Design of input couplers for efficient silicon thin film solar absorbers
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Sun-Kyung | - |
dc.contributor.author | Song, Kyung-Deok | - |
dc.contributor.author | Park, Hong-Gyu | - |
dc.date.accessioned | 2021-09-06T13:23:55Z | - |
dc.date.available | 2021-09-06T13:23:55Z | - |
dc.date.created | 2021-06-14 | - |
dc.date.issued | 2012-11-05 | - |
dc.identifier.issn | 1094-4087 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/106956 | - |
dc.description.abstract | We investigated light absorption in various Si thin film solar absorbers and designed efficient input couplers using finite-difference time-domain simulation. In the simulation, a dielectric coating on Si thin film led to enhanced light absorption at near-ultraviolet to blue wavelengths, while the absorption peaks at longer wavelengths were nearly preserved. In a 300-nm-thick Si film with a 60-nm-thick Si3N4 top-coated layer, current density was augmented by similar to 35% compared to a bare Si film. For broadband absorption, we introduced two-dimensional square-lattice periodic patterns consisting of low-index dielectric materials, SiO2 or Si3N4, or high-index material, Si. The periodic pattern exhibited tunable and pronounced absorption peaks that are indentified as horizontally-propagating waveguide modes. The high absorption peaks were significantly amplified with increasing refractive index of the dielectric pattern. For a Si-patterned structure with a pitch size of 400 nm and a pattern depth of 80 nm, current density was achieved up to 17.0 mA/cm(2), which is enhanced by a factor of 2.1 compared to the current density of bare Si film. Deep understanding of the light absorption in optical cavities with wavelength-scale thickness will be useful in the design of efficient thin film solar absorbers as well as novel nanophotonic elements. (C) 2012 Optical Society of America | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | OPTICAL SOC AMER | - |
dc.subject | ABSORPTION | - |
dc.title | Design of input couplers for efficient silicon thin film solar absorbers | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Park, Hong-Gyu | - |
dc.identifier.doi | 10.1364/OE.20.00A997 | - |
dc.identifier.scopusid | 2-s2.0-84869016212 | - |
dc.identifier.wosid | 000311340300024 | - |
dc.identifier.bibliographicCitation | OPTICS EXPRESS, v.20, no.23, pp.A997 - A1004 | - |
dc.relation.isPartOf | OPTICS EXPRESS | - |
dc.citation.title | OPTICS EXPRESS | - |
dc.citation.volume | 20 | - |
dc.citation.number | 23 | - |
dc.citation.startPage | A997 | - |
dc.citation.endPage | A1004 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Optics | - |
dc.relation.journalWebOfScienceCategory | Optics | - |
dc.subject.keywordPlus | ABSORPTION | - |
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