Pub Date : 2022-06-05DOI: 10.1109/pvsc48317.2022.9938857
A. Danielson, Carey Reich, Mason Mahaffey, A. Onno, Z. Holman, W. Sampath
The use of native oxides have historically been used in numerous PV technologies to passivate surfaces and improve voltage and conversion efficiency. Using XPS, in this study we observe the growth of tellurium oxides on the back surface of CdSeTe films when stored in air for several weeks. We note considerable differences in the prevalence of tellurium oxides between as-deposited and chlorine-treated films. Finally, external radiative efficiency measurements show that ERE correlates strongly with increased tellurium oxide formation. This indicates that the oxide layer is passivating the back surface of CdSeTe, a crucial step towards improving the open-circuit voltage.
{"title":"Native Oxide Growth on CdSeTe for Improved Back Surface Passivation","authors":"A. Danielson, Carey Reich, Mason Mahaffey, A. Onno, Z. Holman, W. Sampath","doi":"10.1109/pvsc48317.2022.9938857","DOIUrl":"https://doi.org/10.1109/pvsc48317.2022.9938857","url":null,"abstract":"The use of native oxides have historically been used in numerous PV technologies to passivate surfaces and improve voltage and conversion efficiency. Using XPS, in this study we observe the growth of tellurium oxides on the back surface of CdSeTe films when stored in air for several weeks. We note considerable differences in the prevalence of tellurium oxides between as-deposited and chlorine-treated films. Finally, external radiative efficiency measurements show that ERE correlates strongly with increased tellurium oxide formation. This indicates that the oxide layer is passivating the back surface of CdSeTe, a crucial step towards improving the open-circuit voltage.","PeriodicalId":435386,"journal":{"name":"2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114687038","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 : 2022-06-05DOI: 10.1109/pvsc48317.2022.9938586
Diego Colombara
The attractiveness of Cu(In,Ga)Se2 (CIGS) is still curtailed by the R&D gap that separates it from silicon. Overcoming the gap requires strategic approaches, leaving plenty of room for research in industry and lab. Yet, the progress of this technology hinges on our understanding of the diffusion phenomena that occur during and after the material growth, particularly in combination with alkali metal doping. This contribution introduces a sponge cake simplified model of atomic diffusion in CIGS, based on insights drawn from recent and older (but crucial) literature. The concept of anisotropy-induced fluctuations emerges, with the ambition to stir the community and unlock the full potential of the technology. Keywords-Alkali metal doping, PDT, atomic diffusion, texture.
{"title":"Anisotropy-induced fluctuations in Cu(In, Ga)Se2","authors":"Diego Colombara","doi":"10.1109/pvsc48317.2022.9938586","DOIUrl":"https://doi.org/10.1109/pvsc48317.2022.9938586","url":null,"abstract":"The attractiveness of Cu(In,Ga)Se2 (CIGS) is still curtailed by the R&D gap that separates it from silicon. Overcoming the gap requires strategic approaches, leaving plenty of room for research in industry and lab. Yet, the progress of this technology hinges on our understanding of the diffusion phenomena that occur during and after the material growth, particularly in combination with alkali metal doping. This contribution introduces a sponge cake simplified model of atomic diffusion in CIGS, based on insights drawn from recent and older (but crucial) literature. The concept of anisotropy-induced fluctuations emerges, with the ambition to stir the community and unlock the full potential of the technology. Keywords-Alkali metal doping, PDT, atomic diffusion, texture.","PeriodicalId":435386,"journal":{"name":"2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126544962","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 : 2022-06-05DOI: 10.1109/PVSC48317.2022.9938802
M. M. Ali, Nur Jahan Beanta Sorower, Abu Niem Seum, Md. Shifain Mahathir Alvi, Rawnak Reza Raka, Mohaimenul Islam, Md. Mosaddequr Rahman
Residential buildings, being an unavoidable part of day-to-day life, can have an impactful subsidy to the Renewable Energy Source (RES). Therefore, in this work, the energy-focused outcome of integrating the BIPV (Building Integrated Photovoltaic) system into a pre-built residential building in Dhaka city has been assessed. To begin with, segmentation of the building into subsystems and incident energy estimation have been considered. The building encounters a total of 391.66 MWh of incident energy over the course of one year. Taking 17% panel efficiency and 32 % system losses into account, the system generates 45.80 MWh of electrical output energy per year without considering cloud impact. It is around 53 % higher than the energy requirement (21 MWh) of the building. The system remained grid independent for more than half a year. It can reduce the emission of carbon by about 20,751 kg. Assuming the longevity of the system to be 20 years, the financial analysis shows that the initial cost can be retrieved within 4 years. It demonstrates that the BIPV system can meet the energy demand of the studied building while reducing grid dependency and carbon emissions. .
{"title":"Performance Assessment of A Residential Building Integrated Photovoltaic (BIPV) System in Dhaka City","authors":"M. M. Ali, Nur Jahan Beanta Sorower, Abu Niem Seum, Md. Shifain Mahathir Alvi, Rawnak Reza Raka, Mohaimenul Islam, Md. Mosaddequr Rahman","doi":"10.1109/PVSC48317.2022.9938802","DOIUrl":"https://doi.org/10.1109/PVSC48317.2022.9938802","url":null,"abstract":"Residential buildings, being an unavoidable part of day-to-day life, can have an impactful subsidy to the Renewable Energy Source (RES). Therefore, in this work, the energy-focused outcome of integrating the BIPV (Building Integrated Photovoltaic) system into a pre-built residential building in Dhaka city has been assessed. To begin with, segmentation of the building into subsystems and incident energy estimation have been considered. The building encounters a total of 391.66 MWh of incident energy over the course of one year. Taking 17% panel efficiency and 32 % system losses into account, the system generates 45.80 MWh of electrical output energy per year without considering cloud impact. It is around 53 % higher than the energy requirement (21 MWh) of the building. The system remained grid independent for more than half a year. It can reduce the emission of carbon by about 20,751 kg. Assuming the longevity of the system to be 20 years, the financial analysis shows that the initial cost can be retrieved within 4 years. It demonstrates that the BIPV system can meet the energy demand of the studied building while reducing grid dependency and carbon emissions. .","PeriodicalId":435386,"journal":{"name":"2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127954964","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 : 2022-06-05DOI: 10.1109/pvsc48317.2022.9938767
Nicholas P. Irvin, D. Martinez Escobar, Aaron Wheeler, T. Leijtens, Hyunjong Lee, Annikki Santala, R. King, C. Honsberg, S. R. Kurtz
Increased temperatures generally reduce the efficiencies and life spans of photovoltaic modules. Experimental measurements show that thin-film GaAs modules operate more than 10°C cooler than Si modules. This study identifies the main thermal advantage of the GaAs modules as their high sub-bandgap reflection of 77%, which dwarfs the 15-26% measured on various Si architectures. This paper proves that the sub-bandgap reflection in modules with textured Si cells is fundamentally limited compared to reflection for cells without light trapping, due to the amplification of parasitic absorption that occurs with light trapping. N ow, this finding is being tested on perovskite-silicon tandems. It is expected that light trapping will increase the tandems' temperatures by several degrees.
{"title":"Deleterious Effect of Light Trapping on the Temperatures of Solar Modules","authors":"Nicholas P. Irvin, D. Martinez Escobar, Aaron Wheeler, T. Leijtens, Hyunjong Lee, Annikki Santala, R. King, C. Honsberg, S. R. Kurtz","doi":"10.1109/pvsc48317.2022.9938767","DOIUrl":"https://doi.org/10.1109/pvsc48317.2022.9938767","url":null,"abstract":"Increased temperatures generally reduce the efficiencies and life spans of photovoltaic modules. Experimental measurements show that thin-film GaAs modules operate more than 10°C cooler than Si modules. This study identifies the main thermal advantage of the GaAs modules as their high sub-bandgap reflection of 77%, which dwarfs the 15-26% measured on various Si architectures. This paper proves that the sub-bandgap reflection in modules with textured Si cells is fundamentally limited compared to reflection for cells without light trapping, due to the amplification of parasitic absorption that occurs with light trapping. N ow, this finding is being tested on perovskite-silicon tandems. It is expected that light trapping will increase the tandems' temperatures by several degrees.","PeriodicalId":435386,"journal":{"name":"2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125448689","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 : 2022-06-05DOI: 10.1109/PVSC48317.2022.9938779
Dipendra Pokhrel, Nini Rose Mathew, Suman Rijal, Ebin Bastola, Abasi Abudulimu, Tamanna Mariam, X. Mathew, A. Phillips, M. Heben, Zhaoning Song, Yanfa Yan, R. Ellingson
Antimony sulfide $(text{Sb}_{2}mathrm{S}_{3})$ represents an emerging thin-film photovoltaic light-absorber, with potential as a wide gap top cell for high-efficiency tandem devices. Here, we report the development and characterization of $text{Sb}_{2}mathrm{S}_{3}$ absorber layers prepared by the hydrothermal method. Completed devices based on chemical bath deposited cadmium sulfide (CdS) and Spiro-OMeTAD as the electron-and hole-transport layers, respectively, have yielded promising power conversion efficiencies as high as 5.5 %. Although the typical deficit reported between the Sb ${}_{2}mathrm{S}_{3}$ bandgap energy and the open-circuit voltage $(mathrm{V}_{text{OC}})$ remains high, we report high Voc values approaching 800 mV.
{"title":"Hydrothermally Deposited Antimony Sulfide Solar Cells with $mathrm{V}_{text{OC}}$ Approaching 800 mV","authors":"Dipendra Pokhrel, Nini Rose Mathew, Suman Rijal, Ebin Bastola, Abasi Abudulimu, Tamanna Mariam, X. Mathew, A. Phillips, M. Heben, Zhaoning Song, Yanfa Yan, R. Ellingson","doi":"10.1109/PVSC48317.2022.9938779","DOIUrl":"https://doi.org/10.1109/PVSC48317.2022.9938779","url":null,"abstract":"Antimony sulfide $(text{Sb}_{2}mathrm{S}_{3})$ represents an emerging thin-film photovoltaic light-absorber, with potential as a wide gap top cell for high-efficiency tandem devices. Here, we report the development and characterization of $text{Sb}_{2}mathrm{S}_{3}$ absorber layers prepared by the hydrothermal method. Completed devices based on chemical bath deposited cadmium sulfide (CdS) and Spiro-OMeTAD as the electron-and hole-transport layers, respectively, have yielded promising power conversion efficiencies as high as 5.5 %. Although the typical deficit reported between the Sb ${}_{2}mathrm{S}_{3}$ bandgap energy and the open-circuit voltage $(mathrm{V}_{text{OC}})$ remains high, we report high Voc values approaching 800 mV.","PeriodicalId":435386,"journal":{"name":"2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125650448","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 : 2022-06-05DOI: 10.1109/PVSC48317.2022.9938486
Xitong Zhu, M. Debije, A. Reinders
Flat luminescent solar concentrator PV (LSC-PV) devices have in development for nearly 45 years. However, to enhance their integration potential in buildings and vehicles, this study is focused on bent LSC-PV devices. LSC PV modules with a $20times20 mathrm{cm}^2$ top surface area and 6 different curvatures ($k$, from 1 to $10 mathrm{m}^{-1})$ have been designed in Dassault Systèmes Solidworks and simulated by means of ray tracing in Synopsys LightTools. These modules are 20 mm thick, are made of PMMA with 110 parts per million (ppm) of Lumogen Red 305 dye, and silicon solar cells attached only to their rectangular edges with a total PV cell coverage area of 80 cm2 per module. The simulation results show better optical and electrical performances for the bent LSC-PV modules than for flat planar modules. The performance increases with the increase of curvature; for instance, an LSC-PV module with a curvature of $mathrm{k}=10 mathrm{m}^{-1}$ is 40% more efficient than a flat reference. Furthermore, in this study, the effect of reflection layers and sizing of the front surface of the bent LSC PV modules on their performance is investigated.
{"title":"Ray Tracing of Bent Applications of Luminescent Solar Concentrator PV Modules","authors":"Xitong Zhu, M. Debije, A. Reinders","doi":"10.1109/PVSC48317.2022.9938486","DOIUrl":"https://doi.org/10.1109/PVSC48317.2022.9938486","url":null,"abstract":"Flat luminescent solar concentrator PV (LSC-PV) devices have in development for nearly 45 years. However, to enhance their integration potential in buildings and vehicles, this study is focused on bent LSC-PV devices. LSC PV modules with a $20times20 mathrm{cm}^2$ top surface area and 6 different curvatures ($k$, from 1 to $10 mathrm{m}^{-1})$ have been designed in Dassault Systèmes Solidworks and simulated by means of ray tracing in Synopsys LightTools. These modules are 20 mm thick, are made of PMMA with 110 parts per million (ppm) of Lumogen Red 305 dye, and silicon solar cells attached only to their rectangular edges with a total PV cell coverage area of 80 cm2 per module. The simulation results show better optical and electrical performances for the bent LSC-PV modules than for flat planar modules. The performance increases with the increase of curvature; for instance, an LSC-PV module with a curvature of $mathrm{k}=10 mathrm{m}^{-1}$ is 40% more efficient than a flat reference. Furthermore, in this study, the effect of reflection layers and sizing of the front surface of the bent LSC PV modules on their performance is investigated.","PeriodicalId":435386,"journal":{"name":"2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125711171","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 : 2022-06-05DOI: 10.1109/pvsc48317.2022.9938848
Christopher Hayes, A. Parikh, Mark Mikofski, Rounak Kharait
High-frequency measurements of solar resource from the Surface Radiation Budget Network (SURFRAD) from stations in NV, MT, SD, MS, PA, IL and CO were down-sampled from 1-minute to 1-hour and used to predict energy yield and sub-hourly modeling error. A Wavelet Variability Model (WVM) incorporating an estimated solar plant layout was used to determine the sub-hourly modeling error dependency for projects ranging in size from 1 MW to 1,000 MW. Additionally, sensitivity to inverter overbuild, DC to AC ratio, average cloud speed, interannual variability and geographic location were evaluated. By incorporating the WVM to smooth the irradiance inputs we found that annual sub-hourly modeling errors exhibited a nearly logarithmic decrease as project size increased. On average, the modeling error decreases quickly for the first 200 MW and begins to asymptote for 200 - 1,000 MW. The magnitude of annual modeling errors was highly influenced by DC/AC ratio, average cloud speed and the interannual variability of the solar resource. The results of this study were implemented to develop a project size dependent sub-hourly modeling error adjustment factor for pre-construction energy assessments.
{"title":"Sensitivity of Sub-Hourly Modeling Error to Project Size","authors":"Christopher Hayes, A. Parikh, Mark Mikofski, Rounak Kharait","doi":"10.1109/pvsc48317.2022.9938848","DOIUrl":"https://doi.org/10.1109/pvsc48317.2022.9938848","url":null,"abstract":"High-frequency measurements of solar resource from the Surface Radiation Budget Network (SURFRAD) from stations in NV, MT, SD, MS, PA, IL and CO were down-sampled from 1-minute to 1-hour and used to predict energy yield and sub-hourly modeling error. A Wavelet Variability Model (WVM) incorporating an estimated solar plant layout was used to determine the sub-hourly modeling error dependency for projects ranging in size from 1 MW to 1,000 MW. Additionally, sensitivity to inverter overbuild, DC to AC ratio, average cloud speed, interannual variability and geographic location were evaluated. By incorporating the WVM to smooth the irradiance inputs we found that annual sub-hourly modeling errors exhibited a nearly logarithmic decrease as project size increased. On average, the modeling error decreases quickly for the first 200 MW and begins to asymptote for 200 - 1,000 MW. The magnitude of annual modeling errors was highly influenced by DC/AC ratio, average cloud speed and the interannual variability of the solar resource. The results of this study were implemented to develop a project size dependent sub-hourly modeling error adjustment factor for pre-construction energy assessments.","PeriodicalId":435386,"journal":{"name":"2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127891463","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 : 2022-06-05DOI: 10.1109/PVSC48317.2022.9938923
Luyao Yuan, A. Anctil
Most life cycle assessment (LCA) of crystalline silicon photovoltaics (c-Si PV) modules are based on public life cycle inventory (LCI) datasets with limited use of actual manufacturing data. We collect and calculate the amount of material used for production of different PV modules installed in the U.S. to analyze the trend in material intensity over and compare the numbers among various tier manufacturers and module reliability. Furthermore, results of LCA models using the public LCI data and the actual manufacturing material (specifically aluminum) data are compared to investigate the impact of material use on the life-cycle impact assessment of c-Si PV modules. Results show a trend of material use decrease over time and indicate a potential connection between material usage and the manufacturer tier – better manufacturers tend to use more materials for modules production which may lead to higher quality performance. Additional work will complete the life cycle assessment, explore more materials, and fill the data gap of PV modules produced by different manufacturer tiers in different years.
{"title":"Material Use and Life Cycle Impact of Crystalline Silicon PV Modules Over Time","authors":"Luyao Yuan, A. Anctil","doi":"10.1109/PVSC48317.2022.9938923","DOIUrl":"https://doi.org/10.1109/PVSC48317.2022.9938923","url":null,"abstract":"Most life cycle assessment (LCA) of crystalline silicon photovoltaics (c-Si PV) modules are based on public life cycle inventory (LCI) datasets with limited use of actual manufacturing data. We collect and calculate the amount of material used for production of different PV modules installed in the U.S. to analyze the trend in material intensity over and compare the numbers among various tier manufacturers and module reliability. Furthermore, results of LCA models using the public LCI data and the actual manufacturing material (specifically aluminum) data are compared to investigate the impact of material use on the life-cycle impact assessment of c-Si PV modules. Results show a trend of material use decrease over time and indicate a potential connection between material usage and the manufacturer tier – better manufacturers tend to use more materials for modules production which may lead to higher quality performance. Additional work will complete the life cycle assessment, explore more materials, and fill the data gap of PV modules produced by different manufacturer tiers in different years.","PeriodicalId":435386,"journal":{"name":"2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)","volume":" 18","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131942776","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 : 2022-06-05DOI: 10.1109/pvsc48317.2022.9938735
Christian M. Wolff, X. Chin, Deniz Turkay, Kerem Artuk, Mohammad Reza Golobostanfard, Florent Sahli, Daniel A. Jacobs, Quentin Guesnay, Peter Fiala, M. Othman, B. Sharma, Brett A. Kamino, A. Hessler-Wyser, M. Boccard, Q. Jeangros, C. Ballif
Beyond the limitations of single-junction solar cells, multi-junction devices offer the possibility to harness the sun’ light more efficiently. In particular perovskite-on-silicon (Pk/Si) tandems hold the great promise of high efficiencies >30 % while maintaining low cost. We report on our latest progress in the development of Pk/Si tandems comparing our efforts on single-side and double-side textured Pk/Si tandems, reaching a VOC up to 1.95 V, summed short-circuit current densities above 41 mA/cm2, and certified efficiencies >29 %, on an active area of 1cm2. We achieved these results by dedicated electrical and optical optimizations of all layers within the stack. Specifically, we improved the transparency of the front stack electrodes and contacts through simulation-guided optimizations of the front grid and layer thicknesses, and reduced recombination and transport losses in the Pk absorbers through process and additive engineering for both solution-processed one-step and hybrid two-step deposited Pks. Furthermore, we investigated the stability of single-junction Pk and tandem devices under reverse-bias and standardized accelerated aging conditions.
{"title":"Highly Efficient Perovskite-on-Silicon Tandem Solar Cells on Planar and Textured Silicon","authors":"Christian M. Wolff, X. Chin, Deniz Turkay, Kerem Artuk, Mohammad Reza Golobostanfard, Florent Sahli, Daniel A. Jacobs, Quentin Guesnay, Peter Fiala, M. Othman, B. Sharma, Brett A. Kamino, A. Hessler-Wyser, M. Boccard, Q. Jeangros, C. Ballif","doi":"10.1109/pvsc48317.2022.9938735","DOIUrl":"https://doi.org/10.1109/pvsc48317.2022.9938735","url":null,"abstract":"Beyond the limitations of single-junction solar cells, multi-junction devices offer the possibility to harness the sun’ light more efficiently. In particular perovskite-on-silicon (Pk/Si) tandems hold the great promise of high efficiencies >30 % while maintaining low cost. We report on our latest progress in the development of Pk/Si tandems comparing our efforts on single-side and double-side textured Pk/Si tandems, reaching a VOC up to 1.95 V, summed short-circuit current densities above 41 mA/cm2, and certified efficiencies >29 %, on an active area of 1cm2. We achieved these results by dedicated electrical and optical optimizations of all layers within the stack. Specifically, we improved the transparency of the front stack electrodes and contacts through simulation-guided optimizations of the front grid and layer thicknesses, and reduced recombination and transport losses in the Pk absorbers through process and additive engineering for both solution-processed one-step and hybrid two-step deposited Pks. Furthermore, we investigated the stability of single-junction Pk and tandem devices under reverse-bias and standardized accelerated aging conditions.","PeriodicalId":435386,"journal":{"name":"2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130015748","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 : 2022-06-05DOI: 10.1109/PVSC48317.2022.9938814
Deewakar Poudel, Adam Masters, Benjamin Belfore, Elizabeth Palmiotti, A. Rockett, S. Marsillac
Copper Indium diselenide (CIS) semiconductor thin films were deposited by single-stage process. Following the deposition, annealing and recrystallization of CIS was carried out in the presence of InCl3 at different temperatures. Increase in grain size was observed by SEM in all cases. Increase in peak intensity was observed by XRD after treatment, correlating well with the SEM results. Measurements of the composition by both XRF and EDS indicate significant changes, notably a decrease in copper content. This will likely be an issue for device performance and will need to be addressed.
{"title":"Impact of Indium Chloride Treatment on the Properties of CuInSe2 Thin Films","authors":"Deewakar Poudel, Adam Masters, Benjamin Belfore, Elizabeth Palmiotti, A. Rockett, S. Marsillac","doi":"10.1109/PVSC48317.2022.9938814","DOIUrl":"https://doi.org/10.1109/PVSC48317.2022.9938814","url":null,"abstract":"Copper Indium diselenide (CIS) semiconductor thin films were deposited by single-stage process. Following the deposition, annealing and recrystallization of CIS was carried out in the presence of InCl3 at different temperatures. Increase in grain size was observed by SEM in all cases. Increase in peak intensity was observed by XRD after treatment, correlating well with the SEM results. Measurements of the composition by both XRF and EDS indicate significant changes, notably a decrease in copper content. This will likely be an issue for device performance and will need to be addressed.","PeriodicalId":435386,"journal":{"name":"2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130069853","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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