| 학회 | 한국재료학회 |
| 학술대회 | 2015년 봄 (05/14 ~ 05/15, 구미코) |
| 권호 | 21권 1호 |
| 발표분야 | 제28회 신소재 심포지엄 - 콜로이드 양자점: 합성 및 응용 |
| 제목 | Design and fabrication of colloidal quantum dot light-emitting diodes |
| 초록 | Colloidal nanocrystal quantum dots (QDs) exhibit good optical properties, such as high photoluminescence (PL) quantum yields and narrow emission bandwidths (FWHM ＜30 nm). Also, it is easy to control the emission wavelength by changing the size of the QDs due to the quantum confinement effect. Thus, they have been used as a phosphor for biomarker and light emitters. Recently, by the virtue of highly saturated colors, QDs have been in spotlight for their application to display devices in two methods: One is to use the PL of QDs with a sheet containing red and green QDs, aka the quantum dot enhancement film (QDEF), which is placed on a blue-emitting backlight unit (BLU) of liquid crystal displays (LCDs). The other method is to use the electroluminescence (EL) of QDs by fabricating the light-emitting diodes (LEDs) with an emissive QD layer. These QD-based LEDs (QLEDs) have a similar structure and operation mechanism with organic light-emitting diodes (OLEDs). In addition, it is much easier to tune the emission color and to fabricate white-emitting devices. Thus, QLEDs are considered as the post-OLED display devices with thin, light and flexible properties. In this presentation, we will present our recent results on developing highly efficient QLEDs with both Cd-based and Cd-free QDs, and white QLEDs. Also, the device design strategy and fabrication process for solution-based QDs will be discussed. This work was supported by Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education (NRF-2011-0022716 and NRF-2014R1A1A2055322). |
| 저자 | 곽정훈1, 이창희2, 이성훈2, 차국헌2 |
| 소속 | 1동아대, 2서울대 |
| 키워드 | quantum dot; light-emitting diode; QLED |
