title: Hierarchical structures consisting of SiO2 nanorods and p-GaN microdomes for efficiently harvesting solar energy for InGaN quantum well photovoltaic cells.
abstract: We experimentally and theoretically demonstrated the hierarchical structure of SiO(2) 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.
authors.affiliation: Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan, ROC.
authors.forename: Cheng-Han
authors.initials: CH
authors.lastname: Ho
authors.forename: Der-Hsien
authors.initials: DH
authors.lastname: Lien
authors.forename: Hung-Chih
authors.initials: HC
authors.lastname: Chang
authors.forename: Chin-An
authors.initials: CA
authors.lastname: Lin
authors.forename: Chen-Fang
authors.initials: CF
authors.lastname: Kang
authors.forename: Meng-Kai
authors.initials: MK
authors.lastname: Hsing
authors.forename: Kun-Yu
authors.initials: KY
authors.lastname: Lai
authors.forename: Jr-Hau
authors.initials: JH
authors.lastname: He
mesh_terms: D005708:Gallium / Q000737:chemistry*; D007204:Indium / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry*; D017672:Nitrogen Compounds / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D012993:Solar Energy; D013499:Surface Properties
chemical_list: D017672:Nitrogen Compounds; D007204:Indium; D012822:Silicon Dioxide; D005708:Gallium; C027235:gallium nitrate