HOME Research Insight Quantum Dots acute focus on the future markets



Quantum Dots acute focus on the future markets


Electronics and semiconductor industry is always in search of versatile and easily deployable next generation technology, which can improve quality and reliability, at a reduced cost. The operation with regards to various tailored application specific platforms, for implementing a robust technology, is expected to seamlessly take the competition to the next level. The success factor of a technology depends on the quality, feasibility, and flexibility it offers, along with its accuracy in real-time. This results in the better market positioning with respect to the commercialization of product lines.

The tested technologies that have been catering, predominantly, to the requirements of the display industries are none other than “Liquid Crystal Displays (LCDs)”, commonly known as LCDs; and “Light Emitting Diodes (LED)”,commonly known as LEDs; and (backlit) LCDs and OLEDs. These particular technologies have been experiencing many dynamic end user demands and, at the same time, threats from different emerging solutions; but have always been able to position themselves, well, with regards to the two critical aspects— low cost and durability; unless it is challenged by the new emerging technologies with respect to ‘quantum dots’.

The contender, Quantum dots (QD) are tiny particles, better known as “nanoparticles” of a semiconductor material, traditionally, ‘chalcogenides (selenides or sulfides)’ of metals like cadmium or zinc (CdSe or ZnS), which range from 2 to 10 nanometers in diameter (about the width of 50 atoms).

Quantum Dots have fluorescence effect, which occurs when the excited electron moves from the conduction band to its valence band, emitting a photon with a longer wavelength than the one absorbed (electron–hole recombination process). The energy difference between the absorption and emission spectra is known as the “Stokes shift”. Generally, the smaller the crystal size, the larger is the band gap. Therefore, the electron will require more energy to become excited, and in turn, will emit light with a higher energy while returning to a lower energy state. The color and emission wavelength of a QD are determined by its size and composition. QDs can emit light at wavelengths ranging from the ultraviolet (UV) to the infrared (IR).

Another dimension of QuantumDots would be to undergo the phenomenon known as “Forster Resonance Energy Transfer (FRET)”, which is of popular utility in the development of biosensors and detection assays. FRET is the nonradioactive transfer of energy from a donor molecule to an acceptor molecule through near-field dipole–dipole interaction. In addition, to overlap between the emission spectrum of the donor and the absorbance range of the acceptor, a typical distance of 2–8 nm (known as the Forster distance) between the donor and acceptor is needed; thus, resulting in the energy transfer. The “Forster distance” is defined as the distance between the donor and acceptor, at which the energy transfer efficiency is 50%. The advantages of using QDs as energy donors in FRET-based assays include their strong emission and multiplexing ability as well as the option to choose the QDs with the emission wavelength most suited for the available acceptor.

Related Reports:

Quantum Dots Market by Product (QD Displays, Lasers, Medical Devices, Solar Cells, Chip, Sensor), Application (Healthcare, Optoelectronics, Sustainable Energy), Material (Cadmium Selenide, Sulfide, Telluride), and Geography - Forecast & Analysis (2013 – 2020)

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