Korea University · Engineering
Professor Donghwan Kim's research lab specializes in advanced energy materials, with a primary focus on perovskite-based optoelectronic devices and electrocatalysts for sustainable energy applications. The lab investigates high-efficiency perovskite solar cells, including tandem architectures and large-area module development, aiming to bridge the gap between laboratory-scale performance and industrial scalability. Additionally, the lab explores nanostructured catalysts—particularly NiO-decorated silicon nanowires with carbon coatings—for enhanced electrocatalytic activity in water splitting and related energy conversion processes. Their work emphasizes material design, interface engineering, and performance optimization for practical renewable energy solutions.
Figures are computed from collected data and may differ slightly.
Organic-inorganic hybrid perovskite solar cells (PSCs) have been extensively studied because of their outstanding performance: a power conversion efficiency exceeding 22% has been achieved. The most commonly used PSCs consist of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> (MAPbI<sub>3</sub>) with a hole-selective contact, such as 2,2',7,7'-tetrakis(N,N-di-p-methoxyphenylamine)-9,9-spiro-bifluorene (spiro-OMeTAD), for collecting holes. From the perspective of long-term operation of solar cells, t
The status and problems of upscaling research on perovskite solar cells, which must be addressed for commercialization efforts to be successful, are investigated. An 804 cm<sup>2</sup> perovskite solar module has been reported with 17.9% efficiency, which is significantly lower than the champion perovskite solar cell efficiency of 25.2% reported for a 0.09 cm<sup>2</sup> aperture area. For the realization of upscaling high-quality perovskite solar cells, the upscaling and development history of
Perovskite-based tandem solar cells are promising candidates for industrial applications. This study demonstrated perovskite/silicon tandem devices based on a conventional Si homojunction device configuration employing a tunnel oxide passivating contact to improve the voltage. Moreover, we fabricated it without the deposition of a recombination layer on a large area while showing the possibility of applying the industry market. This solar cell exhibited a power conversion efficiency of 17.3% and
To improve the catalytic activity of a material, it is critical to maximize the effective surface area by directly contacting the electrolyte. Nanowires are a promising building block for catalysts in electrochemical applications because of their large surface area. Nickel oxide (NiO) decoration was achieved by drop-casting a nickel-dissolved solution onto vertically aligned silicon nanowire arrays with a carbon shell (SiNW/C). Based on the hybridization of the NiO and silicon nanowire arrays wi
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