Gallium Arsenide (GaAs) is added to the thin film Silicon (Si) layer. Our optimized Si-GaAs based thin film solar cell yields a short circuit current density of 27.51 mA/cm2 with conversion efficiency of 13.71% having a fill factor of 0.81 under AM1.5G for a typical thin film solar cell of total thickness 2 µm out of which 80% is crystalline Silicon (1.6 µm thick) and 20% is Gallium arsenide (0.4 µm thick). Thus, a simple structure with improved conversion efficiency is proposed.

Journal ArticleDOI
TL;DR: This process, involving the sequential application of deconvolution and convolution techniques, followed by the application of Artificial Neural Network (ANN), to identify the etch-pit openings in NTDs, gives a higher degree of success compared to other conventional image analysis techniques.
Abstract: A novel image analysis algorithm, applied to the images from Nuclear Track Detectors (NTDs), is presented. This process, involving the sequential application of deconvolution and convolution techniques, followed by the application of Artificial Neural Network (ANN), to identify the etch-pit openings in NTDs, gives a higher degree of success compared to other conventional image analysis techniques.

Journal ArticleDOI
Abstract: Negative differential resistance (NDR) and hysteresis effects have been successfully achieved by synthesizing DNA-immobilized CoFe2O4 magnetic nanoparticles using wet chemical co-precipitation method. These multiple effects in a single compound particle can open the door for several next generation applications from high frequency communication device development to memory storage device. Here, for both positive and negative bias condition during electrical characterization, reproducible NDR peaks have been found. For the sample with maximum DNA conjugation with CoFe2O4 magnetic nanoparticles consistent hysteresis effects have also been found. Both of these features i.e., NDR and hysteresis can be attributed to conformational changes in crystal structure due to addition of DNA and polaron transform phenomena at the molecular level, respectively. By achieving these two features in one material, multifunctional devices can be developed for molecular electronic applications.


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Journal ArticleDOI
Abstract: This paper extensively reviews and analyses Light Fidelity (LiFi), a new technology that uses light to transmit data as a high-speed wireless connection system from a wide spectrum of domains. An in-depth analysis and classifications of pertinent research areas for LiFi networks are presented in this paper. The various aspects constituting this paper include a detailed literature review, proposed classifications, and statistics, which further is deliberated to encompass applications, system architecture, system components, advantages, and disadvantages. LiFi and other technologies are compared, multi-user access techniques used in LiFi networks are investigated and open issues are addressed in detail. The paper is concluded with a comprehensive taxonomy of literature comparison that has served as the basis of the proposed open issues and research trends.

Journal ArticleDOI
01 Nov 2021-Optik
Abstract: Recently, perovskite materials opened up a door for the researchers due to their flexibility, photonic conversion efficiency and cost effectiveness. In this work, we study the performances of various active materials categorized as organic, inorganic and organic-inorganic hybrid materials and compare their optical performances to select the efficient material with the help of finite difference time domain analysis (FDTD) and Device solutions provided in Lumerical simulator. We choose conventional active materials like poly(3-hexylthiophene) and [6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PC61BM) as organic active material, cesium lead iodide (CsPbI3) as inorganic active material, and both formamidinium lead iodide (FAPbI3) and methylammonium lead iodide (CH3NH3PbI3 or MAPbI3) as organic-inorganic hybrid active material. Finally, we propose a simple modified thin film perovskite solar cell structure considering previously selected most efficient active material and we achieve maximum photonic conversion efficiency 17.4% having short circuit current density 26.1 mA/cm2 and open circuit voltage 0.78 V with a fill factor of 86%.

Journal ArticleDOI
Abstract: Lower photonic conversion efficiency along with complexity of fabrication are the primary constrains for cost effective thin film solar cell production. In this work, a planar single junction structure of thin film solar cell made with two different active materials is studied, which can take care of the mentioned problems. The active materials were selected based on different parameters like band gap energy, contact potential, lattice mismatch and cost effectiveness. Simulation shows that optical absorption along with photonic conversion efficiency varies due to change in position, thickness and doping concentration of active material and so these parameters are optimized accordingly. Here an interface layer of Gallium Arsenide (GaAs) is added to the thin film Silicon (Si) layer. Our optimized Si-GaAs based thin film solar cell yields a short circuit current density of 27.51 mA/cm2 with conversion efficiency of 13.71% having a fill factor of 0.81 under AM1.5G for a typical thin film solar cell of total thickness 2 µm out of which 80% is crystalline Silicon (1.6 µm thick) and 20% is Gallium arsenide (0.4 µm thick). Thus, a simple structure with improved conversion efficiency is proposed.

Journal ArticleDOI
Jing Shao1, Honglie Shen1, Kai Gao1, Xiaomin Huo1  +3 moreInstitutions (1)
Abstract: Films with ultraviolet (UV) and near-infrared (NIR) blocking properties can be used to protect against UV and heat radiation, thus prolonging the operating life of photovoltaic devices. Being wide band-gap semiconductors, ZnO films can absorb UV light and antimony doped tin oxide (ATO) films can play the role of defending against the NIR light with low electrical resistivities. In this work, the bilayer films of ZnO overlayed by ATO are sputtered by radio-frequent (r.f.) magnetron sputtering, and the growth rules of ATO on ZnO film are studied comprehensively by adjusting parameters including the sputtering power, pressure, gas flow rate ratio of O2/Ar and sputtering time. Eventually, a bilayer film with 200 nm thick ZnO layer and 400 nm thick ATO layer is fabricated and shows about 96% UV-blocking (from 280 nm to 380 nm), about 66% NIR-blocking (from 1100 nm to 2500 nm) while maintains about 80% light transmittance (from 380 nm to 1100 nm) after annealing in the nitrogen atmosphere at 500 °C for 1 h. This transparent bilayer film with UV and NIR double blocking functions can be potentially used in organic solar cells.

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Related Authors (2)
Semanti Chakraborty

9 papers, 4 citations

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Joydeep Chatterjee

11 papers, 12 citations

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Performance
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Author's H-index: 3

No. of papers from the Author in previous years
YearPapers
20217
20208
20192
20181
20171
20161