Optoelectronic device
View Patent ↗The invention is an optoelectronic device comprising an active portion which converts light to electricity or converts electricity to light, the active portion having a front side for the transmittal of the light and a back side opposite from the front side, at least two electrical leads to the active portion to convey electricity to or from the active portion, an enclosure surrounding the active portion and through which the at least two electrical leads pass wherein the hermetically sealed enclosure comprises at the front side of the active portion a barrier material which allows for transmittal of light, one or more getter materials disposed so as to not impede the transmission of light to or from the active portion, and a contiguous gap pathway to the getter material which pathway is disposed between the active portion and the barrier material.
1. An optoelectronic device comprising
a) an active portion which converts light to electricity or converts electricity to light, the active portion having a front side for the transmittal of the light and a back side opposite from the front side,
b) at least two electrical leads to the active portion to convey electricity to or from the active portion,
c) an enclosure surrounding the active portion and through which the at least two electrical leads pass wherein the enclosure comprises
at the front side of the active portion a barrier material which allows for transmittal of light
a getter material disposed so as to not impede the transmission of light to or from the active portion, and
a contiguous gap pathway to the getter material which pathway is disposed between the active portion and the barrier material wherein the contiguous gap pathway is defined by the front side of the active portion, an interior side of the barrier material and solid bridge elements providing a solid contact between the active portion and the barrier material.
2. The device of claim 1 wherein a contiguous gap pathway is also disposed between the backside of the active portion and a backside barrier material.
3. The device of claim 1 wherein the getter is disposed between the backside of the active portion and the backside barrier material.
4. The device claim 1 wherein the getter comprises an alkali metal oxide.
5. The device of claim 4 wherein the getter further comprises a molecular sieve.
6. The device of claim 3 wherein the getter composition is disposed as a flat sheet.
7. The device of claim 1 wherein the device is flexible.
8. The device of claim 1 where the active portion is moisture sensitive.
9. The device of claim 1 which is a photovoltaic device and the active portion comprises a backside electrical connector, a chalcogenide based absorber layer, a buffer layer and a transparent conductive layer.
10. The device of claim 1 wherein the bridge elements are provided by a film having an elevated pattern on it.
11. The device of claim 1 where the active portion is encapsulated.
12. The device of claim 10 where the film having an elevated pattern on it is laminated to backside and frontside barriers and where said film is heat sealed together hermetically.
13. The device of any claim 1 wherein the getter comprises a hydrogen getter, an oxygen getter or a moisture getter.
14. The device of any claim 1 where the electrical leads are hermetically sealed to sealant that hermetically seals to seal layers.
15. The device of claim 10 where the film with elevated pattern is embossed HDPE and the sealant to metal leads comprises HDPE-g-MAH.
16. The device of claim 1 where any of the layers from the active device out on the frontside have transparency greater than 70% from 380 nanometers to 1200 nanometers.
17. The device of claim 1 where the enclosure is at less than ambient pressure.
18. The device of claim 1 wherein the enclosure comprises an inert gas.
19. The device of claim 1 wherein the device is a photovoltaic device.
20. The device of claim 7 wherein the bridge elements are provided by a film having an elevated pattern on it.