{"title":"Performance of State-of-the-Art CdTe-Based Solar Cells: What Has Changed?","authors":"Ishwor Khatri;Camden Kasik;James R. Sites","doi":"10.1109/JPHOTOV.2024.3422651","DOIUrl":null,"url":null,"abstract":"The open-circuit voltage (\n<italic>V</i>\n<sub>OC</sub>\n) of polycrystalline state-of-the-art, arsenic-doped CdSeTe/CdTe solar cells has reached 917 mV, and the record cell efficiency has been gradually increasing. However, there is a significant difference in performance between the current CdTe-based solar cells and single-crystal GaAs cells that have a comparable band gap. The largest contribution to this difference in performance is the voltage. Between 1993 and 2023, \n<italic>V</i>\n<sub>OC</sub>\n of CdTe-based solar cells improved by ∼143 mV when an appropriate adjustment was made for the band gap. This value is still about ∼180 mV below the best GaAs cells. The potential for even higher CdTe efficiencies will likely require a combination of incorporation of front-contact improvements, optimization of thickness, selenium profile, doping, and grain-boundary passivation of the absorber, better passivation of the rear interface, and assurance of back-contact conductivity and band alignment.","PeriodicalId":445,"journal":{"name":"IEEE Journal of Photovoltaics","volume":null,"pages":null},"PeriodicalIF":2.5000,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Journal of Photovoltaics","FirstCategoryId":"5","ListUrlMain":"https://ieeexplore.ieee.org/document/10599357/","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
The open-circuit voltage (
V
OC
) of polycrystalline state-of-the-art, arsenic-doped CdSeTe/CdTe solar cells has reached 917 mV, and the record cell efficiency has been gradually increasing. However, there is a significant difference in performance between the current CdTe-based solar cells and single-crystal GaAs cells that have a comparable band gap. The largest contribution to this difference in performance is the voltage. Between 1993 and 2023,
V
OC
of CdTe-based solar cells improved by ∼143 mV when an appropriate adjustment was made for the band gap. This value is still about ∼180 mV below the best GaAs cells. The potential for even higher CdTe efficiencies will likely require a combination of incorporation of front-contact improvements, optimization of thickness, selenium profile, doping, and grain-boundary passivation of the absorber, better passivation of the rear interface, and assurance of back-contact conductivity and band alignment.
期刊介绍：
The IEEE Journal of Photovoltaics is a peer-reviewed, archival publication reporting original and significant research results that advance the field of photovoltaics (PV). The PV field is diverse in its science base ranging from semiconductor and PV device physics to optics and the materials sciences. The journal publishes articles that connect this science base to PV science and technology. The intent is to publish original research results that are of primary interest to the photovoltaic specialist. The scope of the IEEE J. Photovoltaics incorporates: fundamentals and new concepts of PV conversion, including those based on nanostructured materials, low-dimensional physics, multiple charge generation, up/down converters, thermophotovoltaics, hot-carrier effects, plasmonics, metamorphic materials, luminescent concentrators, and rectennas; Si-based PV, including new cell designs, crystalline and non-crystalline Si, passivation, characterization and Si crystal growth; polycrystalline, amorphous and crystalline thin-film solar cell materials, including PV structures and solar cells based on II-VI, chalcopyrite, Si and other thin film absorbers; III-V PV materials, heterostructures, multijunction devices and concentrator PV; optics for light trapping, reflection control and concentration; organic PV including polymer, hybrid and dye sensitized solar cells; space PV including cell materials and PV devices, defects and reliability, environmental effects and protective materials; PV modeling and characterization methods; and other aspects of PV, including modules, power conditioning, inverters, balance-of-systems components, monitoring, analyses and simulations, and supporting PV module standards and measurements. Tutorial and review papers on these subjects are also published and occasionally special issues are published to treat particular areas in more depth and breadth.
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