Transparent display device and method of manufacturing the same
A transparent display device including a base substrate and a plurality of pixels disposed on the base substrate, each pixel having an emission area and a transmission area transparent to external light, each of the pixels including a circuit element layer disposed on the base substrate, a first electrode disposed on the circuit element layer and corresponding to the emission area, a pixel define layer disposed on the circuit element layer, the pixel define layer including a first sidewall defining the emission area and a second sidewall defining the transmission area, an emission layer disposed on the first electrode and corresponding to the emission area, and a second electrode disposed on the emission layer and including an opening that corresponds to the transmission area, in which the first sidewall is inclined at a first angle, and the second sidewall is inclined at a second angle greater than the first angle.
1. A transparent display device comprising a base substrate and a plurality of pixels disposed on the base substrate, each pixel having an emission area and a transmission area transparent to external light, each of the pixels comprising:
a circuit element layer disposed on the base substrate;
a first electrode disposed on the circuit element layer and corresponding to the emission area;
a pixel define layer disposed on the circuit element layer, the pixel define layer including a first sidewall defining the emission area and a second sidewall defining the transmission area;
an emission layer disposed on the first electrode and corresponding to the emission area; and
a second electrode disposed on the emission layer and including an opening that corresponds to the transmission area,
wherein the first sidewall is inclined at a first angle, and
wherein the second sidewall is inclined at a second angle greater than the first angle.
2. The transparent display device of claim 1 , wherein:
the first angle of the first sidewall is greater than 0° and equal to or less than about 30°; and
the second angle of the second sidewall is greater than about 30° and less than about 90°.
3. The transparent display device of claim 1 , wherein the second electrode has a thickness of about 35 Å to about 80 Å.
4. The transparent display device of claim 1 , further comprising:
a first organic layer disposed between the first electrode and the emission layer, corresponding to the emission area, and having an opening in the transmission area; and
a second organic layer disposed between the emission layer and the second electrode, corresponding to the emission area, and having an opening in the transmission area.
5. The transparent display device of claim 1 , further comprising a third electrode disposed on the second electrode and corresponding to the emission area.
6. The transparent display device of claim 5 , wherein the third electrode includes a material having a transmittance of at least 50%, and is disposed to extend toward the transmission area.
7. The transparent display device of claim 6 , wherein the third electrode has a thickness of about 50 Å to about 500 Å.
8. The transparent display device of claim 1 , wherein:
each of the pixels has a plurality of sub-pixels; and
the emission area includes a plurality of emission areas that respectively correspond to the plurality of sub-pixels.
9. The transparent display device of claim 8 , wherein the circuit element layer includes:
a sub-pixel circuit disposed on the plurality of emission areas; and
a plurality of signal lines connected to the sub-pixel circuit.
10. The transparent display device of claim 9 , wherein the plurality of signal lines do not overlap the transmission area.