Effective passivation of Si surfaces by plasma deposited SiOx/a-SiNx:H stacks

被引:66
作者
Dingemans, G. [1 ]
Mandoc, M. M. [1 ]
Bordihn, S. [2 ]
van de Sanden, M. C. M. [1 ]
Kessels, W. M. M. [1 ]
机构
[1] Eindhoven Univ Technol, Dept Appl Phys, NL-5600 MB Eindhoven, Netherlands
[2] Q Cells SE, D-06766 Bitterfeld, Germany
关键词
SILICON SOLAR-CELLS; NITRIDE FILMS; RECOMBINATION; CHARGE; LAYERS; AL2O3;
D O I
10.1063/1.3595940
中图分类号
O59 [应用物理学];
学科分类号
摘要
Very low surface recombination velocities <6 and <11 cm/s were obtained for SiOx/a-SiNx:H stacks synthesized by plasma-enhanced chemical vapor deposition on low resistivity n- and p-type c-Si, respectively. The stacks induced a constant effective lifetime under low illumination, comparable to Al2O3 on p-type Si. Compared to single layer a-SiNx:H, a lower positive fixed charge density was revealed by second-harmonic generation measurements, while field-effect passivation was absent for a reference stack comprising thermally grown SiO2. The results indicate that hydrogenation of interface states played a key role in the passivation and remained effective up to annealing temperatures >800 degrees C. (C)2011 American Institute of Physics. [doi: 10.1063/1.3595940]
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页数:3
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