Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300544
H. Esmaielpour, D. Suchet, L. Lombez, A. Delamarre, S. Boyer-Richard, A. Beck, A. Le Corre, O. Durand, J. Guillemoles
Determination of Seebeck coefficient is a practical technique to investigate the direct conversion of hot carrier energy to electric voltage. However, this study is challenging, especially in nanostructured materials using traditional measurements via heaters and electric contacts. Here, we investigate photo-induced Seebeck effects of InGaAs multi-quantum-well structure via a contact-less measurement (photoluminescence spectroscopy). We have determined thermodynamic properties of hot carriers via fitting the emitted photoluminescence spectra with the generalized Planck's law. We have observed a linear dependence between the gradient of carrier temperature and the quasi-Fermi level splitting of photo-generated hot carriers at various lattice temperatures, which is associated with thermoelectric effects in the system.
{"title":"Determination of photo-induced Seebeck coefficient for hot carrier solar cell applications","authors":"H. Esmaielpour, D. Suchet, L. Lombez, A. Delamarre, S. Boyer-Richard, A. Beck, A. Le Corre, O. Durand, J. Guillemoles","doi":"10.1109/PVSC45281.2020.9300544","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300544","url":null,"abstract":"Determination of Seebeck coefficient is a practical technique to investigate the direct conversion of hot carrier energy to electric voltage. However, this study is challenging, especially in nanostructured materials using traditional measurements via heaters and electric contacts. Here, we investigate photo-induced Seebeck effects of InGaAs multi-quantum-well structure via a contact-less measurement (photoluminescence spectroscopy). We have determined thermodynamic properties of hot carriers via fitting the emitted photoluminescence spectra with the generalized Planck's law. We have observed a linear dependence between the gradient of carrier temperature and the quasi-Fermi level splitting of photo-generated hot carriers at various lattice temperatures, which is associated with thermoelectric effects in the system.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76248041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300732
Julia R. D’Rozario, S. Polly, G. Nelson, P. Mohseni, D. Wilt, R. Tatavarti, S. Hubbard
In this work, textured back surface reflectors (BSR) produced by inverse progression metal-assisted chemical etching (I-MacEtch) is used to render wavelength-specific (WS) light trapping structures for thin GaAs solar cells. The HAZE reflectance measured on the MacEtch BSR shows 80% HAZE in the GaAs absorbing region indicative of high diffused photon scattering. The MacEtch BSR was implemented in a 500 nm thick GaAs solar cell, and the external quantum efficiency shows a 17% enhancement in the photogenerated carrier collection from the base of the solar cell when compared to the flat BSR device. The Fabry-Pérot EQE fringes show a photon lifetime enhancement factor of 5.7 in the MacEtch BSR device, especially evident near the GaAs band edge. The recovered photoabsorption provides evidence that the WS BSR can be implemented into a dual-junction InGaP/GaAs solar cell to provide high current output in a radiation-tolerant thinned GaAs subcell.
在这项工作中，通过逆进金属辅助化学蚀刻(I-MacEtch)生产的纹理背表面反射器(BSR)被用于渲染薄砷化镓太阳能电池的波长特异性(WS)光捕获结构。在MacEtch BSR上测量的HAZE反射率显示，在GaAs吸收区有80%的HAZE，表明高扩散光子散射。MacEtch BSR在500 nm厚的砷化镓太阳能电池中实现，与平面BSR器件相比，太阳能电池底部的光生载流子收集的外部量子效率提高了17%。在MacEtch BSR器件中，fabry - p EQE条纹显示出5.7的光子寿命增强因子，特别是在GaAs带边缘附近。回收的光吸收证明了WS BSR可以实现在双结InGaP/GaAs太阳能电池中，在耐辐射的薄化GaAs亚电池中提供高电流输出。
{"title":"Back Surface Reflectors for Thin III-V Multi-junction Space Photovoltaics","authors":"Julia R. D’Rozario, S. Polly, G. Nelson, P. Mohseni, D. Wilt, R. Tatavarti, S. Hubbard","doi":"10.1109/PVSC45281.2020.9300732","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300732","url":null,"abstract":"In this work, textured back surface reflectors (BSR) produced by inverse progression metal-assisted chemical etching (I-MacEtch) is used to render wavelength-specific (WS) light trapping structures for thin GaAs solar cells. The HAZE reflectance measured on the MacEtch BSR shows 80% HAZE in the GaAs absorbing region indicative of high diffused photon scattering. The MacEtch BSR was implemented in a 500 nm thick GaAs solar cell, and the external quantum efficiency shows a 17% enhancement in the photogenerated carrier collection from the base of the solar cell when compared to the flat BSR device. The Fabry-Pérot EQE fringes show a photon lifetime enhancement factor of 5.7 in the MacEtch BSR device, especially evident near the GaAs band edge. The recovered photoabsorption provides evidence that the WS BSR can be implemented into a dual-junction InGaP/GaAs solar cell to provide high current output in a radiation-tolerant thinned GaAs subcell.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75670976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300561
Luis Blanco, E. Klimm, K. Weiß
Solar glass surface degradation caused by environmental factors (such as high temperatures, high UV irradiation, humidity etc.) is a phenomenon that affects the performance of photovoltaic modules. Several different solar glass samples with different anti-soiling coatings exposed to indoor and outdoor degradation, were measured with Atomic Force Microscopy (AFM) to obtain high-resolution information of signal phase shift. This study aims to analyze the phase shift set of data given by the Atomic Force Microscopy to understand if there is a correlation with the degradation effects on the surface of solar glasses caused by environmental factors and to define a methodology for phase shift data analysis processing. Three different methodologies were established. Degradation patterns and changes in the distributions of the data across the different samples are noticeable in all of the methodologies and although the methodologies are not able to represent the complexity of the phase shift data in its entirety, they are able to show changes on phase in different glass surfaces and show the potential of phase shift data analysis.
{"title":"Degradation Analysis of Anti-Soiling Coatings in Solar Glass with AFM Phase shift data The use of Data Analytical Methods","authors":"Luis Blanco, E. Klimm, K. Weiß","doi":"10.1109/PVSC45281.2020.9300561","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300561","url":null,"abstract":"Solar glass surface degradation caused by environmental factors (such as high temperatures, high UV irradiation, humidity etc.) is a phenomenon that affects the performance of photovoltaic modules. Several different solar glass samples with different anti-soiling coatings exposed to indoor and outdoor degradation, were measured with Atomic Force Microscopy (AFM) to obtain high-resolution information of signal phase shift. This study aims to analyze the phase shift set of data given by the Atomic Force Microscopy to understand if there is a correlation with the degradation effects on the surface of solar glasses caused by environmental factors and to define a methodology for phase shift data analysis processing. Three different methodologies were established. Degradation patterns and changes in the distributions of the data across the different samples are noticeable in all of the methodologies and although the methodologies are not able to represent the complexity of the phase shift data in its entirety, they are able to show changes on phase in different glass surfaces and show the potential of phase shift data analysis.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74545373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300572
A. Desai, I. Mukhopadhyay, A. Ray
Recently many regulatory commissions have compulsion the Forecasting, Scheduling, Deviation Settlement of renewable sources on 15 Minute time block basis. According this regulation the developer has given an exact Scheduling and forecasting of generation within the permissible limit, if it crosses the limit than developer has to pay the deviation charges as decided by regulatory commission. In this paper we have did the economic modeling with possibility of error throughout the year with respect to variation of season, climate change etc. With some assumption we have calculated the deviation charges with possibility of error in Scheduling and forecasting based on that we have developed the economic modeling for Scheduling and forecasting and validate with some parameters which shows that the compulsion of Forecasting and scheduling of solar energy can leads to revenue loss from 0.05% to 2%.
{"title":"Economic Modeling of Deviation Settlement under Solar Forecasting and Scheduling","authors":"A. Desai, I. Mukhopadhyay, A. Ray","doi":"10.1109/PVSC45281.2020.9300572","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300572","url":null,"abstract":"Recently many regulatory commissions have compulsion the Forecasting, Scheduling, Deviation Settlement of renewable sources on 15 Minute time block basis. According this regulation the developer has given an exact Scheduling and forecasting of generation within the permissible limit, if it crosses the limit than developer has to pay the deviation charges as decided by regulatory commission. In this paper we have did the economic modeling with possibility of error throughout the year with respect to variation of season, climate change etc. With some assumption we have calculated the deviation charges with possibility of error in Scheduling and forecasting based on that we have developed the economic modeling for Scheduling and forecasting and validate with some parameters which shows that the compulsion of Forecasting and scheduling of solar energy can leads to revenue loss from 0.05% to 2%.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72856070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300404
A. Kottantharayil, Albin Varghese, V. Kuthanazhi, N. Shiradkar
We report a technical survey of the Solar Pump Irrigators Cooperative Enterprise (SPICE), which started operation in May 2016. Survey mostly followed the methodology developed as part of the All India Survey of PV Module Reliability. High rates of PV module performance degradation, high rate of soiling, and instances of PV panel shadowing due to overgrowth of crop are observed. Leveraging the scale brought in by the cooperative model for addressing the technical issues, by better negotiations for quality hardware, and training of farmers for better operation and maintenance of the PV systems could improve the economic yield of the agrophotovoltaic experiments like SPICE.
{"title":"Technical Survey of Solar Pump Irrigators Cooperative Enterprise in Dhundi, Gujarat, India","authors":"A. Kottantharayil, Albin Varghese, V. Kuthanazhi, N. Shiradkar","doi":"10.1109/PVSC45281.2020.9300404","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300404","url":null,"abstract":"We report a technical survey of the Solar Pump Irrigators Cooperative Enterprise (SPICE), which started operation in May 2016. Survey mostly followed the methodology developed as part of the All India Survey of PV Module Reliability. High rates of PV module performance degradation, high rate of soiling, and instances of PV panel shadowing due to overgrowth of crop are observed. Leveraging the scale brought in by the cooperative model for addressing the technical issues, by better negotiations for quality hardware, and training of farmers for better operation and maintenance of the PV systems could improve the economic yield of the agrophotovoltaic experiments like SPICE.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73645738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300478
O. Nwakanma, A. Morales-Acevedo, V. Subramaniam
In this study, we carried out surface post-deposition treatment (PDT) on the CIGSe layer with heavier alkali metals using a non-vacuum method. X-ray diffraction studies confirmed that no secondary phases forms after the PDT. Morphological studies using scanning electron microscopy showed the presence of some enlarged grains after PDT with a substantial increase in mobility from Hall effect measurements. Further topographical characterization using atomic force microscopy (AFM) shows a reduction in peak-to-peak surface morphology due to the PDT. The comparison of the bandgap values after PDT showed a slight variation due to variation in the In/Ga ratios. The Raman spectroscopy of all the samples exhibited only the A1 characteristic mode of the chalcopyrite structures with a shoulder attributed to the presence of ordered vacancy layers (OVC) formed by the alkali metal secondary phases.
{"title":"Study Of The Effects Of Non-Vacuum Deposited Alkali-Metals On Copper-Indium-Gallium-Selenide Absorber Layers For Solar Cells","authors":"O. Nwakanma, A. Morales-Acevedo, V. Subramaniam","doi":"10.1109/PVSC45281.2020.9300478","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300478","url":null,"abstract":"In this study, we carried out surface post-deposition treatment (PDT) on the CIGSe layer with heavier alkali metals using a non-vacuum method. X-ray diffraction studies confirmed that no secondary phases forms after the PDT. Morphological studies using scanning electron microscopy showed the presence of some enlarged grains after PDT with a substantial increase in mobility from Hall effect measurements. Further topographical characterization using atomic force microscopy (AFM) shows a reduction in peak-to-peak surface morphology due to the PDT. The comparison of the bandgap values after PDT showed a slight variation due to variation in the In/Ga ratios. The Raman spectroscopy of all the samples exhibited only the A1 characteristic mode of the chalcopyrite structures with a shoulder attributed to the presence of ordered vacancy layers (OVC) formed by the alkali metal secondary phases.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73788041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300497
S. Bista, Dengbing Li, Zhaoning Song, R. Awni, S. Rijal, Chen Lei, C. Grice, Manoj K. Jamarkattel, A. Phillips, M. Heben, R. Ellingson, Yanfa Yan
Copper (Cu) doping is a crucial process to improve the hole concentration in CdTe absorber layer and reduce the back-barrier height for efficient CdTe solar cells. However, excess Cu creates detrimental defects and deteriorates device stability due to its high diffusivity. Here, we introduce a wet chemical method to incorporate Cu in CdTe using a CuCl solution. This approach allows a better control of Cu doping than the conventional method using evaporated Cu. Our investigation shows that the CuCl treatment can significantly improve the overall device performances due to an increased carrier concentration in the CuCl treated CdTe absorber layer. Furthermore, the CuCl treated devices show a longer minority carrier lifetime than the conventional Cu treated devices.
{"title":"Solution Processed CuCl treatment for efficient CdS/CdTe Solar Cells","authors":"S. Bista, Dengbing Li, Zhaoning Song, R. Awni, S. Rijal, Chen Lei, C. Grice, Manoj K. Jamarkattel, A. Phillips, M. Heben, R. Ellingson, Yanfa Yan","doi":"10.1109/PVSC45281.2020.9300497","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300497","url":null,"abstract":"Copper (Cu) doping is a crucial process to improve the hole concentration in CdTe absorber layer and reduce the back-barrier height for efficient CdTe solar cells. However, excess Cu creates detrimental defects and deteriorates device stability due to its high diffusivity. Here, we introduce a wet chemical method to incorporate Cu in CdTe using a CuCl solution. This approach allows a better control of Cu doping than the conventional method using evaporated Cu. Our investigation shows that the CuCl treatment can significantly improve the overall device performances due to an increased carrier concentration in the CuCl treated CdTe absorber layer. Furthermore, the CuCl treated devices show a longer minority carrier lifetime than the conventional Cu treated devices.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73869557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300845
Eduardo Camarillo Abad, H. Joyce, L. Hirst
Ever-thinner solar cells are currently of interest to the photovoltaics community and demand the introduction of light-trapping techniques to retain a competitive photovoltaic performance. This work presents a framework for a guided light-trapping design applied to an ultra-thin (< 100 nm) solar cell. The framework is based on a fundamental study of the waveguide modes supported by a realistic device architecture. Mode-coupling is ensured by introducing a scattering layer according to its Fourier spectrum. The framework can be applied to any device architecture and for single or multiple wavelength absorption enhancement, having the flexibility to attain high-efficiency in ever-thinner photovoltaics.
{"title":"Light-trapping Optimisation Framework Based on Fourier-space Grating Design for Coupling to Waveguide Modes in an Ultra-thin Solar Cell","authors":"Eduardo Camarillo Abad, H. Joyce, L. Hirst","doi":"10.1109/PVSC45281.2020.9300845","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300845","url":null,"abstract":"Ever-thinner solar cells are currently of interest to the photovoltaics community and demand the introduction of light-trapping techniques to retain a competitive photovoltaic performance. This work presents a framework for a guided light-trapping design applied to an ultra-thin (< 100 nm) solar cell. The framework is based on a fundamental study of the waveguide modes supported by a realistic device architecture. Mode-coupling is ensured by introducing a scattering layer according to its Fourier spectrum. The framework can be applied to any device architecture and for single or multiple wavelength absorption enhancement, having the flexibility to attain high-efficiency in ever-thinner photovoltaics.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74035656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300670
M. H. Riaz, Hassan Imran, N. Z. Butt
Agrivoltaic systems are innovative production systems for dual production of solar energy and agriculture from the same land. The technology has a great potential to holistically address food-energy-water challenges across globe. The design of solar PV arrays for agrivoltaics differs from a standard solar system due to the constraints of shading at the crop level. We explore optimization of PV array row density for fixed tilt bifacial PV for a given crop and the food-energy productivity requirements from the system. Bifacial PV arrays in vertical tilt facing East/West are compared to North/South faced bifacial PV arrays at fixed optimal tilt and relative productivity of energy and food at a given array density is investigated using daily temporal calculations of sunlight at PV and crop levels. We further explore the effect of tilt angle for fixed tilt agrivoltaic systems and explore its effect on energy and drop shadows on crops for the two PV orientations.
{"title":"Optimization of PV Array Density for Fixed Tilt Bifacial Solar Panels for Efficient Agrivoltaic Systems","authors":"M. H. Riaz, Hassan Imran, N. Z. Butt","doi":"10.1109/PVSC45281.2020.9300670","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300670","url":null,"abstract":"Agrivoltaic systems are innovative production systems for dual production of solar energy and agriculture from the same land. The technology has a great potential to holistically address food-energy-water challenges across globe. The design of solar PV arrays for agrivoltaics differs from a standard solar system due to the constraints of shading at the crop level. We explore optimization of PV array row density for fixed tilt bifacial PV for a given crop and the food-energy productivity requirements from the system. Bifacial PV arrays in vertical tilt facing East/West are compared to North/South faced bifacial PV arrays at fixed optimal tilt and relative productivity of energy and food at a given array density is investigated using daily temporal calculations of sunlight at PV and crop levels. We further explore the effect of tilt angle for fixed tilt agrivoltaic systems and explore its effect on energy and drop shadows on crops for the two PV orientations.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84201570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300810
Austin J. Snyder, Jacob M. Gibbs, Manoj K. Jamarkattel, A. Phillips, M. Heben
Doping control of the emitter is critically important to high performance thin film photovoltaic devices. Here, we deposit magnesium zinc oxide (MZO) thin films for use as the emitter of CdTe-based devices through cosputtering of ZnO and MgO or MgF. The bandgap and sheet resistance of the MZO films are measured before and after the films are thermally processed under vacuum or in He environments. Through annealing of the films, they become conductive, but little bandgap or sheet resistance differences can be determined between the films deposited using the MgO target or the MgF target. Devices will be completed to determine if the addition of fluorine to the MZO film affects the emitter doping during device processing.
{"title":"Doping Control of MgxZn1-xO Emitter through Fluorine Incorporation","authors":"Austin J. Snyder, Jacob M. Gibbs, Manoj K. Jamarkattel, A. Phillips, M. Heben","doi":"10.1109/PVSC45281.2020.9300810","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300810","url":null,"abstract":"Doping control of the emitter is critically important to high performance thin film photovoltaic devices. Here, we deposit magnesium zinc oxide (MZO) thin films for use as the emitter of CdTe-based devices through cosputtering of ZnO and MgO or MgF. The bandgap and sheet resistance of the MZO films are measured before and after the films are thermally processed under vacuum or in He environments. Through annealing of the films, they become conductive, but little bandgap or sheet resistance differences can be determined between the films deposited using the MgO target or the MgF target. Devices will be completed to determine if the addition of fluorine to the MZO film affects the emitter doping during device processing.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84979904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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