12 October 2009 Bright and color-saturated quantum dot light-emitting diodes: new star for next generation displays and solid state lighting
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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.
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Zhanao Tan, Zhanao Tan, Jian Xu, Jian Xu, Ting Zhu, Ting Zhu, Andrew Y. Wang, Andrew Y. Wang, Qingjiang Sun, Qingjiang Sun, Yongfang Li, Yongfang Li, Yongping Yang, Yongping Yang, } "Bright and color-saturated quantum dot light-emitting diodes: new star for next generation displays and solid state lighting", 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; https://doi.org/10.1117/12.843089
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