| 학회 | 한국재료학회 |
| 학술대회 | 2020년 가을 (11/18 ~ 11/20, 휘닉스 제주 섭지코지) |
| 권호 | 26권 1호 |
| 발표분야 | F. 광기능/디스플레이 재료 분과 |
| 제목 | High-Efficiency Green Quantum Dot Light Emitting Diode Enabled by Aromatic Carbon composited ZnO NPs as roles of electron transport layer (ETL) |
| 초록 | Colloidal quantum dots light emitting diodes (QDLEDs) have remarkably approached as an alternated emitting material with efficient performance. The main purpose for high performance of device is that how to optimize charge balance in the recombination region by controlling those materials, selecting charge injection/transport layer. In this paper, it will be shown that the device performance is enhanced by using modified ZnO NPs as electron injection/transport layer (EIL/ETL). Generally, the ZnO NPs synthesized by co-precipitation method have many defects site; Oxygen vacancy (VO), Zinc vacancy (VZn), Zinc interstitial (Zni), Oxygen interstitial (Oi), etc. These defects site reduce efficiency within the QDLEDs by trapping hole/electrons and impeding the movement of them. To overcome these shortcomings, ZnO NPs and aromatic carbons will be synthesized using the hydrothermal method to reduce the defects site of ZnO NPs. Also, it will check the synthesized product through surface analysis (measurements; XPS, XRD, Raman) and optical analysis (measurements; UV-Vis, PL, TRPL). Finally, QDLEDs will be fabricated by modified ZnO NPs as electron injection/transport layer. We will successfully improve maximum luminance and current efficiency value of Green-QDLED using modified ZnO NPs. |
| 저자 | Dayoung Lee, Hong Hee Kim, Dong Hee Park, Won Kook Choi |
| 소속 | Korea Institute of Science and Technology (KIST) |
| 키워드 | <P>QDLED; Quantum dot; ZnO; ETL; Green QD</P> |
