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A light emitting device, includes a light emitting diode unit on a substrate; a gas-generating species; an inert gas; a barrier; and a sealant; wherein: the sealant, barrier, and substrate define a protective chamber; and the light emitting diode unit, the gas generating species, and the inert gas a

A light emitting device, includes a light emitting diode unit on a substrate; a gas-generating species; an inert gas; a barrier; and a sealant; wherein: the sealant, barrier, and substrate define a protective chamber; and the light emitting diode unit, the gas generating species, and the inert gas are disposed within the chamber.

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1. A light emitting device, comprising: a light emitting diode unit deposited on to a substrate, the light emitting diode unit comprising a cathode comprising 40K or an alloy of 40K;a gas-generating species;a barrier; anda sealant;wherein: the sealant, barrier, and substrate define a protective cham

1. A light emitting device, comprising: a light emitting diode unit deposited on to a substrate, the light emitting diode unit comprising a cathode comprising 40K or an alloy of 40K;a gas-generating species;a barrier; anda sealant;wherein: the sealant, barrier, and substrate define a protective chamber;the light emitting diode unit, the gas generating species, and an inert gas are disposed within the protective chamber; andthe gas generating species comprises 40K, a carbodiimide, an azo-compound, a cyanamide, a trizaole, an isocyanate or a combination of any two or more thereof. 2. The light emitting device of claim 1, wherein a water-reactive material, an oxygen-reactive material, or both a water-reactive material and an oxygen-reactive material are disposed within the sealant or the protective chamber. 3. The light emitting device of claim 1, wherein the inert gas comprises N2, Ar or a combination thereof. 4. The light emitting device of claim 1, wherein a pressure within the protective chamber is from about 1 bar to about 1.2 bar. 5. The light emitting device of claim 1, wherein the sealant comprises an epoxy polymer, an acrylic polymer, an acrylamide polymer, a polystyrene, a polyurethane, polyurea, polythiophene, polyphenylene, polyphenylene oxide, polyimides, polyamide, polyvinyl acetate, polyvinyl alcohol, polyethylene, polyolefin, polyesters, polyether, polytetrafluoroethylene, or a combination of any two or more thereof. 6. The light emitting device of claim 1, wherein the gas-generating species is 40K. 7. The light emitting device of claim 1, wherein the inert gas comprises 40Ar. 8. The light emitting device of claim 1, wherein the gas generating species comprises dicyclohexyl carbodiimide, N,N′-diisopropyl carbodiimide, N-(2-methyliminomethylene-ethyl)acrylamide, a poly-N-(2-methyliminomethylene-ethyl)acrylamide or a combination of any two or more thereof. 9. The light emitting device of claim 1, wherein the gas generating species is poly-N-(2-methyliminomethylene-ethyl)acrylamide. 10. The light emitting device of claim 1, wherein the gas generating species is N-(1-H-(1,2,4)-triazol-3-yl)-acrylamide. 11. The light emitting device of claim 1, wherein the sealant comprises N-(1-H-(1,2,4)-triazol-3-yl)-acrylamide. 12. The light emitting device of claim 1, wherein the sealant comprises a polyacrylamide comprising a repeat unit represented by Formula I: 13. The light emitting device of claim 1, wherein the gas generating species or the sealant comprises an isocyanate. 14. The light emitting device of claim 13, wherein the isocyanate is 2-methyl-acrylic acid-2-isocyanato-ethyl ester. 15. The light emitting device of claim 14, further comprising a polymerization product of 2-methyl-acrylic acid-2-isocyanato-ethyl ester, the polymerization product comprising repeating units according to Formula II: 16. A light emitting device, comprising: a light emitting diode unit deposited on to a substrate;a gas-generating species;a barrier; anda sealant;wherein: the sealant, barrier, and substrate define a protective chamber;the light emitting diode unit, the gas generating species, and an inert gas are disposed within the protective chamber;the gas generating species comprises 40K, a carbodiimide, an azo-compound, a cyanamide, a trizaole, an isocyanate, or a combination of any two or more thereof; andthe sealant comprises a polyacrylamide comprising repeating units represented by Formula I or an isocyanate comprising repeating units represented by Formula II with proviso that only one of Formula I and Formula II is present as the sealant: 17. The light emitting device of claim 16, wherein the light emitting diode unit is an organic light emitting diode unit. 18. The light emitting device of claim 16, wherein a water-reactive material, an oxygen-reactive material, or both a water-reactive material and an oxygen-reactive material are disposed within the sealant or the protective chamber. 19. The light emitting device of claim 16, wherein the inert gas comprises N2, Ar or a combination thereof. 20. The light emitting device of claim 16, wherein a pressure within the protective chamber is from about 1 bar to about 1.2 bar. 21. The light emitting device of claim 16, wherein the gas-generating species is 40K. 22. The light emitting device of claim 16, wherein the inert gas comprises 40Ar. 23. The light emitting device of claim 16, wherein the gas generating species comprises dicyclohexyl carbodiimide, N,N′-diisopropyl carbodiimide, N-(2-methyliminomethylene-ethyl)acrylamide, a poly-N-(2-methyliminomethylene-ethyl)acrylamide, or a combination of any two or more thereof. 24. The light emitting device of claim 16, wherein the gas generating species is poly-N-(2-methyliminomethylene-ethyl)acrylamide. 25. The light emitting device of claim 16, wherein the gas generating species is N-(1-H-(1,2,4)-triazol-3-yl)-acrylamide. 26. The light emitting device of claim 16, wherein the gas generating species comprises an isocyanate. 27. The light emitting device of claim 26, wherein the isocyanate is 2-methyl-acrylic acid-2-isocyanato-ethyl ester. 28. The light emitting device of claim 27, further comprising a polymerization product of 2-methyl-acrylic acid-2-isocyanato-ethyl ester represented by Formula II: 29. The light emitting device of claim 16, wherein the light emitting diode unit comprises a cathode comprising 40K or an alloy of 40K.