Concentrator In2O3:F/(n+pp+)c-Si/Al solar cells with Al-alloyed BSF and Ag-free multi-wire metallization using transparent conductive polymersстатья

Статья опубликована в высокорейтинговом журнале

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Дата последнего поиска статьи во внешних источниках: 4 января 2019 г.

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[1] Untila G. G., Kost T. N., Chebotareva A. B. Concentrator in2o3:f/(n+pp+)c-si/al solar cells with al-alloyed bsf and ag-free multi-wire metallization using transparent conductive polymers // Solar Energy. — 2018. — Vol. 174. — P. 1008–1015. Cost-effective low concentrator c-Si-based PV systems have been under development for more than 30 years without any significant commercial break-through. One primary reason for that is the cost and availability of Si cells for such applications. We have developed high efficiency low concentrator crystalline silicon (c-Si) solar cells using the standard SiNx/(n+pp+)c-Si/Al structures with a P-doped n+-emitter and screen-printed Al-alloyed Al-p+ back-surface-field (BSF). Ag-free multi-wire metallization has been applied using transparent conductive polymers. We have investigated seven groups of solar cell structures based on both Cz-Si and mc-Si and produced by the BSF formation processes with various peak firing temperatures (TF) in a conveyor belt furnace. TF was varied in the range of 820,940 oC in 20 oC steps. Surface morphology of the structures has been examined by scanning electron microscope. External quantum efficiency, reflection spectra, sheet resistance, Suns-Voc and current–voltage dependence under illumination have been studied. The structures obtained at TF=860 oC have been used for fabrication of low concentrator solar cells based on an indium fluorine oxide (IFO)/(n+pp+)c-Si/Al structure. Transparent conductive IFO films, acting as passivating and antireflection electrodes, were grown by ultrasonic spray pyrolysis. A copper wire contact pattern was attached by low-temperature lamination simultaneously to the front (IFO) and rear (Al) layers using transparent conductive polymer films (laminated grid cell (LGCell) design). The best LGCells from Cz-Si/mc-Si showed an efficiency of 18.3–19.2%/15.9–16.7% in the operating range of 1–12 suns/1–10 suns. [ DOI ]

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