Hierarchical structures consisting of SiO2 nanorods and p-GaN microdomes for efficiently harvesting solar energy for InGaN quantum well photovoltaic cells

Cheng Han Ho, Der Hsien Lien, Hung Chih Chang, Chin An Lin, Chen Fang Kang, Meng Kai Hsing, Kun Yu Lai, Jr Hau He*

*Corresponding author for this work

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

We experimentally and theoretically demonstrated the hierarchical structure of SiO2 nanorod arrays/p-GaN microdomes as a light harvesting scheme for InGaN-based multiple quantum well solar cells. The combination of nano- and micro-structures leads to increased internal multiple reflection and provides an intermediate refractive index between air and GaN. Cells with the hierarchical structure exhibit improved short-circuit current densities and fill factors, rendering a 1.47 fold efficiency enhancement as compared to planar cells.

Original languageEnglish
Pages (from-to)7346-7349
Number of pages4
JournalNanoscale
Volume4
Issue number23
DOIs
StatePublished - 7 Dec 2012

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