Conference proceeding
A Systematic Investigation of Aluminum Oxide Passivating Tunnel Layers for Titanium Oxide Electron-Selective Contacts
2020 47th IEEE Photovoltaic Specialists Conference (PVSC), v 2020-, pp 1557-1561
14 Jun 2020
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The effects of different processing conditions on aluminum oxide passivating interlayers for silicon/titanium oxide contacts have been investigated. Surface recombination velocity (SRV) and specific contact resistivity are reported as a function of Al 2 O 3 thickness, substrate termination, and thermal treatment. It was observed that Al 2 O 3 passivated most effectively on hydrogen-terminated substrates, achieving an SRV of 20 cm·s −1 (down from 100 cm·s −1 when wafers were only coated with TiO 2 ) and contact resistivity 0.02\ \mathrm{\Omega}\cdot \text{cm}^{2} . After thermal treatment, however, a contact with a chemical oxide-terminated substrate and without Al 2 O 3 exhibited the lowest recombination with a measured SRV of 40 cm·s −1 and contact resistivity below 0.01\ \mathrm{\Omega}\cdot \text{cm}^{2} . Additionally, only annealed contacts without Al 2 O 3 exhibited ohmic characteristics. The data reported in the present work demonstrate the benefits of certain passivation schemes over others and may aid in the design of future solar cells.
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Details
- Title
- A Systematic Investigation of Aluminum Oxide Passivating Tunnel Layers for Titanium Oxide Electron-Selective Contacts
- Creators
- Benjamin E. Davis - Lehigh UniversityNicholas C. Strandwitz - Lehigh University
- Publication Details
- 2020 47th IEEE Photovoltaic Specialists Conference (PVSC), v 2020-, pp 1557-1561
- Publisher
- IEEE
- Grant note
- Office of Energy Efficiency and Renewable (EERE) (10.13039/100006134) U.S. Department of Energy's (10.13039/100000015)
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- A.J. Drexel Nanomaterials Institute
- Web of Science ID
- WOS:000653077100372
- Scopus ID
- 2-s2.0-85099551858
- Other Identifier
- 991021881401104721
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- Web of Science research areas
- Energy & Fuels
- Engineering, Electrical & Electronic