성균관대학교 · Materials Science
다혜 후 교수의 연구실은 나노소재 기반의 에너지 저장 장치 및 광전기 소자에 초점을 맞추고 있습니다. 그래핀 유도체, 도핑된 탄소 소재, 페로브스카이트 양자점, 그리고 이온 전도성 고체 등 다양한 나노구조 재료를 설계하여 초고용량 슈퍼커퍼시터와 효율적인 LED 소자 구현에 기여하고 있습니다. 특히, 전기화학적 성능을 극대화하기 위한 표면 결함 제어 및 다성분 도핑 전략이 핵심 연구 전략입니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
The effect of the doping configuration and concentration of nitrogen (N) and sulfur (S) on the electrochemical performance of 3 D N and S co-doped hole defect graphene hydrogel (NS-HGH) electrodes is investigated. Surprisingly, by introducing a hole defect on the graphene surface, the difference in the doping concentrations of N and S can be used to effectively modulate the electrochemical behavior of the NS-HGH. The hole defects provide a rapid ion diffusion path. Finally, we showed that the in
Potassium lithium niobate ( K 3 Li 2- X Nb 5+ X O 15+2 X : KLN) crystals are difficult to grow by conventional crystal growth methods because of the distinct change of composition. Using the micro pulling down ( µ-PD) method, crack-free and homogeneous KLN crystals with a length of 150 mm and diameters of 150, 300 and 500 µm have been grown successfully. The crystals show good structural quality, single-domain structure and an excellent second harmonic generation property. The red irradiation of
Nickel cobalt sulfide nanoparticles embedded in holey defect graphene hydrogel (HGH) that exhibit highly porous structures and uniform nickel cobalt sulfide nanoparticle sizes are successfully prepared by a facile solvothermal-hydrothermal method. As an electrode material for supercapacitors, the as-prepared NiCo<sub>2</sub> S<sub>4</sub> @HGH shows ultra-high specific capacitances of 1000 F g<sup>-1</sup> and 800 F g<sup>-1</sup> at 0.5 and 6 A g<sup>-1</sup> , respectively, owing to the outsta
We report highly efficient ethyl cellulose with CsPbBr<sub>3</sub> perovskite QD films for white light generation in LED application. Ethyl cellulose with CsPbBr<sub>3</sub> quantum dots is applied with Sr<sub>2</sub>Si<sub>5</sub>N<sub>8</sub> : Eu<sup>2+</sup> red phosphor on an InGaN blue chip, achieving a highly efficient luminous efficacy of 67.93 lm W<sup>-1</sup> under 20 mA current.
PSS coating layer can suppress the undesirable side reactions between the carbon and electrolyte (and/or Li2O2), which causes enhanced Li-air cell cyclic performance.
