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https://hdl.handle.net/11147/2035
Title: | Minority carrier properties of microcrystalline silicon thin films grown by HW-CVD and VHF-PECVD techniques | Authors: | Okur, Salih Göktaş, Oktay Güneş, Mehmet Finger, Friedhelm Carius, Reinhard |
Keywords: | Diffusion length Microcrystalline silicon thin film Raman spectroscopy Steady state photocarrier grating technique Silicon |
Publisher: | National Institute of Optoelectronics | Source: | Okur, S., Göktaş, O., Güneş, M., Finger, F., and Carius, R. (2005). Minority carrier properties of microcrystalline silicon thin films grown by HW-CVD and VHF-PECVD techniques. Journal of Optoelectronics and Advanced Materials, 7(1), 491-494. | Abstract: | Opto-electronic properties of μc-Si:H films prepared by hot-wire/catalytic chemical vapor deposition (HWCVD) and very high frequency plasma enhanced chemical vapor deposition (VHF-PECVD) techniques with various silane concentrations (SC) have been investigated using Raman spectroscopy, the steady-state photocarrier grating technique (SSPG), and the steady-state photoconductivity (SSPC). A correlation between the minority carrier transport properties and the microstructure has been found, using the dependence of the diffusion length (Ld) on the SC and Raman intensity ratio (I c RS) representing crystalline volume fractions. I C RS changes from 0.22 to 0.77. Ld increases with increasing Ic RS. It peaks around 0.5 with a maximum value of 270 nm, then decreases. Similar dependences of Ld on I C RS were obtained for films prepared by both HWCVD and VHF-PECVD. However, the grating quality factor measured on highly crystalline HWCVD films is substantially smaller than that found for VHF-PECVD films, indicating a relatively higher surface roughness present in the highly crystalline HWCVD films. | URI: | http://hdl.handle.net/11147/2035 | ISSN: | 1454-4164 |
Appears in Collections: | Physics / Fizik Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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