Pub Date : 2021-06-20DOI: 10.1109/PVSC43889.2021.9518738
U. Heitmann, J. Bartsch, S. Kluska, Nima Huschmand, Jana Wulf, D. Lackner, F. Dimroth, S. Janz
On the route to a high efficiency glued tandem solar cell fabricated using a ZnO-based transparent conductive adhesive, several challenges were encountered. By lowering the pressure during the annealing of the adhesive to 0.3 or 1 kg/cm2, the III-V surface did not crack and only minor delamination along the samples edge was observed. A fabricated tandem solar cell showed limitations due to voids within the bond (low fill factor) and a low current density due to a missing anti-reflective coating and reflectance at the bond layer. A sputtered TiO2:Nb contact layer showed a low ohmic contact on p-GaAs and thereby is suitable for implementation at the bond/III-V interface, which would significantly lower the reflectance at the bond.
{"title":"Challenges in the Fabrication of a Glued III-V on Si Tandem Solar Cell Using a ZnO-Based TCA","authors":"U. Heitmann, J. Bartsch, S. Kluska, Nima Huschmand, Jana Wulf, D. Lackner, F. Dimroth, S. Janz","doi":"10.1109/PVSC43889.2021.9518738","DOIUrl":"https://doi.org/10.1109/PVSC43889.2021.9518738","url":null,"abstract":"On the route to a high efficiency glued tandem solar cell fabricated using a ZnO-based transparent conductive adhesive, several challenges were encountered. By lowering the pressure during the annealing of the adhesive to 0.3 or 1 kg/cm2, the III-V surface did not crack and only minor delamination along the samples edge was observed. A fabricated tandem solar cell showed limitations due to voids within the bond (low fill factor) and a low current density due to a missing anti-reflective coating and reflectance at the bond layer. A sputtered TiO2:Nb contact layer showed a low ohmic contact on p-GaAs and thereby is suitable for implementation at the bond/III-V interface, which would significantly lower the reflectance at the bond.","PeriodicalId":6788,"journal":{"name":"2021 IEEE 48th Photovoltaic Specialists Conference (PVSC)","volume":"9 31","pages":"1121-1124"},"PeriodicalIF":0.0,"publicationDate":"2021-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91547044","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 : 2021-06-20DOI: 10.1109/PVSC43889.2021.9519033
Haohui Liu, Manav Arora, Kang Jian, Lu Zhao
IV curve tracing is a useful method for diagnosing PV array underperformance problems. Its shape and values can reveal internal health issues of devices, caused by degradation, mismatch, cell cracks, or external issues of operating environment, such as shading and soiling. In recent years, there is a trend for string inverters to provide IV scanning function, which enables large scale high throughput IV curve diagnosis for PV farms. For this application, it is important to have automatic diagnosis and reporting instead of manual interpretation. In this work, we propose a diagnosis framework based on deep learning to classify various DC underperformance issues or faults from IV curves. The initial model training is accomplished by simulation of IV curves for a wide range of possible scenarios. Preliminary results indicate that the model is capable of discerning major classes of issues to a very high degree of accuracy.
{"title":"Automatic IV Curve Diagnosis with Deep Learning","authors":"Haohui Liu, Manav Arora, Kang Jian, Lu Zhao","doi":"10.1109/PVSC43889.2021.9519033","DOIUrl":"https://doi.org/10.1109/PVSC43889.2021.9519033","url":null,"abstract":"IV curve tracing is a useful method for diagnosing PV array underperformance problems. Its shape and values can reveal internal health issues of devices, caused by degradation, mismatch, cell cracks, or external issues of operating environment, such as shading and soiling. In recent years, there is a trend for string inverters to provide IV scanning function, which enables large scale high throughput IV curve diagnosis for PV farms. For this application, it is important to have automatic diagnosis and reporting instead of manual interpretation. In this work, we propose a diagnosis framework based on deep learning to classify various DC underperformance issues or faults from IV curves. The initial model training is accomplished by simulation of IV curves for a wide range of possible scenarios. Preliminary results indicate that the model is capable of discerning major classes of issues to a very high degree of accuracy.","PeriodicalId":6788,"journal":{"name":"2021 IEEE 48th Photovoltaic Specialists Conference (PVSC)","volume":"21 6","pages":"2242-2246"},"PeriodicalIF":0.0,"publicationDate":"2021-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91427642","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 : 2021-06-20DOI: 10.1109/PVSC43889.2021.9518523
Samuel J. Ellis, Larry Maple, T. Shimpi, A. Pavgi, G. Tamizhmani, Walajabad Sampth, K. Barth
New photovoltaic module encapsulation technology is under development that can help achieve Department of Energy SunShot utility solar cost goals of $0.03/kWh by lowering manufacturing cost and improving module reliability. Vacuum lamination-based encapsulation can take up to 20 minutes to complete, has high operating cost, and requires a large factory footprint. Current encapsulation architectures are the source of several module degradation issues. A new module architecture and streamlined process is demonstrated to show under 30 second cycle time for each process and improved reliability. Modules are fabricated on industry ready tools and undergo several accelerated tests.
{"title":"Reliability and Manufacturing Demonstrations of a New Photovoltaic Module Architecture and Streamlined Approach to Encpasulation","authors":"Samuel J. Ellis, Larry Maple, T. Shimpi, A. Pavgi, G. Tamizhmani, Walajabad Sampth, K. Barth","doi":"10.1109/PVSC43889.2021.9518523","DOIUrl":"https://doi.org/10.1109/PVSC43889.2021.9518523","url":null,"abstract":"New photovoltaic module encapsulation technology is under development that can help achieve Department of Energy SunShot utility solar cost goals of $0.03/kWh by lowering manufacturing cost and improving module reliability. Vacuum lamination-based encapsulation can take up to 20 minutes to complete, has high operating cost, and requires a large factory footprint. Current encapsulation architectures are the source of several module degradation issues. A new module architecture and streamlined process is demonstrated to show under 30 second cycle time for each process and improved reliability. Modules are fabricated on industry ready tools and undergo several accelerated tests.","PeriodicalId":6788,"journal":{"name":"2021 IEEE 48th Photovoltaic Specialists Conference (PVSC)","volume":"1 1","pages":"1504-1506"},"PeriodicalIF":0.0,"publicationDate":"2021-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80732307","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 : 2021-06-20DOI: 10.1109/PVSC43889.2021.9518862
K. Siraj, S. M. Ahsan, H. Khan
DC Power Systems or DC Nanogrids (NGs) in modern homes are candidates for improving efficiency beyond the utility meter. DC distribution in these houses must be evaluated in the context of costs, load rating and spatial distribution along with optimum conductor usage to minimize the overall upfront and operational costs. This paper entails a framework to select the best-suited voltage for a residential DC NG with DC loads. The developed model considers loads and length of wires as variables, hence it is modular and scalable to larger residential units or commercial buildings. The model is tested from an efficiency and cost perspective at a typical residential house with 2.5 kW DC load with three distribution voltages i.e., 24V, 48V and 380V. Results show that 48V is the best candidate for the residential settings based on efficiency and techno-economic analysis incorporating conversion as well as distribution losses.
{"title":"Techno-economic Evaluation of Residential DC Power System for Multiple Distribution Voltages","authors":"K. Siraj, S. M. Ahsan, H. Khan","doi":"10.1109/PVSC43889.2021.9518862","DOIUrl":"https://doi.org/10.1109/PVSC43889.2021.9518862","url":null,"abstract":"DC Power Systems or DC Nanogrids (NGs) in modern homes are candidates for improving efficiency beyond the utility meter. DC distribution in these houses must be evaluated in the context of costs, load rating and spatial distribution along with optimum conductor usage to minimize the overall upfront and operational costs. This paper entails a framework to select the best-suited voltage for a residential DC NG with DC loads. The developed model considers loads and length of wires as variables, hence it is modular and scalable to larger residential units or commercial buildings. The model is tested from an efficiency and cost perspective at a typical residential house with 2.5 kW DC load with three distribution voltages i.e., 24V, 48V and 380V. Results show that 48V is the best candidate for the residential settings based on efficiency and techno-economic analysis incorporating conversion as well as distribution losses.","PeriodicalId":6788,"journal":{"name":"2021 IEEE 48th Photovoltaic Specialists Conference (PVSC)","volume":"20 1","pages":"0858-0862"},"PeriodicalIF":0.0,"publicationDate":"2021-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79694000","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 : 2021-06-20DOI: 10.1109/PVSC43889.2021.9519100
Mohamed Ould Salem, Kunal J. Tiwari, R. Fonoll, S. Giraldo, M. Placidi, Y. Sánchez, V. Izquierdo‐Roca, C. Malerba, M. Valentini, D. Sylla, A. Thomere, D. O. Ahmedou, E. Saucedo, A. Pérez‐Rodríguez, Z. J. Li-Kao
This work combines experimental results and modelling assessment of high Ga, wide bandgap CIGSe solar cells fabricated on a transparent glass/TCO substrate yielding efficiencies above 10% without AR coating. An alkali pre-deposition treatment is performed, and the material analysis of the devices by GDOES, XRD and Raman spectroscopy reveals a significant improvement of the Ga incorporation to the matrix in the presence of an alkali element. The optoelectronic characterization of the solar cells reveals an absolute increase by more than two efficiency points for the alkali-doped samples, overcoming the 10% threshold and being, at the time of this work, the highest reported efficiency for a wide bandgap CIGSe solar cell on transparent substrate. The use of the device developed in this study in a full chalcogenide tandem configuration is assessed by numerical modeling, and different improvement pathways for tandem devices are proposed. Specifically, the replacement of the MoSe2 back interlayer by a more transparent MoO3 is deemed critical in tandem configuration.
{"title":"Wide bandgap CIGSe solar cells on transparent substrates above 10% efficiency","authors":"Mohamed Ould Salem, Kunal J. Tiwari, R. Fonoll, S. Giraldo, M. Placidi, Y. Sánchez, V. Izquierdo‐Roca, C. Malerba, M. Valentini, D. Sylla, A. Thomere, D. O. Ahmedou, E. Saucedo, A. Pérez‐Rodríguez, Z. J. Li-Kao","doi":"10.1109/PVSC43889.2021.9519100","DOIUrl":"https://doi.org/10.1109/PVSC43889.2021.9519100","url":null,"abstract":"This work combines experimental results and modelling assessment of high Ga, wide bandgap CIGSe solar cells fabricated on a transparent glass/TCO substrate yielding efficiencies above 10% without AR coating. An alkali pre-deposition treatment is performed, and the material analysis of the devices by GDOES, XRD and Raman spectroscopy reveals a significant improvement of the Ga incorporation to the matrix in the presence of an alkali element. The optoelectronic characterization of the solar cells reveals an absolute increase by more than two efficiency points for the alkali-doped samples, overcoming the 10% threshold and being, at the time of this work, the highest reported efficiency for a wide bandgap CIGSe solar cell on transparent substrate. The use of the device developed in this study in a full chalcogenide tandem configuration is assessed by numerical modeling, and different improvement pathways for tandem devices are proposed. Specifically, the replacement of the MoSe2 back interlayer by a more transparent MoO3 is deemed critical in tandem configuration.","PeriodicalId":6788,"journal":{"name":"2021 IEEE 48th Photovoltaic Specialists Conference (PVSC)","volume":"35 1","pages":"1389-1392"},"PeriodicalIF":0.0,"publicationDate":"2021-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81058559","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 : 2021-06-20DOI: 10.1109/PVSC43889.2021.9518543
S. Hara, T. Yoshioka
High-quality operation and maintenance services are vital to the health of large photovoltaic (PV) power plants. Diagnosis methods using the electric energy data measured by PV inverters (PVIs) are widely applicable and cost-effective. It is usual that PVIs have connection of PV modules exceeding those rated power. In this work, it is reported that the power clippings by PVIs can occur even in the winter. Exclusion of the measured data affected by the power clipping causes the ratios of two PVI’s electric energies to be stabilized. It is demonstrated that the string disconnections can be detected using the ratios.
{"title":"Exclusion of PV Inverter Measurement Data Affected by Power Clipping and Detection of String Disconnection","authors":"S. Hara, T. Yoshioka","doi":"10.1109/PVSC43889.2021.9518543","DOIUrl":"https://doi.org/10.1109/PVSC43889.2021.9518543","url":null,"abstract":"High-quality operation and maintenance services are vital to the health of large photovoltaic (PV) power plants. Diagnosis methods using the electric energy data measured by PV inverters (PVIs) are widely applicable and cost-effective. It is usual that PVIs have connection of PV modules exceeding those rated power. In this work, it is reported that the power clippings by PVIs can occur even in the winter. Exclusion of the measured data affected by the power clipping causes the ratios of two PVI’s electric energies to be stabilized. It is demonstrated that the string disconnections can be detected using the ratios.","PeriodicalId":6788,"journal":{"name":"2021 IEEE 48th Photovoltaic Specialists Conference (PVSC)","volume":"27 12 1","pages":"0979-0981"},"PeriodicalIF":0.0,"publicationDate":"2021-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83527856","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 : 2021-06-20DOI: 10.1109/PVSC43889.2021.9519097
Mahmoud M. Elsadek, Abdullah Hatem, Basem Eliwa, A. E. Shimy, A. Ashraf, T. Hatem
The Industrial sector is considered the base of the economy for many countries. In Egypt industry participate with 20% of the country's national income. 10th of Ramadan city is one of the oldest industrial cities built in Egypt. It is now considered the biggest industrial city in Egypt with more than 2000 factories, with total investment of EGP 84bn. On the other hand, these factories may have a bad impact on the environment because the electricity they consume is from non-renewable sources. Moreover, many of them produce CO2 gas emissions that have a bad impact on the environment. The aim of this report is to set up a solar farm that can cover the electricity needed for these factories to operate. By this action the CO2 emissions produced from power plants run by fossils fuels or natural gas will stop.
{"title":"Industrial estate Powered by Photovoltacs in Egypt : a study of potential, challenges and Environmental Impact","authors":"Mahmoud M. Elsadek, Abdullah Hatem, Basem Eliwa, A. E. Shimy, A. Ashraf, T. Hatem","doi":"10.1109/PVSC43889.2021.9519097","DOIUrl":"https://doi.org/10.1109/PVSC43889.2021.9519097","url":null,"abstract":"The Industrial sector is considered the base of the economy for many countries. In Egypt industry participate with 20% of the country's national income. 10th of Ramadan city is one of the oldest industrial cities built in Egypt. It is now considered the biggest industrial city in Egypt with more than 2000 factories, with total investment of EGP 84bn. On the other hand, these factories may have a bad impact on the environment because the electricity they consume is from non-renewable sources. Moreover, many of them produce CO2 gas emissions that have a bad impact on the environment. The aim of this report is to set up a solar farm that can cover the electricity needed for these factories to operate. By this action the CO2 emissions produced from power plants run by fossils fuels or natural gas will stop.","PeriodicalId":6788,"journal":{"name":"2021 IEEE 48th Photovoltaic Specialists Conference (PVSC)","volume":"103 1","pages":"0614-0616"},"PeriodicalIF":0.0,"publicationDate":"2021-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88804189","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 : 2021-06-20DOI: 10.1109/PVSC43889.2021.9518840
V. Palekis, W. Wang, Sheikh Tawsif Elahi, Md Zahangir Alom, C. Ferekides
In this paper the effect of indium (In) doping on CdTe thin film solar cells was investigated. CdTe thin films were deposited using the elemental vapor transport (EVT) technique under various Cd/Te gas phase ratios and In vapor concentrations. Solar cells of the superstrate configuration (glass/TCO/CdS/n-CdTe/p-ZnTe/BC) have been fabricated and characterized. There was a correlation between the concentration of In in the vapor phase and net n-type doping for CdTe devices fabricated near Cd/Te stoichiometric ratio; increasing the amount of indium resulted in higher n-type doping. From C-V measurements doping levels >1016cm-3 were measured. Devices were also fabricated at various Cd/Te vapor ratios. Films deposited at lower Cd/Te vapor ratios (i.e., Te-rich) exhibited higher n-type doping. Lower Cd/Te ratios favor the creation of Cd-vacancies which are needed for substitutional In doping, which can explain why the net doping increases at lower Cd/Te ratios. Minority-carrier lifetimes of ~8ns were achieved for intrinsic and In-doped films deposited under Cd-rich conditions.
{"title":"Thin Film Solar Cells with n-type CdTe Absorber and p-type ZnTe Window Layers","authors":"V. Palekis, W. Wang, Sheikh Tawsif Elahi, Md Zahangir Alom, C. Ferekides","doi":"10.1109/PVSC43889.2021.9518840","DOIUrl":"https://doi.org/10.1109/PVSC43889.2021.9518840","url":null,"abstract":"In this paper the effect of indium (In) doping on CdTe thin film solar cells was investigated. CdTe thin films were deposited using the elemental vapor transport (EVT) technique under various Cd/Te gas phase ratios and In vapor concentrations. Solar cells of the superstrate configuration (glass/TCO/CdS/n-CdTe/p-ZnTe/BC) have been fabricated and characterized. There was a correlation between the concentration of In in the vapor phase and net n-type doping for CdTe devices fabricated near Cd/Te stoichiometric ratio; increasing the amount of indium resulted in higher n-type doping. From C-V measurements doping levels >1016cm-3 were measured. Devices were also fabricated at various Cd/Te vapor ratios. Films deposited at lower Cd/Te vapor ratios (i.e., Te-rich) exhibited higher n-type doping. Lower Cd/Te ratios favor the creation of Cd-vacancies which are needed for substitutional In doping, which can explain why the net doping increases at lower Cd/Te ratios. Minority-carrier lifetimes of ~8ns were achieved for intrinsic and In-doped films deposited under Cd-rich conditions.","PeriodicalId":6788,"journal":{"name":"2021 IEEE 48th Photovoltaic Specialists Conference (PVSC)","volume":"46 1","pages":"1293-1297"},"PeriodicalIF":0.0,"publicationDate":"2021-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84702898","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 : 2021-06-20DOI: 10.1109/PVSC43889.2021.9519025
M. Kelzenberg, S. Loke, H. Atwater
The emergence of perovskite solar cells has brought increased attention to the importance of stability testing and continuous maximum-power-point tracking (MPPT) for the characterization of experimental solar cells, even at early stages of R&D. As many experimental cells are often fabricated in multitude, e.g., as multiple ‘pixels’ on each substrate, it is desirable to have a large number of measurement instruments, each of which can be committed for long periods of time, ranging from days to weeks or longer, to characterize the performance of each individual research device. Here, we present a low-cost measurement circuit capable of performing and recording simultaneous measurements on up to 12 devices, including MPPT, I–V sweeps, fixed-voltage, and fixed-current operation. The circuit is suitable for cells with ISC up to ~150 mA and VOC up to ~3 V. Complete schematics, PCB layouts, and firmware are available online, offered for use and improvement by the greater PV research community.
{"title":"Low-cost Open-source 12-channel MPPT Data Logger for Solar Cell Research","authors":"M. Kelzenberg, S. Loke, H. Atwater","doi":"10.1109/PVSC43889.2021.9519025","DOIUrl":"https://doi.org/10.1109/PVSC43889.2021.9519025","url":null,"abstract":"The emergence of perovskite solar cells has brought increased attention to the importance of stability testing and continuous maximum-power-point tracking (MPPT) for the characterization of experimental solar cells, even at early stages of R&D. As many experimental cells are often fabricated in multitude, e.g., as multiple ‘pixels’ on each substrate, it is desirable to have a large number of measurement instruments, each of which can be committed for long periods of time, ranging from days to weeks or longer, to characterize the performance of each individual research device. Here, we present a low-cost measurement circuit capable of performing and recording simultaneous measurements on up to 12 devices, including MPPT, I–V sweeps, fixed-voltage, and fixed-current operation. The circuit is suitable for cells with ISC up to ~150 mA and VOC up to ~3 V. Complete schematics, PCB layouts, and firmware are available online, offered for use and improvement by the greater PV research community.","PeriodicalId":6788,"journal":{"name":"2021 IEEE 48th Photovoltaic Specialists Conference (PVSC)","volume":"21 1","pages":"1204-1207"},"PeriodicalIF":0.0,"publicationDate":"2021-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80606447","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 : 2021-06-20DOI: 10.1109/PVSC43889.2021.9518587
Wafa Alnaqbi, Juveiriah M. Ashraf, A. Rezk, S. Abdul Hadi, Aisha Alhammadi, A. Nayfeh
In this work the effect of coating fused silica, and on Ge by molybdenum disulfide (MoS2) nanoparticles was studied. The nanoparticles were chemically exfoliated from a powder. The MoS2 NPs were drop casted and spin coated on the substrates through three equal coating steps of 100 µL, reaching to a total of 300 µL. The samples were characterized using SEM, optical microscopy, XRD and UV–VIS spectrophotometer. The MoS2 NPs were observable under UV illumination by the optical microscope due to the red photoluminescence. The reflectance measurements showed a significant decrease at the UV-Vis (250 to 850 nm) range, and an increase in the NIR (850 to 1500 nm) range for the low temperature PECVD Ge films samples. Moreover, the reduced transmission on the fused silica samples verified that the MoS2 nanoparticles can greatly enhance absorbance, rendering them an appropriate candidate for solar applications.
{"title":"Absorption in the UV-Vis Region from Chemically Exfoliated MoS2 Nanoparticles for Solar Applications","authors":"Wafa Alnaqbi, Juveiriah M. Ashraf, A. Rezk, S. Abdul Hadi, Aisha Alhammadi, A. Nayfeh","doi":"10.1109/PVSC43889.2021.9518587","DOIUrl":"https://doi.org/10.1109/PVSC43889.2021.9518587","url":null,"abstract":"In this work the effect of coating fused silica, and on Ge by molybdenum disulfide (MoS2) nanoparticles was studied. The nanoparticles were chemically exfoliated from a powder. The MoS2 NPs were drop casted and spin coated on the substrates through three equal coating steps of 100 µL, reaching to a total of 300 µL. The samples were characterized using SEM, optical microscopy, XRD and UV–VIS spectrophotometer. The MoS2 NPs were observable under UV illumination by the optical microscope due to the red photoluminescence. The reflectance measurements showed a significant decrease at the UV-Vis (250 to 850 nm) range, and an increase in the NIR (850 to 1500 nm) range for the low temperature PECVD Ge films samples. Moreover, the reduced transmission on the fused silica samples verified that the MoS2 nanoparticles can greatly enhance absorbance, rendering them an appropriate candidate for solar applications.","PeriodicalId":6788,"journal":{"name":"2021 IEEE 48th Photovoltaic Specialists Conference (PVSC)","volume":"31 1","pages":"0784-0787"},"PeriodicalIF":0.0,"publicationDate":"2021-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80680478","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：