Werner, F.; Cosceev, A.; Schmidt, J.: Silicon surface passivation by Al2O3: Recombination parameters and inversion layer solar cells. In: Energy Procedia 27 (2012), S. 319-324. DOI: https://doi.org/10.1016/j.egypro.2012.07.070
Zusammenfassung: | |
The interface between p- and n-type FZ-Si and an amorphous aluminum oxide (Al2O3) surface passivation layer deposited by plasma-assisted atomic layer deposition (ALD) was investigated by frequency-dependent conductance measurements. The hole capture cross section in the lower half of the bandgap, σp = (4±3)×10 -16 cm2, was found to be independent of energy. The electron capture cross section σn in the upper half of the bandgap decreases from σn = (7±4)×10-15 cm2 at midgap over two orders of magnitude towards the conduction band edge. Numerical simulations of the effective surface recombination velocity based on these recombination parameters show a good agreement with experimental surface recombination velocities for a wide range of excess carrier and surface charge densities. Carrier transport in the inversion layer formed at the n-Si/Al2O3 interface was investigated yielding a sheet resistance of 15 kΩ/, which was reduced to 6 kΩ/ for a surface charge density of -2×1013 cm-2 obtained by corona charging. The applicability of Al2O3 inversion layers as emitters in n-type inversion layer solar cells was demonstrated by short circuit current densities of up to 25 mA/cm2, which show a pronounced dependence on surface charge density. | |
Lizenzbestimmungen: | CC BY-NC-ND 3.0 Unported |
Publikationstyp: | Article |
Publikationsstatus: | publishedVersion |
Erstveröffentlichung: | 2012 |
Die Publikation erscheint in Sammlung(en): | Fakultät für Elektrotechnik und Informatik |
Pos. | Land | Downloads | ||
---|---|---|---|---|
Anzahl | Proz. | |||
1 | Germany | 114 | 62,64% | |
2 | United States | 21 | 11,54% | |
3 | China | 11 | 6,04% | |
4 | Korea, Republic of | 7 | 3,85% | |
5 | No geo information available | 5 | 2,75% | |
6 | Taiwan | 4 | 2,20% | |
7 | Ukraine | 2 | 1,10% | |
8 | Hungary | 2 | 1,10% | |
9 | France | 1 | 0,55% | |
10 | Egypt | 1 | 0,55% | |
andere | 14 | 7,69% |
Hinweis
Zur Erhebung der Downloadstatistiken kommen entsprechend dem „COUNTER Code of Practice for e-Resources“ international anerkannte Regeln und Normen zur Anwendung. COUNTER ist eine internationale Non-Profit-Organisation, in der Bibliotheksverbände, Datenbankanbieter und Verlage gemeinsam an Standards zur Erhebung, Speicherung und Verarbeitung von Nutzungsdaten elektronischer Ressourcen arbeiten, welche so Objektivität und Vergleichbarkeit gewährleisten sollen. Es werden hierbei ausschließlich Zugriffe auf die entsprechenden Volltexte ausgewertet, keine Aufrufe der Website an sich.