https://scholars.lib.ntu.edu.tw/handle/123456789/358241
標題: | Thermal oxide, Al<inf>2</inf>O<inf>3</inf> and amorphous-Si passivation layers on silicon | 作者: | Ho, W.S. Chen, Y.-Y. Cheng, T.-H. Chen, J.-Y. Lu, J.-A. Huang, P.-L. Liu, C.W. CHEE-WEE LIU |
公開日期: | 2010 | 起(迄)頁: | 3163-3166 | 來源出版物: | IEEE Photovoltaic Specialists Conference | 摘要: | The effective passivation needs (1) higher bandgap than Si with type 1 alignment, (2) low interface density at the interface between passivation layer and Si, and (3) ionized charges for field effect passivation. The thermal oxide (SiO2) with low interface defect density seems most effective but requires high growth temperature (900 °C). Al2O3 with trapped negative fixed charges can serve as the field effect passivation. Moreover, doped amorphous Si can also have the field effect passivation with the controlled ionized charge density. The effective life time is measured by quasi-steady-state photoconductance (QSSPC). Photoluminescence (PL) measurement is consistent with QSSPC, and can probe a local area with mapping ability on large samples. The dependence of PL intensity on surface recombination velocity is theoretically studied. The passivation of a-Si becomes less effective after crystallization at high temperature annealing, indicating the larger bandgap is necessary. © 2010 IEEE. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-78650080350&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/358241 |
DOI: | 10.1109/PVSC.2010.5615938 | SDG/關鍵字: | Amorphous Si; Band gaps; Field effect passivation; High growth temperatures; High-temperature annealing; Interface defects; Interface density; Life-times; Negative fixed charge; Passivation layer; Photoluminescence measurements; PL intensity; Quasi-steady-state photoconductance; Surface recombination velocities; Thermal oxides; Amorphous silicon; Defect density; Energy gap; Ionization; Photovoltaic effects; Silicon compounds; Silicon oxides; Passivation |
顯示於: | 電機工程學系 |
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