Highly transmissive electroluminescent lamp having a light emissive layer composition incorporating phosphor nano-particles and dielectric nano-particles
We disclose a highly transmissive electroluminescent lamp, where the lamp has a front electrode electrically connected to a first clear conductive layer of PDOT or functionally similar material, a phosphor layer and a dielectric layer. The phosphor layer contains nano-particles of phosphor, where the nano-particles have a size less than about 100 nm. The dielectric layer contains nano-particles of a dielectric, where these nano-particles having a size less than about 100 nm. There is a second clear conductive layer of PDOT, and a back electrode electrically connected to the second clear conductive layer, for energizing the lamp. In other embodiments, the particles in the phosphor layer may have sizes larger than 100 nm, while still achieving the effect of substantial transparency of the lamp.
1. A highly light transmissive EL lamp having a light-emitting layer, where:
the light-emitting layer of the EL lamp comprises a composition of:
phosphor nano-particles;
dielectric nano-particles; and,
a binder.
2. The EL lamp of claim 1 , where
the phosphor nano-particles comprise about 40 to 80% of the composition by weight;
the dielectric nano-particles comprise about 2 to 25% of the composition by weight; and,
the binder comprises about 10 to 58% of the composition by weight.
3. The EL lamp of claim 1 where the phosphor nano-particles have a size less than approximately 100 nm.
4. The EL lamp of claim 1 where the dielectric nano-particles have a size less than approximately 100 nm.
5. A stacked EL lamp comprising:
a plurality of highly light transmissive EL lamp layers according to claim 1 ;
the highly light transmissive EL lamp layers separated by insulating layers;
each of the highly light transmissive EL lamp layers having an electrical connection for energizing the lamp layers.