Innovation

PNEUMA LIGHTING RESEARCH EMPHASIS

Pneuma R&D; Team achieved more than 16 million possibilities with more sophisticated Controllers. Blue LED uses a Indium Gallium Nitride (InGaN) on a sapphire substrate. Indium Galium Nitride is a ternary Group III/GroupV direct Band gap SemiConductor. Band gap can be tuned by varying the amount of indium in the alloy. InxGa1-xN has a direct bandgap span from the infrared (0.69 eV) for InN to the ultraviolet (3.4 eV) of GaN. Quantum heterostructures are often built from GaN with InGaN active layers
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LOW ENERGY CONSUMPTION

A two-layer multijunction cell with bandgaps of 1.1 ev and 1.7 ev can attain a theoretical 50% maximum efficiency, and by depositing multiple layers tuned to a wide range of bandgaps an efficiency up to 70% is theoretically expected

Longer Life

Pneuma R&D; Team has developed InGaN nanocolumns that can be successfully deposited on SiO 2 using plasma enhanced evaporation. Films were grown at 400 °C to facilitate indium incorporation and with precursor modulation to enhance surface morphology and metal adlayer diffusion making longer light life possible.

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