Pub Date : 2025-07-02DOI: 10.1109/JPHOTOV.2025.3581709
Mohamed Limam El Hairach;Amal Tmiri;Insaf Bellamine;Tony Mellors;Hassan Silkan
The optimal functioning of large-scale photovoltaic installations relies on effective monitoring of tracking systems. This research presents a straightforward and effective method for monitoring performance by finding flaws that lead to energy losses. The Tracker Status Index is an effective instrument specifically engineered to assess tracker anomalies in real time. The proposed method, in conjunction with an interactive visualization tool, enables operators to swiftly identify malfunctioning trackers and assess their impact on plant performance. The approach is easily integrable into existing monitoring systems due to its clear calculation formulas and operating parameters. Validation through an authentic case study demonstrates the reliability of the Tracker Status Index in correlating tracker failures with energy loss, hence underscoring its use as a decision-support instrument for improving operational efficiency and maximizing energy production in photovoltaic systems.
{"title":"Integrated Methodology for Solar Tracker Performance Assessment and Energy Loss Quantification","authors":"Mohamed Limam El Hairach;Amal Tmiri;Insaf Bellamine;Tony Mellors;Hassan Silkan","doi":"10.1109/JPHOTOV.2025.3581709","DOIUrl":"https://doi.org/10.1109/JPHOTOV.2025.3581709","url":null,"abstract":"The optimal functioning of large-scale photovoltaic installations relies on effective monitoring of tracking systems. This research presents a straightforward and effective method for monitoring performance by finding flaws that lead to energy losses. The Tracker Status Index is an effective instrument specifically engineered to assess tracker anomalies in real time. The proposed method, in conjunction with an interactive visualization tool, enables operators to swiftly identify malfunctioning trackers and assess their impact on plant performance. The approach is easily integrable into existing monitoring systems due to its clear calculation formulas and operating parameters. Validation through an authentic case study demonstrates the reliability of the Tracker Status Index in correlating tracker failures with energy loss, hence underscoring its use as a decision-support instrument for improving operational efficiency and maximizing energy production in photovoltaic systems.","PeriodicalId":445,"journal":{"name":"IEEE Journal of Photovoltaics","volume":"15 5","pages":"712-721"},"PeriodicalIF":2.6,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144887741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This work investigates the potential of nanocrystalline silicon carbide (nc-SiC) films as transparent passivating contacts for high-efficiency solar cells. A plasma-enhanced chemical vapor deposition process for high hydrogen radical density was developed to fabricate nc-SiC films. The influence of phosphorus (P) doping and thermal treatment on the structural, compositional, and electrical properties of these films was investigated. Increased doping reduced the contact resistance but also negatively affected the open circuit voltage ($iV_{text{oc}}$). We identified a set of parameters that provided a compromise between conductivity and passivation, resulting in a maximum $iV_{text{oc}}$ of 708 mV on textured surfaces with a contact resistance of around 100 $mathrm{m}mathrm{Omega }mathrm{c}mathrm{m}^{2},$. In addition, nc-SiC exhibited superior ultraviolet transparency compared to poly silicon (poly-Si) and crystalline silicon (c-Si), with an absorption coefficient of $3times 10^{5}; text{cm}^{-1}$ at 350 nm, lower than the typical $1times 10^{6}; text{cm}^{-1}$ for poly-Si and c-Si.
{"title":"nc-SiC by PECVD for High-Temperature Passivating Contacts","authors":"Ezgi Genc;Julien Hurni;Arnold Müller;Christof Vockenhuber;Takashi Koida;Audrey Morisset;Christophe Ballif;Franz-Josef Haug","doi":"10.1109/JPHOTOV.2025.3577294","DOIUrl":"https://doi.org/10.1109/JPHOTOV.2025.3577294","url":null,"abstract":"This work investigates the potential of nanocrystalline silicon carbide (nc-SiC) films as transparent passivating contacts for high-efficiency solar cells. A plasma-enhanced chemical vapor deposition process for high hydrogen radical density was developed to fabricate nc-SiC films. The influence of phosphorus (P) doping and thermal treatment on the structural, compositional, and electrical properties of these films was investigated. Increased doping reduced the contact resistance but also negatively affected the open circuit voltage (<inline-formula><tex-math>$iV_{text{oc}}$</tex-math></inline-formula>). We identified a set of parameters that provided a compromise between conductivity and passivation, resulting in a maximum <inline-formula><tex-math>$iV_{text{oc}}$</tex-math></inline-formula> of 708 mV on textured surfaces with a contact resistance of around 100 <inline-formula><tex-math>$mathrm{m}mathrm{Omega }mathrm{c}mathrm{m}^{2},$</tex-math></inline-formula>. In addition, nc-SiC exhibited superior ultraviolet transparency compared to poly silicon (poly-Si) and crystalline silicon (c-Si), with an absorption coefficient of <inline-formula><tex-math>$3times 10^{5}; text{cm}^{-1}$</tex-math></inline-formula> at 350 nm, lower than the typical <inline-formula><tex-math>$1times 10^{6}; text{cm}^{-1}$</tex-math></inline-formula> for poly-Si and c-Si.","PeriodicalId":445,"journal":{"name":"IEEE Journal of Photovoltaics","volume":"15 5","pages":"630-638"},"PeriodicalIF":2.6,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144887707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-06-20DOI: 10.1109/JPHOTOV.2025.3576533
{"title":"Call for Papers for a Special Issue of IEEE Transactions on Electron Devices on “Reliability of Advanced Nodes”","authors":"","doi":"10.1109/JPHOTOV.2025.3576533","DOIUrl":"https://doi.org/10.1109/JPHOTOV.2025.3576533","url":null,"abstract":"","PeriodicalId":445,"journal":{"name":"IEEE Journal of Photovoltaics","volume":"15 4","pages":"626-627"},"PeriodicalIF":2.5,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11045341","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-06-20DOI: 10.1109/JPHOTOV.2025.3576614
{"title":"IEEE Journal of Photovoltaics Information for Authors","authors":"","doi":"10.1109/JPHOTOV.2025.3576614","DOIUrl":"https://doi.org/10.1109/JPHOTOV.2025.3576614","url":null,"abstract":"","PeriodicalId":445,"journal":{"name":"IEEE Journal of Photovoltaics","volume":"15 4","pages":"C3-C3"},"PeriodicalIF":2.5,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11045374","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-06-20DOI: 10.1109/JPHOTOV.2025.3576528
{"title":"Call for Papers for a Special Issue of IEEE Transactions on Electron Devices on “Wide Band Semiconductors for Automotive Application","authors":"","doi":"10.1109/JPHOTOV.2025.3576528","DOIUrl":"https://doi.org/10.1109/JPHOTOV.2025.3576528","url":null,"abstract":"","PeriodicalId":445,"journal":{"name":"IEEE Journal of Photovoltaics","volume":"15 4","pages":"621-622"},"PeriodicalIF":2.5,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11045373","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-06-20DOI: 10.1109/JPHOTOV.2025.3576532
{"title":"Call for Papers for a Special Issue of IEEE Transactions on Electron Devices on “Ultrawide Band Gap Semiconductor Device for RF, Power and Optoelectronic Application","authors":"","doi":"10.1109/JPHOTOV.2025.3576532","DOIUrl":"https://doi.org/10.1109/JPHOTOV.2025.3576532","url":null,"abstract":"","PeriodicalId":445,"journal":{"name":"IEEE Journal of Photovoltaics","volume":"15 4","pages":"624-625"},"PeriodicalIF":2.5,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11045362","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-06-20DOI: 10.1109/JPHOTOV.2025.3576530
{"title":"Announcing an IEEE/Optica Publishing Group Journal of Lightwave Technology Special Issue","authors":"","doi":"10.1109/JPHOTOV.2025.3576530","DOIUrl":"https://doi.org/10.1109/JPHOTOV.2025.3576530","url":null,"abstract":"","PeriodicalId":445,"journal":{"name":"IEEE Journal of Photovoltaics","volume":"15 4","pages":"623-623"},"PeriodicalIF":2.5,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11045363","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-06-20DOI: 10.1109/JPHOTOV.2025.3577361
Yasuhiko Takeda;Ken-ichi Yamanaka;Naohiko Kato
We designed multijunction solar modules for installation on building walls, in which all the submodules are composed of organic–inorganic hybrid perovskite solar cells, adopting the monolithically series-interconnected structures. Prior to considering concrete module configurations, we elucidated that the impacts of temporal and regional variations in the solar spectra on the vertically wall-installed modules are more notable than those on the modules installed on rooftops and in solar farms at the optimal tilt angles. As a result, the annually averaged conversion efficiencies for the double-junction (2J) modules of the conventional two-terminal configuration and other configurations that require the current matching between the top and bottom modules are notably degraded. By contrast, the voltage-matched (VM) 2J modules, in which the submodules yielding approximately the same maximal-power voltages (VMP) are connected in parallel, ensure high conversion efficiencies close to those for the four-terminal (4T) 2J modules even when wall installed because VMP is less sensitive to solar-spectrum variation than the photocurrents. The single output of the VM 2J modules is practically a great advantage over the dual output of the 4T 2J modules. An improved variant: the series–parallel-connecting VM triple-junction modules, in which the two-terminal middle/bottom modules are parallel connected with the top modules, further improve the conversion efficiencies under all the installation conditions.
{"title":"Voltage-Matched All-Perovskite Double- and Triple-Junction Solar Modules for Building-Integrated Photovoltaics","authors":"Yasuhiko Takeda;Ken-ichi Yamanaka;Naohiko Kato","doi":"10.1109/JPHOTOV.2025.3577361","DOIUrl":"https://doi.org/10.1109/JPHOTOV.2025.3577361","url":null,"abstract":"We designed multijunction solar modules for installation on building walls, in which all the submodules are composed of organic–inorganic hybrid perovskite solar cells, adopting the monolithically series-interconnected structures. Prior to considering concrete module configurations, we elucidated that the impacts of temporal and regional variations in the solar spectra on the vertically wall-installed modules are more notable than those on the modules installed on rooftops and in solar farms at the optimal tilt angles. As a result, the annually averaged conversion efficiencies for the double-junction (2J) modules of the conventional two-terminal configuration and other configurations that require the current matching between the top and bottom modules are notably degraded. By contrast, the voltage-matched (VM) 2J modules, in which the submodules yielding approximately the same maximal-power voltages (<italic>V</i><sub>MP</sub>) are connected in parallel, ensure high conversion efficiencies close to those for the four-terminal (4T) 2J modules even when wall installed because <italic>V</i><sub>MP</sub> is less sensitive to solar-spectrum variation than the photocurrents. The single output of the VM 2J modules is practically a great advantage over the dual output of the 4T 2J modules. An improved variant: the series–parallel-connecting VM triple-junction modules, in which the two-terminal middle/bottom modules are parallel connected with the top modules, further improve the conversion efficiencies under all the installation conditions.","PeriodicalId":445,"journal":{"name":"IEEE Journal of Photovoltaics","volume":"15 5","pages":"672-685"},"PeriodicalIF":2.6,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144887738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-06-13DOI: 10.1109/JPHOTOV.2025.3575469
Michael G. Deceglie;Timothy J Silverman;Byron McDanold;Kevin Anderson;Daniel Riley;Bruce H. King;Joshua S. Stein;Laura T. Schelhas
We present outdoor observations of metal-halide perovskite modules deployed in the Photovoltaic Accelerator for Commercializing Technologies center, which houses one of the world's broadest efforts to test metal-halide perovskite photovoltaic modules outdoors. As of January 2025, outdoor testing has encompassed over 150 modules from 14 different partners. Our findings illustrate how daily changes in efficiency, driven by exposure to light, affect field performance in real-world conditions. These effects cannot be explained by existing outdoor performance models and frustrate the notion of a traditional temperature coefficient.
{"title":"Intraday Outdoor Efficiency Changes in Metal-Halide Perovskite Photovoltaic Modules","authors":"Michael G. Deceglie;Timothy J Silverman;Byron McDanold;Kevin Anderson;Daniel Riley;Bruce H. King;Joshua S. Stein;Laura T. Schelhas","doi":"10.1109/JPHOTOV.2025.3575469","DOIUrl":"https://doi.org/10.1109/JPHOTOV.2025.3575469","url":null,"abstract":"We present outdoor observations of metal-halide perovskite modules deployed in the Photovoltaic Accelerator for Commercializing Technologies center, which houses one of the world's broadest efforts to test metal-halide perovskite photovoltaic modules outdoors. As of January 2025, outdoor testing has encompassed over 150 modules from 14 different partners. Our findings illustrate how daily changes in efficiency, driven by exposure to light, affect field performance in real-world conditions. These effects cannot be explained by existing outdoor performance models and frustrate the notion of a traditional temperature coefficient.","PeriodicalId":445,"journal":{"name":"IEEE Journal of Photovoltaics","volume":"15 5","pages":"652-656"},"PeriodicalIF":2.6,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144887710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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