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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Pasanen, Toni P.
Helsinki Institute of Physics
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2023Surface passivation of Germanium with ALD Al2O3: Impact of Composition and Crystallinity of GeOx Interlayercitations
- 2023Excellent Responsivity and Low Dark Current Obtained with Metal-Assisted Chemical Etched Si Photodiodecitations
- 2023Comparison of SiNx-based Surface Passivation Between Germanium and Siliconcitations
- 2023Plasma-enhanced atomic layer deposited SiO2 enables positive thin film charge and surface recombination velocity of 1.3 cm/s on germaniumcitations
- 2023Quantifying the Impact of Al Deposition Method on Underlying Al2O3/Si Interface Qualitycitations
- 2022Perspectives on Black Silicon in Semiconductor Manufacturing: Experimental Comparison of Plasma Etching, MACE and Fs-Laser Etchingcitations
- 2022Millisecond-Level Minority Carrier Lifetime in Femtosecond Laser-Textured Black Siliconcitations
- 2022(oral talk) Compatibility of Al-neal in processing of Si devices with Al2O3 layer
- 2022Impact of doping and silicon substrate resistivity on the blistering of atomic-layer-deposited aluminium oxidecitations
- 2021Efficient photon capture on germanium surfaces using industrially feasible nanostructure formationcitations
- 2021Al-neal Degrades Al2O3 Passivation of Silicon Surfacecitations
- 2020Modeling Field-effect in Black Silicon and its Impact on Device Performancecitations
- 2020Passivation of Detector-Grade Float Zone Silicon with Atomic Layer Deposited Aluminum Oxidecitations
- 2020Impact of doping and silicon substrate resistivity on the blistering of atomic-layer-deposited aluminium oxidecitations
- 2019Effect of MACE Parameters on Electrical and Optical Properties of ALD Passivated Black Siliconcitations
- 2019Compatibility of 3-D Printed Devices in Cleanroom Environments for Semiconductor Processingcitations
- 2019Compatibility of 3-D Printed Devices in Cleanroom Environments for Semiconductor Processingcitations
- 2019Passivation of Detector‐Grade FZ‐Si with ALD‐Grown Aluminium Oxidecitations
- 2018Economic Advantages of Dry-Etched Black Silicon in Passivated Emitter Rear Cell (PERC) Photovoltaic Manufacturingcitations
- 2018Economic Advantages of Dry-Etched Black Silicon in Passivated Emitter Rear Cell (PERC) Photovoltaic Manufacturingcitations
- 2017Surface passivation of black silicon phosphorus emitters with atomic layer deposited SiO2/Al2O3 stackscitations
Places of action
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article
Plasma-enhanced atomic layer deposited SiO2 enables positive thin film charge and surface recombination velocity of 1.3 cm/s on germanium
Abstract
The excellent field-effect passivation provided by aluminum oxide (Al2O3) on germanium surfaces relies on the high negative fixed charge present in the film. However, in many applications, a neutral or a positive charge would be preferred. Here, we investigate the surface passivation performance and the charge polarity of plasma-enhanced atomic layer deposited (PEALD) silicon oxide (SiO2) on Ge. The results show that even a 3 nm thick PEALD SiO2 provides a positive charge density (Qtot, ∼2.6 × 1011 cm−2) and a relatively good surface passivation (maximum surface recombination velocity SRVmax ∼16 cm/s). When the SiO2 thin film is capped with an ALD Al2O3 layer, the surface passivation improves further and a low midgap interface defect density (Dit) of ∼1 × 1011 eV−1 cm−2 is achieved. By varying the SiO2 thickness under the Al2O3 capping, it is possible to control the Qtot from virtually neutral (∼2.8 × 1010 cm−2) to moderately positive (∼8.5 × 1011 cm−2) values. Consequently, an excellent SRVmax as low as 1.3 cm/s is obtained using optimized SiO2/Al2O3 layer thicknesses. Finally, the origin of the positive charge as well as the interface defects related to PEALD SiO2 are discussed. © 2023 Author(s).