Boron-doped silicon film as a recombination layer in the tunnel junction of a tandem solar cell
| Autor: | Zeng Xiang-Bo, Zhang Changsha, Wang Zhan-Guo, Xiao Hai-Bo, Liu Shiyong, Shi Mingji, Peng Wenbo |
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| Rok vydání: | 2009 |
| Předmět: |
inorganic chemicals
Amorphous silicon Materials science Silicon Doping technology industry and agriculture Nanocrystalline silicon Analytical chemistry chemistry.chemical_element Chemical vapor deposition Condensed Matter Physics complex mixtures Electronic Optical and Magnetic Materials Condensed Matter::Materials Science chemistry.chemical_compound chemistry Tunnel junction Plasma-enhanced chemical vapor deposition Condensed Matter::Superconductivity Materials Chemistry Electrical and Electronic Engineering Ohmic contact |
| Zdroj: | Journal of Semiconductors. 30:063001 |
| ISSN: | 1674-4926 |
| DOI: | 10.1088/1674-4926/30/6/063001 |
| Popis: | Boron-doped hydrogenated silicon films with different gaseous doping ratios (B2H6/SiH4) were deposited in a plasma-enhanced chemical vapor deposition (PECVD) system. The microstructure of the films was investigated by atomic force microscopy (AFM) and Raman scattering spectroscopy. The electrical properties of the films were characterized by their room temperature electrical conductivity (σ) and the activation energy (Ea). The results show that with an increasing gaseous doping ratio, the silicon films transfer from a microcrystalline to an amorphous phase, and corresponding changes in the electrical properties were observed. The thin boron-doped silicon layers were fabricated as recombination layers in tunnel junctions. The measurements of the I–V characteristics and the transparency spectra of the junctions indicate that the best gaseous doping ratio of the recombination layer is 0.04, and the film deposited under that condition is amorphous silicon with a small amount of crystallites embedded in it. The junction with such a recombination layer has a small resistance, a nearly ohmic contact, and a negligible optical absorption. |
| Databáze: | OpenAIRE |
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