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Kwon, Tae-Hyuk
Energy Recognition
Research Interests
  • Energy transfer, organic solar cells, supercapacitor, ultrasonic spray chemistry, dithienothiophene, iridium complexes, phosphorescent bioapplications

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Phosphorescent Energy Downshifting for Diminishing Surface Recombination in Silicon Nanowire Solar Cells

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dc.contributor.author Kim, Hyun-Tak ko
dc.contributor.author Lee, Kangmin ko
dc.contributor.author Jin, Wonjoo ko
dc.contributor.author Um, Han-Don ko
dc.contributor.author Lee, Minsoo ko
dc.contributor.author Hwang, Eunhye ko
dc.contributor.author Kwon, Tae-Hyuk ko
dc.contributor.author Seo, Kwanyong ko
dc.date.available 2018-12-21T00:34:08Z -
dc.date.created 2018-12-06 ko
dc.date.issued 2018-11 ko
dc.identifier.citation SCIENTIFIC REPORTS, v.8, pp.16974 ko
dc.identifier.issn 2045-2322 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/25503 -
dc.description.abstract Molecularly engineered Ir(III) complexes can transfer energy from short-wavelength photons (lambda < 450 nm) to photons of longer wavelength (lambda > 500 nm), which can enhance the otherwise low internal quantum efficiency (IQE) of crystalline Si (c-Si) nanowire solar cells (NWSCs) in the shortwavelength region. Herein, we demonstrate a phosphorescent energy downshifting system using Ir(III) complexes at short wavelengths (300-450 nm) to diminish the severe surface recombination that occurs in c-Si NWSCs. The developed Ir(III) complexes can be considered promising energy converters because they exhibit superior intrinsic properties such as a high quantum yield, a large Stokes shift, a long exciton diffusion length in crystalline film, and a reproducible synthetic procedure. Using the developed 1011) complexes, highly crystalline energy downshifting layers were fabricated by ultrasonic spray deposition to enhance the photoluminescence efficiency by increasing the radiative decay. With the optimized energy downshifting layer, our 1cm(2) c-Si NWSCs with Ir(III) complexes exhibited a higher IQE value for short-wavelength light (300-450 nm) compared with that of bare Si NWSCs without Ir(III) complexes, resulting in a notable increase in the short-circuit current density (from 34.4 mA.cm(-2) to 36.5 mA.cm(-2) ). ko
dc.language 영어 ko
dc.publisher NATURE PUBLISHING GROUP ko
dc.title Phosphorescent Energy Downshifting for Diminishing Surface Recombination in Silicon Nanowire Solar Cells ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85056744628 ko
dc.identifier.wosid 000450411700005 ko
dc.type.rims ART ko
dc.identifier.doi 10.1038/s41598-018-35356-w ko
dc.identifier.url https://www.nature.com/articles/s41598-018-35356-w ko
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