Improvement of a-Si solar cell properties by using SnO2:F TCO films coated with an ultra-thin TiO2 layer prepared by APCVD
| Autor: | Naoki Taneda, Mika Kambe, Makoto Fukawa, Kazuo Sato |
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| Rok vydání: | 2006 |
| Předmět: |
Anatase
Renewable Energy Sustainability and the Environment business.industry Chemistry Open-circuit voltage Energy conversion efficiency Crystal structure Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Optics law Solar cell Optoelectronics business Layer (electronics) Refractive index Transparent conducting film |
| Zdroj: | Solar Energy Materials and Solar Cells. 90:3014-3020 |
| ISSN: | 0927-0248 |
| Popis: | TiO 2 -overcoated SnO 2 :F transparent conductive oxide films were prepared by atmospheric pressure chemical vapor deposition (APCVD) and an effect of TiO 2 layer thickness on a-Si solar cell properties was investigated. The optical properties and the structure of the TiO 2 films were evaluated by spectroscopic ellipsometry and X-ray difractometry. a-Si thin film solar cells were fabricated on the SnO 2 :F films over-coated with TiO 2 films of various thicknesses (1.0, 1.5 and 2.0 nm) and I-V characteristics of these cells were measured under 1 sun (100 mW/cm 2 AM-1.5) illumination. It was found that the TiO 2 film deposited by APCVD has a refractive index of 2.4 at 550 nm and anatase crystal structure. The conversion efficiency of the a-Si solar cell fabricated on the 2.0 nm TiO 2 -overcoated SnO 2 :F film increased by 3%, which is mainly attributed to an increase in open circuit voltage (V oc ) of 30 mV. |
| Databáze: | OpenAIRE |
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