D
Dongkyu Cha
Researcher at Saudi Aramco
Publications - 99
Citations - 7624
Dongkyu Cha is an academic researcher from Saudi Aramco. The author has contributed to research in topics: Nanoparticle & Thin film. The author has an hindex of 34, co-authored 97 publications receiving 6781 citations. Previous affiliations of Dongkyu Cha include University of Texas at Dallas & King Abdullah University of Science and Technology.
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Journal ArticleDOI
Colloidal-quantum-dot photovoltaics using atomic-ligand passivation
Jiang Tang,Kyle W. Kemp,Sjoerd Hoogland,Kwangseob Jeong,Huan Liu,Huan Liu,Larissa Levina,Melissa Furukawa,Xihua Wang,Ratan Debnath,Dongkyu Cha,Kang Wei Chou,Armin Fischer,Aram Amassian,John B. Asbury,Edward H. Sargent +15 more
TL;DR: An atomic ligand strategy is established that makes use of monovalent halide anions to enhance electronic transport and successfully passivate surface defects in PbS CQD films that shows up to 6% solar AM1.5G power-conversion efficiency.
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Substrate dependent self-organization of mesoporous cobalt oxide nanowires with remarkable pseudocapacitance.
TL;DR: Both electrode designs exhibited excellent cycling stability by retaining ∼91-94% of their maximum capacitance after 5000 cycles of continuous charge-discharge, thereby reducing device resistance and nanoporosity with large surface area to allow faster reaction kinetics.
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High‐Surface‐Area Silica Nanospheres (KCC‐1) with a Fibrous Morphology
TL;DR: In quest of nanocatalysis by surface organometallic chemistry (SOMC), herein it is presented the synthesis of fibrous silica nanospheres (KCC-1) with high surface areas, which is to the best of the authors' knowledge, silica Nanospheres with this type of Fibrous morphology is unprecedented.
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Vertically aligned Ta3N5 nanorod arrays for solar-driven photoelectrochemical water splitting.
Yanbo Li,Tsuyoshi Takata,Dongkyu Cha,Kazuhiro Takanabe,Tsutomu Minegishi,Jun Kubota,Kazunari Domen +6 more
TL;DR: A vertically aligned Ta(3)N(5) nanorod photoelectrode is fabricated by through-mask anodization and nitridation for water splitting to yield a high photocurrent density and one of the highest activities reported for photoanodes so far.
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Cobalt phosphate-modified barium-doped tantalum nitride nanorod photoanode with 1.5% solar energy conversion efficiency
Yanbo Li,Li Zhang,Almudena Torres-Pardo,José M. González-Calbet,Yanhang Ma,Peter Oleynikov,Osamu Terasaki,Osamu Terasaki,Shunsuke Asahina,Masahide Shima,Dongkyu Cha,Lan Zhao,Kazuhiro Takanabe,Jun Kubota,Kazunari Domen +14 more
TL;DR: An efficient and stable photoanode is reported that couples an active barium-doped tantalum nitride nanostructure with a stable cobalt phosphate co-catalyst and yields a maximum solar energy conversion efficiency more than three times higher than that of state-of-the-art single-photon photoanodes.