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- W2150320210 abstract "To place β-FeSi2 as a 3rd generation Kankyo (Environmentally Friendly) Semiconductor after GaAs, one should demonstrate its superior features by fabricating practical devices. One has to prepare high-quality β-FeSi2 films with (1) precisely controlled Fe/Si ratio (1:2), (2) flat and cracks-free surface, (3) pinhole-free surface and interfaces, (4) flat interfaces, (5) well-controlled electron or hole concentration with residual carrier concentration as low as ∼10 16 cm−3. One should accordingly explore novel thin film manufacturing technologies by considering specific properties of constituent Fe and Si atoms. Conventional growth methods used for III–V and II–VI compound semiconductor films are not suited for β-FeSi2. Here we summarize the current status of film preparation technologies and describe their advantages and drawbacks. To explore the possibility of β-FeSi2 for low cost and high conversion efficiency solar cells, high quality β-FeSi2 films have been formed on Si substrates by molecular beam epitaxy (MBE) and sputtering methods. The critical feature about the device structure is an optimized thin β-FeSi2 template buffer layer on Si(111) substrate. The template served as a substrate for epitaxial growth of single crystal β-FeSi2 film and restrains the Fe diffusion into Si at β-FeSi2/Si interface. For n-β-FeSi2/p-Si structure under air mass 1.5, an energy conversion efficiency of 3.7% was obtained, showing that β-FeSi2 is practically a promising semiconductor for making solar cells." @default.
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- W2150320210 date "2004-08-01" @default.
- W2150320210 modified "2023-09-27" @default.
- W2150320210 title "Important research targets to be explored for β-FeSi2 device making" @default.
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- W2150320210 doi "https://doi.org/10.1016/j.tsf.2004.02.073" @default.
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