High-efficiency light-emitting devices based on quantum dots with tailored nanostructures
By Yixing Yang, Yingqi Zheng, Weiran Cao, A. Titov, J. Hyvonen, J. Manders, J. Xue, P. Holloway, L. Qian. Nature Photonics, 2013
958 citations recorded by the source corpus.
We report a full series of blue, green and red quantum-dot-based light-emitting devices (QD-LEDs), all with high external quantum efficiencies over 10%. We show that the fine nanostructure of quantum dots—especially the composition of the graded intermediate shell and the thickness of the outer shell—plays a very important role in determining QD-LED device performance due to its effects on charge injection, transport and recombination. These simple devices have maximum current and external quantum efficiencies of 63 cd A−1 and 14.5% for green QD-LEDs, 15 cd A−1 and 12.0% for red devices, and 4.4 cd A−1 and 10.7% for blue devices, all of which are well maintained over a wide range of luminances from 102 to 104 cd m−2. All the QD-LEDs are solution-processed for ease of mass production, and have low turn-on voltages and saturated pure colours. The green and red devices exhibit lifetimes of more than 90,000 and 300,000 h, respectively. Bright, efficient red, green and blue quantum-dot LEDs are realized by customizing the nanostructure of the quantum dots.
Subfields: Electrical and Electronic Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/0ba2a19da5fa690eef29bb9fc467d66a1e35109d
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.