InGaN photocell significant efficiency enhancement on Si – an influence of interlayer physical properties

Bablu K. Ghosh, and Saiful S. M. Zainal, and Khairul Anuar Mohamad, and Ismail Saad, (2016) InGaN photocell significant efficiency enhancement on Si – an influence of interlayer physical properties. International Journal of Energy Research, 40 (9). pp. 1271-1279. ISSN 1099-114X

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Nearly similar molar ratio of in and Ga in indium gallium nitride (InGaN) /Si photocells prefers to match InGaN conduction level energy to Si valance energy band for ohmic contact between two cells. At high temperature fabrication process, InGaN–Si interface shows highly defecting prone. Considering those tussles, InGaN-based/Si-based double-junction tandem solar cell was designed and fabricated. In₀.₄Ga₀.₆ N cell was fabricated on Si photocell by implementing AlN/SiO₂/Si₃N4 interlayers. Interlayer influence on quantum efficiency of InGaN cell was studied under ideal irradiance AM1.5 solar spectrum at 300°K. Because of insertion of interlayers between InGaN and Si; the gradual efficiency enhancement with respect to the overlayer h-GaN (a = 3.183 nm) plane lattice was found to 8.3%, 5.9% and 5.1% for AlN (a = 3.11 nm), for SiO₂ (a = 4.9 nm) and for Si₃N4 (a = 7.76 nm), respectively. AlN was found to be an excellent and SiO₂ as preferable interlayer compared with Si₃N4. Coherence (in-plane lattice matching) of nano-interlayer appears to reduce photonic electro-migration hurdle between InGaN and Si; therefore, progressive enrichment of efficiency was realized.

Item Type: Article
Uncontrolled Keywords: InGaN photocell, in-plane lattice, interlayer, significant, efficiency
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: FACULTY > Faculty of Engineering
Depositing User: Munira
Date Deposited: 03 Feb 2018 13:52
Last Modified: 03 Feb 2018 13:52

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