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R&D >> Optoelectronics

A. Display

Of particular interest in the display industry is mastering the QDLED technology for developing low-cost, long lifetime, ef­ficient, bright, color-saturated, and large-area color displays compatible with flexible substrates through solution-based processing. High expectations regarding this type of display result from the superior performance of QDLEDs in com­parison to conventional display devices, such as cathode-ray tubes (CRTs), liquid crystal displays (LCDs), and organic light-emitting-diodes (OLEDs). Ocean NanoTech is currently developing high quality QDs for this application through al­terations and improvements of the inorganic and organic coatings to capture a portion of this multi-billion dollar opportunity. With support from the NSF, NIH and DOD, as well as our academic partners, Ocean NanoTech has dem­onstrated the excellent electroluminescent efficiency of our high quality QD powders at electronic grade and delivered red, green, and blue QDLEDs to the market, which paves the way for revolutionary advances in the display industry. More detailed information about Ocean NanoTech’s QDLEDs and their device performance can be found in our publication at Nature Photonics, Nano Letters, APL and ACSnano.

 

Related Products: 

CdS/ZnS Core/Shell Quantum Dot Solid, Oleic Acid group functionalized (QZP)

CdSe/ZnS Quantum Dots Solid (QSP)

CdSSe/ZnS Quantum Dots Solid (QPP)

CdSe/ZnS Quantum Dots Solid (QSP-COMBO) 

 


 

B. Solid-state lighting

Solid-state lighting (SSL) uses light emitting diodes (LEDs), organic light emitting diodes (OLEDs), or polymer light emit­ting diodes (PLEDs) as sources of illumination rather than electrical filaments, plasma (used in arc lamps such as fluo­rescent lamps), or gas. Solid state refers to emission of light from a solid block of semiconductor rather than from a vacuum of gas tube as in the case of traditional incandes­cent light bulbs and fluorescent lamps. Unlike incandescent light, SSL creates visible light with reduced heat generation or parasitic energy dissipation, similar to that of fluorescent lighting. Its solid-state nature provides for greater resistance to shock, vibration, and wear, which increases its lifespan significantly. SSL is often used in modern vehicle lights, train marker lights, remote controls and traffic lights. Among the many potential applications of white LEDs, SSL has recently commanded much attention as a cost-competitive energy efficient alternative to conventional electrical lighting. QDs as SSL emitters offer high color tenability, high emission ef­ficiency and the possibility of mass production.

 

 

Related Products: 

CdS/ZnS Core/Shell Quantum Dot Solid, Oleic Acid group functionalized (QZP)

CdSe/ZnS Quantum Dots Solid (QSP)

CdSSe/ZnS Quantum Dots Solid (QPP)

CdSe/ZnS Quantum Dots Solid (QSP-COMBO)   

ZnCuInS/ZnS or CuInS/ZnS Quantum Dots in Solid Form (CSS)

 

 


 

C. Solar cells:

Colloidal QDs as photovoltaic materials have drawn more and more attention in solar cell research. The following unique properties of QDs make it possible to produce inex­pensive and high efficient solar cells on flexible substrate:

• Solution-based synthesis and process offers flexibility

in the selection of substrate and leads to lower manu­facturing cost of solar cells;

• Size dependent melting point makes it possible to

fabricate solar cells at low temperature with high crys­tallization to reduce the energy cost;

• Tunable band edge offers possibility to harvest light

over a wide range of wavelengths from visible to infra­red;

• Hot carrier injection from higher excited state can

minimize energy loss during thermalization of excited state for efficient light-electricity conversion;

• Multiple carrier generation leads to high efficient solar

cells;

• Soluble in both organic solvents and water makes it

possible to combine QDs with conducting polymer to fabriate hybrid solar cells.

Ocean NanoTech offers CdSe core QDs with different sur­face ligands such as octadecylamine, trioctylphousphie ox­ide and mercapopropionic acid , as well as cadmium-free QDs for solar cell research.

 

Related Products:  

CdSe Water Soluble Quantum Dots Solid (QCH)

ZnCdTe Water Soluble Quantum Dots in Solid with Carboxylic acid (TSH)

CdSe Quantum Dots in Toluene (QCO)

CdSe Quantum Dots Solid with TOPO (QPT)

CuInS Quantum Dots in Toluene (CIS)

 ZnCuInS/ZnS or CuInS/ZnS Quantum Dots in Solid Form (CSS)