http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Polymeric micro-capsules for a stable storage of quantum dot (QD) : QD-microcapsules
서영수 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
QD has been known as a promising material for the next generation display and illumination technology due to its excellent luminescent properties such as narrow emission band and high efficiency comparable to OLED. Until now, however, its application as industrial products is still limited because it is easily degraded under oxidative environments such as atmospheric oxygen, heat, and moisture. Here we developed a polymeric microcapsule where QD is well-dispersed in between self-assembled, 2-dimensionally stacked (multi-larmellar), micron-sized polymeric crystals, which is referred as a QD-microcapsule. it has been applied to QD-film and QD-LED and we found long-term stability of QD has been improved tested at high temperature, high humidity, and under the blue light. Its morphology was studied by SEM, TEM, WASX, and SAXS. Stability of QD was checked in terms of photoluminescence (PL) intensity, emission wavelength, and FWHM in the PL spectrum.
Seungmin Baek,YONGJINKIM,Sang-Wook Kim 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.83 No.-
Highly photo-stable CsPbI3 perovskite quantum dots (PeQDs) were prepared using thiol as an exchangedligand. Among the CsPbX3 PeQDs, CsPbI3 with common capping ligands such as oleic acid (OA) andoleylamine (OLA) was particularly unstable and the optical properties were readily degraded because ofits structural instability. To overcome these problems, thiol ( SH) as an exchanged ligand was used tostabilize the structure and could maintain the structural and optical properties. The synthesized CsPbI3exhibited highly improved photo-stability under ultraviolet (365 nm) irradiation by ligand exchangefrom OA and OLA to thiol. As an application, perovskitefilms were fabricated using the PeQDs and a cyclicolefin copolymer (COC). The thiol-treated PeQDfilms exhibited higher stability than the untreatedfilmsunder irradiation with a blue light-emitting diode (LED).