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Next-generation illumination using silicon quantum dot-based white-blue LED

Date:
June 5, 2015
Source:
Hiroshima University
Summary:
An Si quantum dot (QD)-based hybrid inorganic/organic light-emitting diode (LED) that exhibits white-blue electroluminescence has been fabricated researchers. A hybrid LED is expected to be a next-generation illumination device for producing flexible lighting and display, and this is achieved for the Si QD-based white-blue LED.
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Professor Ken-ichi Saitow, Natural Science Center for Basic Research and Development, Hiroshima University and Graduate student Yunzi Xin, Graduate School of Science, Hiroshima University, have fabricated an Si QD hybrid LED.
Credit: Natural Science Center for Basic Research and Development, Hiroshima University

A Si quantum dot (QD)-based hybrid inorganic/organic light-emitting diode (LED) that exhibits white-blue electroluminescence has been fabricated by Professor Ken-ichi SAITOW (Natural Science Center for Basic Research and Development, Hiroshima University), Graduate student Yunzi XIN (Graduate School of Science, Hiroshima University), and their collaborators. A hybrid LED is expected to be a next-generation illumination device for producing flexible lighting and display, and this is achieved for the Si QD-based white-blue LED. For details, refer to "White-blue electroluminescence from a Si quantum dot hybrid light-emitting diode," in Applied Physics Letters.

The Si QD hybrid LED was developed using a simple method; almost all processes were solution-based and conducted at ambient temperature and pressure. Conductive polymer solutions and a colloidal Si QD solution were deposited on the glass substrate. The current and optical power densities of the LED are, respectively, 280 and 350 times greater than those reported previously for such a device at the same voltage (6 V). In addition, the active area of the LED is 4 mm2, which is 40 times larger than that of a typical commercial LED; the thickness of the LED is 0.5 mm.

Professor Saitow stated, "QD LED has attracted significant attention as a next-generation LED. Although several breakthroughs will be required for achieving implementation, a QD-based hybrid LED allows us to give so fruitful feature that we cannot imagine."


Story Source:

Materials provided by Hiroshima University. Note: Content may be edited for style and length.


Journal Reference:

  1. Yunzi Xin, Kazuyuki Nishio, Ken-ichi Saitow. White-blue electroluminescence from a Si quantum dot hybrid light-emitting diode. Applied Physics Letters, 2015; 106 (20): 201102 DOI: 10.1063/1.4921415

Cite This Page:

Hiroshima University. "Next-generation illumination using silicon quantum dot-based white-blue LED." ScienceDaily. ScienceDaily, 5 June 2015. <www.sciencedaily.com/releases/2015/06/150605102956.htm>.
Hiroshima University. (2015, June 5). Next-generation illumination using silicon quantum dot-based white-blue LED. ScienceDaily. Retrieved May 24, 2017 from www.sciencedaily.com/releases/2015/06/150605102956.htm
Hiroshima University. "Next-generation illumination using silicon quantum dot-based white-blue LED." ScienceDaily. www.sciencedaily.com/releases/2015/06/150605102956.htm (accessed May 24, 2017).

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