title: Characteristics of Carrier Collection of Nanopillar-Patterned Silicon Solar Cells.
abstract: Nanopillar-patterned Si solar cells were investigated. Ag nanoparticles were coated on a polished Si substrate as an etching mask. Reactive ion etching caused Si nanopillars to replicate in a reverse fashion on the Ag nanoparticles over a large area. The nanopillar structures efficiently reduced the light reflection on the surface and effectively drove the incident light into a Si absorber. This induced a significant enhancement of the photogenerated-current with an improved solar cell efficiency of 16.07%. The Si nanopillar-patterned solar cells showed improved carrier collection for long wavelengths; however, the surface-defect induced recombination degraded the quantum efficiency at short wavelengths. We suggest that the reduction of recombination loss should be considered for efficient nanostructure solar cells.
authors.forename: Joondong
authors.initials: J
authors.lastname: Kim
authors.forename: Seong-Je
authors.initials: SJ
authors.lastname: Park
authors.forename: Minkyu
authors.initials: M
authors.lastname: Ju
authors.forename: Chaehwan
authors.initials: C
authors.lastname: Jeong