• Bulletin of the Korean Chemical Society
• /
• 제25권6호
• /
• pp.934-936
• /
• 2004

• 한국자기공명학회논문지
• /
• 제23권2호
• /
• pp.51-55
• /
• 2019

Quantum dot (QD) is an emerging novel nanomaterial that has wide applicability and superior functionality with relatively low cost. Nuclear magnetic resonance (NMR) spectroscopy has been contributed to elucidate various features of QDs and to improve their overall performance. In particular, NMR spectroscopy becomes an essential analytical tool to monitor and analyze organic ligands on the QD surface. In the present mini-review, application of NMR spectroscopy as a superb methodology to appreciate organic ligands is discussed. In addition, it was recently noted that ligands exert rather greater influence on diverse features of QDs than our initial anticipation, for which contribution of NMR spectroscopy is briefly reviewed.

• 한국초전도학회:학술대회논문집
• /
• 한국초전도학회 2006년도 High Temperature Superconductivity Vol.XVI
• /
• pp.18-18
• /
• 2006

• 한국재료학회:학술대회논문집
• /
• 한국재료학회 1998년도 IUMRS-ICEM ABSTRACT BOOK
• /
• pp.80.4-80
• /
• 1998

• Current Applied Physics
• /
• 제18권11호
• /
• pp.1275-1279
• /
• 2018

We investigate the change of the Fano effect by considering one Majorana zero mode to couple laterally to the single-dot Fano interferometer. It is found that the Majorana zero mode quenches the Fano effect thoroughly and causes the conductance to be independent of the dot level, the dot-lead coupling, and the increase of the Majorana-dot coupling. As a result, the linear conductance becomes only related to the interlead coupling and the magnetic-flux phase factor. These results can be helpful for the detection of Majorana zero mode.

• 한국진공학회지
• /
• 제15권2호
• /
• pp.209-215
• /
• 2006

PL (photoluminescence), PLE (PL excitation) 그리고 근 적외선 투과 분광법을 활용하여 InAsGa/GaAs 우물 내 InAs 양자점 구조의 광학적 특성과 전자 버금 띠 구조에 대하여 연구하였다. 투과 스펙트럼과 PLE 스펙트럼으로부터 InAs 양자점 내 세 개의 구속 상태와 InGaAs/GaAs 우물 내에 두 개의 구속 상태가 존재함을 발견하였고, 광전류 스펙트럼에서 관측된 버금 띠 사이 전이들과 연관지어 해석하였다.

• 전기전자학회논문지
• /
• 제27권1호
• /
• pp.30-37
• /
• 2023

양자점 발광 다이오드(QD-LED)의 효율과 안정성 향상을 위해서 QD 발광층에 주입되는 전하의 균형을 이루는 것은 필수이다. 산화 아연(ZnO)은 최신 QD-LED에서 전자수송층(electron transport layer, ETL)을 구성하기 위해 가장 많이 사용되고 있으나, ZnO의 자발적인 전자 주입은 QD-LED의 성능을 크게 열화시키는 과도한 전자 주입을 유발한다. 본 연구에서는 자기조립단분자막(self-assembled monolayer, SAM) 처리를 통해 ZnO의 전자 주입 특성을 조절하여 QD-LED의 성능을 향상시켰다. 전하 균형도를 향상시킨 결과, SAM을 처리한 QD-LED는 SAM을 처리 안한 소자와 비교하여 내부 양자 효율(external quantum efficiency, EQE)이 25%, 최대 휘도는 200% 향상되었다.

• 인포메이션 디스플레이
• /
• 제18권1호
• /
• pp.27-31
• /
• 2017

• 광학과기술
• /
• 제6권3호
• /
• pp.7-11
• /
• 2002

• Bulletin of the Korean Chemical Society
• /
• 제28권6호
• /
• pp.953-958
• /
• 2007

Anchoring quantum dots (QDs) onto thermodynamically stable, large band gap oxide semiconductors is a very important strategy to enhance their quantum yields for solar energy conversion in both visible and near-IR regions. We describe a general procedure for anchoring a few chalcogenide QDs onto the titanium oxide layer. To anchor the colloidal QDs onto a mesoporous TiO2 layer, linker molecules containing both carboxylate and thiol functional groups were initially attached to TiO2 layers and subsequently used to capture dispersed QDs with the thiol group. Employing the procedure, we exploited cadmium selenide (CdSe) and cadmium telluride (CdTe) quantum dots (QDs) as inorganic sensitizers for a large band gap TiO2 layer of dye-sensitized solar cells (DSSCs). Their attachment was confirmed by naked eyes, absorption spectra, and photovoltaic effects. A few QD-TiO2 systems thus obtained have been characterized for photoelectrochemical solar energy conversion.