A single-material graded refractive index layer for improving the efficiency of III–V triple-junction solar cells
| Autor: | Young Min Song, Chan Il Yeo, Yong Tak Lee, Hee Ju Choi, Seokjin Kang |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment business.industry Triple junction Energy conversion efficiency General Chemistry Titanium oxide law.invention Arc (geometry) Optics law Solar cell Optoelectronics General Materials Science business Layer (electronics) Refractive index Deposition (law) |
| Zdroj: | Journal of Materials Chemistry A. 3:7235-7240 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/c4ta06111j |
| Popis: | We present a single-material titanium oxide (TiO2) bi-layer antireflection coating (ARC) produced using oblique angle deposition for improving the power conversion efficiency (PCE) of III–V compound semiconductor triple-junction (TJ) solar cells. Experimental demonstration of the porous TiO2 layers and optical modelling by rigorous coupled-wave analysis indicate that bi-layer TiO2 could be used as universal ARC for all known TJ stacks with various material combinations. The optimum TiO2 bi-layer ARC produced on a Ga0.5In0.5P/GaAs/Ge TJ solar cell exhibits considerably enhanced PCE of 31.6%, which is higher than that of the cells without ARC (23.8%) and with TiO2 single-layer ARC (29.1%). Incident angle-dependent device characteristics of the fabricated TJ solar cells are also discussed. |
| Databáze: | OpenAIRE |
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