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Proceedings Paper

Bright and color-saturated quantum dot light-emitting diodes: new star for next generation displays and solid state lighting
Author(s): Zhanao Tan; Jian Xu; Ting Zhu; Andrew Y. Wang; Qingjiang Sun; Yongfang Li; Yongping Yang
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Paper Abstract

The emergence of solution-processed semiconductor quantum dot (QD)-light emitting diodes (LEDs) has recently offered a great prospect for developing low-cost, efficient, bright, and large-area colorful displays compatible with flexible substrates. The band-edge electroluminescence (EL) of colloidal QDs of cadmium compounds, exhibits size-tunable spectral emission (450-760nm) and narrow bandwidth (FWHM~15-30nm), allowing for the design and fabrication of color-saturated red, green and blue (RGB) QD-LEDs with simple device configurations and high spectral purities that outperform those of liquid crystal displays and organic light-emitting diodes. Additionally, high fluorescence quantum yield and photochemical stability can be achieved by engineering the nanocrystal surfaces with wide-bandgap shells, which favors the efficiency and stability of QD-LEDs. We report in this conference of our recently developed red, orange, yellow, green, blue and white quantum dot light-emitting diodes with high brightness, high efficiency, saturated color on both indium tin oxides (ITO) coated glass and on flexible PET substrate.

Paper Details

Date Published: 12 October 2009
PDF: 12 pages
Proc. SPIE 7518, Photonics and Optoelectronics Meetings (POEM) 2009: Solar Cells, Solid State Lighting, and Information Display Technologies, 751803 (12 October 2009); doi: 10.1117/12.843089
Show Author Affiliations
Zhanao Tan, North China Electric Power Univ. (China)
Jian Xu, The Pennsylvania State Univ. (United States)
Ting Zhu, The Pennsylvania State Univ. (United States)
Andrew Y. Wang, Ocean Nano Tech LLC (United States)
Qingjiang Sun, Institute of Chemistry (China)
Yongfang Li, Institute of Chemistry (China)
Yongping Yang, North China Electric Power Univ. (China)

Published in SPIE Proceedings Vol. 7518:
Photonics and Optoelectronics Meetings (POEM) 2009: Solar Cells, Solid State Lighting, and Information Display Technologies
Michael Grätzel; Hiroshi Amano; Chin Hsin Chen; Changqing Chen; Peng Wang, Editor(s)

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