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A widespread practical application is using quantum dot enhancement film (QDEF) layer to improve the LED backlighting in LCD TVs.Light from a blue LED backlight is converted by QDs to relatively pure red and green, so that this combination of blue, green and red light incurs less blue-green crosstalk and light absorption in the color filters after the LCD screen, thereby increasing useful ...
Samsung Display enabled the first mass-production of OLED and quantum dot displays and aims to develop next-generation technology such as slidable, rollable and stretchable panels. The company was established as S-LCD Corporation in April 2004 in Chungcheongnam-do as a joint venture between Samsung Electronics (51% share) and Sony Corporation ...
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In the case of a semiconducting quantum dot, this process corresponds to the transition of an electron from the valence band to the conduction band. The excited electron can drop back into the valence band releasing its energy as light. This light emission (photoluminescence) is illustrated in the figure on the right.
Quantum dots (QDs) are nano-scale semiconductor particles on the order of 2–10 nm in diameter. They possess electrical properties between those of bulk semi-conductors and individual molecules, as well as optical characteristics that make them suitable for applications where fluorescence is desirable, such as medical imaging.
The core and the shell are typically composed of type II–VI, IV–VI, I-III-VI, and III–V semiconductors, with configurations such as CdS/ZnS, CdSe/ZnS, CuInZnSe/ZnS, CdSe/CdS, and InAs/CdSe (typical notation is: core/shell) [2] Organically passivated quantum dots have low fluorescence quantum yield due to surface related trap states. [3]
Samsung SDI was one of the main investors in the technology, and many other display companies were also developing it. One of the earliest consumer electronics products with an AMOLED display was the BenQ-Siemens S88 mobile handset [ 8 ] and, in 2007, the iriver Clix 2 portable media player. [ 9 ]
Silicon quantum dots are metal-free biologically compatible quantum dots with photoluminescence emission maxima that are tunable through the visible to near-infrared spectral regions. These quantum dots have unique properties arising from their indirect band gap , including long-lived luminescent excited-states and large Stokes shifts .