Dr . Saravanan Somasundaram - Profile on Academia.edu (original) (raw)
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Papers by Dr . Saravanan Somasundaram
Synthesis and characterization of nanophase zinc oxide materials
N2O Plasma Treatment for Minimization of Background Plating in Silicon Solar Cells with Ni-Cu Front Sidd Metallization
Study of Nickel Silicide Formation and Associated Fill-Factor Loss Analysis for Silicon Solar Cells With Plated Ni-Cu Based Metallization
Impact of Surface Texturization on Overall Performance of Mono Crystalline Silicon Solar Cells
POCl3 Diffusion Process Optimisation for the Emitter in the Crystalline Silicon Solar Cells
Effect of Gas Flow Rates in Optimizing Silicon Nitride Films for Large Area Multicrystalline Silicon Solar Cells
Silicon nitride (SiNx:H) film is a promising material for antireflection coatings and for surface... more Silicon nitride (SiNx:H) film is a promising material for antireflection coatings and for surface passivation in the conventional crystalline silicon (c-Si) solar cell process. In this work, SiNx:H antireflective coating films were successfully fabricated by using conventional batch-type plasma-enhanced chemical vapour deposition system. Film thickness and refractive index (RI) of the samples were evaluated as functions of growth parameters, such as growth pressure, total gas flow rate, radio frequency power and NH3 to SiH4 gas ratio. In this work, an attempt has been made to elucidate the variation of electrical parameters of the multicrystalline silicon solar cells with respect to the gas flow rates and RI. The gas flow rate ratio, , was varied in the range of 0.09 to 0.12 by maintaining the total flow rate of the process gases at 7600 sccm. The variation of RI from 2.03 to 2.18 and the electrical parameters of the solar cells with respect to the gas flow ratio were interpreted and incorporated. Also the variation of efficiency correlated with the flow rate of SiH4 during the deposition of silicon nitride process.
Six Sigma-based approach to optimise the diffusion process of crystalline silicon solar cell manufacturing
Silicon-based photovoltaics (PV) plays the dominant role in the history of PV due to the continuo... more Silicon-based photovoltaics (PV) plays the dominant role in the history of PV due to the continuous process and technology improvement in silicon solar cells and its manufacturing flow. In general, silicon solar cell process uses either p-type- or n-type-doped silicon as the starting material. Currently, most of the PV industries use p-type, boron-doped silicon wafer as the starting material. In this work too, the boron-doped wafers were considered as the starting material to create pn junction and phosphorus was used as n-type doping material. Industries use either phosphorous oxy chloride (POCl3) or ortho phosphoric acid (H3PO4) as the precursor for doping phosphorous. While the industries use POCl3 as the precursor, the throughput is lesser than that of the industries’ use of H3PO4 due to the manufacturing limitations of the POCl3-based equipments. Hence, in order to achieve the operational excellence in POCl3-based equipments, business strategies such as the Six Sigma methodology have to be adapted. This paper describes the application of Six Sigma Define–Measure–Analyze–Improve–Control methodology for throughput improvement of the phosphorus doping process. The optimised recipe has been implemented in the production and it is running successfully. As a result of this project, an effective gain of 0.9 MW was reported per annum.
Pre-metallization processes for c-Si solar cells
Optimization of Cell to Module Conversion Loss by Reducing the Resistive Losses
Studies on Crystalline PV Modules Life Time by interpreting the Acceleration Test Data with Statistical Reliability Models (In Chinese)
Effect of oxygen ambient during phosphorous diffusion on silicon solar cell
Efficiency Improvement on the Multicrystalline Silicon Wafer through Six Sigma Methodology
Crystalline silicon solar cell technology continues to be dominant in the photovoltaic (PV) techn... more Crystalline silicon solar cell technology continues to be dominant in the photovoltaic (PV) technology due to its novel process flow and the clear understanding of the material. Being a mature material-based technology; on the one hand, it has quite a few opportunities for improvement, on the other hand, the expansion of solar energy should depend on this technology. Due to increase in the global energy consumption and high competition level in the market, it has become necessary to show significant improvement in the performance of the present process/product. The demand for high efficiency solar cells at low costs with shorter cycle times forced the manufacturing industries to improve their processes by applying systematic methodologies such as Six Sigma. This paper illustrates the importance of anti-reflective coatings (ARCs) on the silicon solar cell processes and the successful implementation of Six Sigma to improve the efficiency of the silicon solar cells. The different phases of the Six Sigma DMAIC approach applied to the process and the results are interpreted.
Effect of Oxygen Ambient During POCl3 Diffusion on the Performance of Silicon Solar Cells
Studies on the Influence of Effective Carrier Lifetime in the Performance of Industrial Silicon Solar Cells
Minority carrier lifetime plays a significant role in the performance of silicon (Si) solar cells... more Minority carrier lifetime plays a significant role in the performance of silicon (Si) solar cells, due to its importance in qualifying the bare silicon wafers. In order to fabricate the high efficiency industrial Si solar cells, high life time based silicon wafers are a prerequisite which strongly depends on the defects and trap concentrations of the wafer. In the present work, a systematic study of the variation in the minority effective carrier lifetime on Si solar cells has been studied. The solar grade mono silicon wafers used for this study had bulk carrier life time <; 10 μ secs with bulk resistivity of 0.5-3 Ω cm. The silicon solar cells were fabricated in the production line by employing the conventional silicon solar cell process. As expected it has been observed that a change of effective life time in bare wafers improved the cell performance. This paper narrates the electrical performance of the mono crystalline silicon solar cells with respect to the different effective carrier life time of the bare wafers. The results are compared and correlated with the passivation process and have been explained with respect to the different effective carrier life time.
Studies on Crystalline PV Modules Life Time by interpreting the Acceleration Test Data with Statistical Reliability Models
On the dielectric dispersion and absorption in nanosized manganese zinc mixed ferrites
Evidence for polaron conduction in nanostructured manganese ferrite
Synthesis and characterization of Y3Al5O12 and ZrO2 - Y2O3 Thermal Barrier coatings by Combustion Spray Pyrolysis
Studies on the optical band gap and cluster size of the polyaniline thin films irradiated with swift heavy Si ions
Structural and Electrical Studies on Tetrameric Cobalt Phthalocyanine and Polyaniline Composites
Synthesis and characterization of nanophase zinc oxide materials
N2O Plasma Treatment for Minimization of Background Plating in Silicon Solar Cells with Ni-Cu Front Sidd Metallization
Study of Nickel Silicide Formation and Associated Fill-Factor Loss Analysis for Silicon Solar Cells With Plated Ni-Cu Based Metallization
Impact of Surface Texturization on Overall Performance of Mono Crystalline Silicon Solar Cells
POCl3 Diffusion Process Optimisation for the Emitter in the Crystalline Silicon Solar Cells
Effect of Gas Flow Rates in Optimizing Silicon Nitride Films for Large Area Multicrystalline Silicon Solar Cells
Silicon nitride (SiNx:H) film is a promising material for antireflection coatings and for surface... more Silicon nitride (SiNx:H) film is a promising material for antireflection coatings and for surface passivation in the conventional crystalline silicon (c-Si) solar cell process. In this work, SiNx:H antireflective coating films were successfully fabricated by using conventional batch-type plasma-enhanced chemical vapour deposition system. Film thickness and refractive index (RI) of the samples were evaluated as functions of growth parameters, such as growth pressure, total gas flow rate, radio frequency power and NH3 to SiH4 gas ratio. In this work, an attempt has been made to elucidate the variation of electrical parameters of the multicrystalline silicon solar cells with respect to the gas flow rates and RI. The gas flow rate ratio, , was varied in the range of 0.09 to 0.12 by maintaining the total flow rate of the process gases at 7600 sccm. The variation of RI from 2.03 to 2.18 and the electrical parameters of the solar cells with respect to the gas flow ratio were interpreted and incorporated. Also the variation of efficiency correlated with the flow rate of SiH4 during the deposition of silicon nitride process.
Six Sigma-based approach to optimise the diffusion process of crystalline silicon solar cell manufacturing
Silicon-based photovoltaics (PV) plays the dominant role in the history of PV due to the continuo... more Silicon-based photovoltaics (PV) plays the dominant role in the history of PV due to the continuous process and technology improvement in silicon solar cells and its manufacturing flow. In general, silicon solar cell process uses either p-type- or n-type-doped silicon as the starting material. Currently, most of the PV industries use p-type, boron-doped silicon wafer as the starting material. In this work too, the boron-doped wafers were considered as the starting material to create pn junction and phosphorus was used as n-type doping material. Industries use either phosphorous oxy chloride (POCl3) or ortho phosphoric acid (H3PO4) as the precursor for doping phosphorous. While the industries use POCl3 as the precursor, the throughput is lesser than that of the industries’ use of H3PO4 due to the manufacturing limitations of the POCl3-based equipments. Hence, in order to achieve the operational excellence in POCl3-based equipments, business strategies such as the Six Sigma methodology have to be adapted. This paper describes the application of Six Sigma Define–Measure–Analyze–Improve–Control methodology for throughput improvement of the phosphorus doping process. The optimised recipe has been implemented in the production and it is running successfully. As a result of this project, an effective gain of 0.9 MW was reported per annum.
Pre-metallization processes for c-Si solar cells
Optimization of Cell to Module Conversion Loss by Reducing the Resistive Losses
Studies on Crystalline PV Modules Life Time by interpreting the Acceleration Test Data with Statistical Reliability Models (In Chinese)
Effect of oxygen ambient during phosphorous diffusion on silicon solar cell
Efficiency Improvement on the Multicrystalline Silicon Wafer through Six Sigma Methodology
Crystalline silicon solar cell technology continues to be dominant in the photovoltaic (PV) techn... more Crystalline silicon solar cell technology continues to be dominant in the photovoltaic (PV) technology due to its novel process flow and the clear understanding of the material. Being a mature material-based technology; on the one hand, it has quite a few opportunities for improvement, on the other hand, the expansion of solar energy should depend on this technology. Due to increase in the global energy consumption and high competition level in the market, it has become necessary to show significant improvement in the performance of the present process/product. The demand for high efficiency solar cells at low costs with shorter cycle times forced the manufacturing industries to improve their processes by applying systematic methodologies such as Six Sigma. This paper illustrates the importance of anti-reflective coatings (ARCs) on the silicon solar cell processes and the successful implementation of Six Sigma to improve the efficiency of the silicon solar cells. The different phases of the Six Sigma DMAIC approach applied to the process and the results are interpreted.
Effect of Oxygen Ambient During POCl3 Diffusion on the Performance of Silicon Solar Cells
Studies on the Influence of Effective Carrier Lifetime in the Performance of Industrial Silicon Solar Cells
Minority carrier lifetime plays a significant role in the performance of silicon (Si) solar cells... more Minority carrier lifetime plays a significant role in the performance of silicon (Si) solar cells, due to its importance in qualifying the bare silicon wafers. In order to fabricate the high efficiency industrial Si solar cells, high life time based silicon wafers are a prerequisite which strongly depends on the defects and trap concentrations of the wafer. In the present work, a systematic study of the variation in the minority effective carrier lifetime on Si solar cells has been studied. The solar grade mono silicon wafers used for this study had bulk carrier life time <; 10 μ secs with bulk resistivity of 0.5-3 Ω cm. The silicon solar cells were fabricated in the production line by employing the conventional silicon solar cell process. As expected it has been observed that a change of effective life time in bare wafers improved the cell performance. This paper narrates the electrical performance of the mono crystalline silicon solar cells with respect to the different effective carrier life time of the bare wafers. The results are compared and correlated with the passivation process and have been explained with respect to the different effective carrier life time.
Studies on Crystalline PV Modules Life Time by interpreting the Acceleration Test Data with Statistical Reliability Models
On the dielectric dispersion and absorption in nanosized manganese zinc mixed ferrites
Evidence for polaron conduction in nanostructured manganese ferrite
Synthesis and characterization of Y3Al5O12 and ZrO2 - Y2O3 Thermal Barrier coatings by Combustion Spray Pyrolysis
Studies on the optical band gap and cluster size of the polyaniline thin films irradiated with swift heavy Si ions
Structural and Electrical Studies on Tetrameric Cobalt Phthalocyanine and Polyaniline Composites
Manufacturing the Solar Future: The 2013 Production Annual, 2013
Investigations on pristine and swift heavy ion irradiated plasma polymerized aniline thin films
Polymer Thin Films, 2010
Development of Baseline Fabrication Process for Large Area Silicon Solar Cells and Associated Novel Structures
Low Temperature Oxidation for emitter surface passivation in crystalline silicon solar cells
Investigation of carrier lifetime improvements with SiO2/SiNx stacking layer during c-Si solar cell fabrication
Studies on the Effect of Texture Additive in Silicon Solar Cells
Imaging of carrier life time variation during c-Si solar cell fabrication
Impact of Surface Characterisation on Overall Performance of Mono Crystalline Silicon Solar Cells
New-fangled Platform for Sizing the Building Integrated Photovoltaics
Impact of N2O Plasma Pretreatment Prior to Silicon Nitride Deposition on Silicon Solar Cells with Ni-Cu Based Front Metallization
POCl3 diffusion process optimization for the formation of emitters in the crystalline silicon solar cells
Effect of HF and HCl Mixture on the Electrical Performance of the Multicrystalline Silicon Solar Cells
Texturization of mc-Si in a HF-HNO3 System and Effect of HF Concentration on Surface Morphology and Solar Cells Performance
Studies on the Effect of Gas Flow Rates in Optimizing Silicon Nitride Films for Multicrystalline Silicon Solar Cells
Studies on the effect of different POCl3 flow rates in carrier life time & electrical parameters of the silicon solar cells
Effect of High Aspect Ratio in Multi Crystalline Silicon Solar Cells through Screen Design Optimization
Studies on the effect of Nano Silver based Conductive Front Contact Paste for Crystalline Silicon Solar Cells
Evaluation of Carrier Life Time & the Electrical Parameters of the Multicrystalline Silicon Solar Cells Fabricated by using Different POCl3 Flow rates
Electrical Studies on the Mono Crystalline Silicon Solar Cells Fabricated with out Saw Damage Etching in Alkali Etching
Efficiency Improvement of Crystalline Silicon Solar Cells through PECVD and Metallization
Calibration of Secondary Ion Mass Spectrometry of RF-sputtered Indium Nitride Thin films with elastic recoil detection Analysis
Y3Al5O12 and Y2O3 - 8 mol% ZrO2 Coatings by Combustion Spray Pyrolysis
Process overview on Crystalline Silicon Solar Cell Fabrication
Overview on Crystalline Silicon Solar Cell Process Technology
Process and Production Technology of Crystalline Silicon Solar Cells
Crystalline Silicon Solar Cells: Overview and Process flow
Technology and Manufacturing of Crystalline Silicon Solar Cells
Fabrication of Crystalline Silicon Solar Cells and its Challenges
Cutting-edge Process Improvements towards the High Efficiency Crystalline Silicon Solar Cells
Role of Nanotechnology in the Conventional Crystalline Silicon Solar Cell Processes
Fabrication of High Efficiency Silicon Solar Cells – Challenges and Mitigation
Improving the industrial silicon solar cell performance through optimized fabrication process and by using the advanced materials
Silicon Photovoltaics - Past, Present and the Future
Technology and Manufacturing of High Efficiency Silicon Solar Cells
A Preview on Silicon Solar Cells
Photovoltaics - Past, Present and the Future
Photovoltaics - Where are we now?
Conducting Polymer and Ceramic Thin Films - Synthesis and Characterization
Plasma Polymerized Thin Films
Plasma Polymerization - A Review
