Kyoungah Cho
고려대학교 공과대학 기계공학과 · 공학
Kyoungah Cho 교수의 연구실은 유연하고 경량화된 열전 소재 및 장치의 개발에 초점을 맞추고 있으며, 나노결정체, 실리콘 나노와이어, MXene 계열 편성막을 활용한 고성능 열전 발전소를 연구합니다. 특히 열전 성능을 극대화하기 위해 열전도를 저감하면서도 전도성은 유지하는 신소재 설계와, 유연성과 내구성을 확보한 스케일러블 열전 모듈 기반의 에너지 수확 기술을 개발하고 있습니다. 최근에는 머신러닝을 활용한 하이브리드 에너지 장치의 성능 예측 및 최적화에도 진전을 이루고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Abstract This paper demonstrates that thermal energy radiated from a human finger can be converted efficiently into electricity by a nanocrystal (NC) thin film that substantially suppresses thermal conduction, but still allows electric conduction. The converting efficiencies of the chalcogenide NC thin films with dimensions 40 µm × 20 µm × 20 nm, prepared on flexible substrates by a solution process, are maximized by adjusting the NC size. A Seebeck coefficient of S = 1829 µV K −1 , and a dimens
This study demonstrates the fabrication and characterization of a flexible thermoelectric (TE) power generator composed of silicon nanowires (SiNWs) fabricated by top‐down method and discusses its strain‐dependence analysis. The Seebeck coefficients of the p‐ and n‐type SiNWs used to form a pn‐module are 156.4 and −146.1 µV K −1 , respectively. The maximum power factors of the p‐ and n‐type SiNWs are obtained as 8.79 and 8.87 mW (m K 2 ) −1 , respectively, under a convex bending of 1.11%, respec
In this study, we used machine learning to predict the output power of hybrid energy devices (HEDs) comprising photovoltaic cells (PVCs) and thermoelectric generators (TEGs). For the five types of HEDs, eight different machine learning models were trained and tested with experimental data; the HED each had different interface materials between the PVCs and the TEGs. An artificial neural network (ANN) model, which is the most appropriate model, predicted the correlation between HED performance an
Abstract In this study, the thermoelectric characteristics of spin‐coated p‐Mo 2 C and n‐Mo 2 Ti 2 C 3 thin films and the scalability of MXene thin‐film thermoelectric generators (TFTEGs) constructed with pn modules are investigated. The in‐plane thermal conductivities are measured at room temperature to be 0.37 and 0.45 W (m K) −1 for the p‐Mo 2 C and n‐Mo 2 Ti 2 C 3 thin films, respectively. The dimensionless figures of merit ZT are determined to be 1.7 × 10 −5 and 2.6 × 10 −4 for the p‐Mo 2 C
