Substrate

Abstract

The present application provides a substrate, an organic electronic device and a use thereof. The substrate of the present application has a structure comprising an electrode layer directly formed on the corrugated surface of the optical functional layer, and upon having formed an organic electronic device, can secure excellent functionality, for example, light extraction efficiency, and the like, together with stable drive of the element for a long time.

Claims

1. A substrate comprising a support base layer; an optical functional layer formed on the support base layer; and an electrode layer formed on the optical functional layer, wherein the surface of the optical functional layer opposite to the support base layer is a corrugated surface having an average roughness (Ra) of 5 nm or more and a 10-point average roughness (Rz) of 30 nm or more, the optical functional layer comprises scattering particles and a binder, and the electrode layer is formed in contact with the corrugated surface of the optical functional layer.

2. The substrate according to claim 1, wherein no flat layer is present between the optical functional layer and the electrode layer.

3. The substrate according to claim 1, wherein the optical functional layer is a light-scattering layer.

4. The substrate according to claim 1, wherein the optical functional layer has a haze of 20% or more.

5. The substrate according to claim 1, wherein the optical functional layer has a thickness of 150 nm or more.

6. The substrate according to claim 1, wherein the optical functional layer has a thickness in a range of 150 nm to 300 nm and a haze of 60% or more.

7. The substrate according to claim 1, wherein the optical functional layer is formed to include an upper layer and a lower layer.

8. The substrate according to claim 7, wherein the ratio (TL/TU) of the thickness (TL) of the lower layer to the thickness (TU) of the upper layer is in a range of 1 to 10.

9. The substrate according to claim 7, wherein the number of scattering particles per unit volume of the upper layer is greater than the number of scattering particles per unit volume of the lower layer.

10. The substrate according to claim 1, wherein the optical functional layer further comprises a matrix material having a refractive index in a range of 1.5 to 1.75 for light having a wavelength of 550 nm.

11. The substrate according to claim 10, wherein the matrix material comprises a binder having a refractive index in a range of 1.4 to 1.65 for light having a wavelength of 550 nm and highly refractive particles having a refractive index of at least 1.5 for light having a wavelength of 550 nm.

12. The substrate according to claim 11, wherein the matrix material comprises 50 parts by weight or more of highly refractive particles relative to 100 parts by weight of the binder.

13. The substrate according to claim 1, wherein the electrode layer is an indium tin oxide layer.

14. An organic electronic device comprising: the substrate of claim 1; and an element region having an organic layer present on the electrode layer of said substrate.

15. A light source for a display comprising the organic electronic device of claim 14.

16. A lighting apparatus comprising the organic electronic device of claim 14.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a diagram of an exemplary substrate. Reference Numeral 101 denotes a support base material, Reference Numeral 102 denotes an optical functional layer, Reference Numeral 103 denotes an electrode layer, and Reference Numeral 104 denotes an organic electronic device.

(2) FIG. 2 is a photograph of the corrugated surface produced in an example.

BEST MODE

(3) Hereinafter, the present application will be described in detail by way of examples and comparative examples, but the scope of the present application is not limited by the following examples.

(4) 1. Measurement of Average Roughness (Ra) and 10-Point Average Roughness (Rz)

(5) In Examples, the average roughness (Ra) and the 10-point average roughness were measured by using a WSI (White-Light Scanning Interferometry) mode as 3D Optical Profiler and using a Nano View E1000 product from Nanosystem equipped with a HeNe laser (633 nm), and identified using the software provided with the Profiler.

(6) 2. Measuring Method of Haze

(7) In Examples and Comparative Examples, the haze is a result of evaluation using JIS K 7105 method using HM-150.

Example 1

(8) Preparation of Composition

(9) Polysiloxane (PVMQ, phenyl vinyl methyl siloxane) having a refractive index of about 1.45 to 1.55 as a binder and zirconia particles (highly refractive particles) (ZrO.sub.2) having a refractive index of about 2.0 and an average particle diameter of about 7 nm were mixed in a weight ratio of about 45:55 (PVMQ:ZrO.sub.2) to prepare a coating composition capable of forming a layer having a refractive index of about 1.6. Subsequently, rutile titanium oxide (rutile TiO.sub.2) having a refractive index of about 2.5 and an average particle diameter of about 250 nm as scattering particles was mixed with the mixture (PVMQ+ZrO.sub.2) in a weight ratio of about 90:10 (mixture:scattering particles) to prepare a first composition.

(10) After coating the first composition on a glass substrate to a final thickness of about 200 nm, the haze of the optical functional layer formed through the condensation reaction according to a known method was measured and the result was identified to be about 45%.

(11) Also, a composition was prepared in the same manner as above, but the ratio of the mixture to the scattering particles (rutile TiO.sub.2) was adjusted to 94:6 (mixture:scattering particles) to prepare a second composition.

(12) After coating the second composition on a glass substrate to a final thickness of about 500 nm, the haze of the optical functional layer formed through the condensation reaction according to a known method was measured and the result was identified to be about 25%.

(13) Manufacture of Substrate and Organic Light Emitting Device

(14) The second composition as prepared above was coated on a glass substrate (refractive index: about 1.5) so as to have a final thickness of about 500 nm, and then subjected to a condensation reaction to form a bottom optical functional layer comprising polysiloxane, highly refractive particles (ZrO.sub.2) and scattering particles (rutile TiO.sub.2).

(15) Subsequently, the first composition was coated on the bottom optical functional layer so as to have a final thickness of about 200 nm, and then subjected to a condensation reaction to form a top optical functional layer comprising polysiloxane, highly refractive particles (ZrO.sub.2) and scattering particles (rutile TiO.sub.2) as well.

(16) The measured haze of the top and bottom optical functional layers as a whole was about 60%, and the average roughness (Ra) of the surface (top optical functional layer surface) was about 9.61 nm and the 10-point average roughness (Rz) was about 78.93 nm. FIG. 2 is a microphotograph of the top optical functional layer surface measured at magnifications of 10K, 30K and 40K, respectively.

(17) Subsequently, an ITO (Indium Tin Oxide) conductive layer (refractive index: about 2.0) was directly formed on the surface of the top optical functional layer by a known deposition method to a thickness of about 75 nm to manufacture a substrate.

(18) Subsequently, a hole injecting layer, a hole transporting layer, an organic light emitting layer, an electron transporting layer and an electron injecting layer, which are organic layers as materials used for formation of a known white OLED, were sequentially formed on the ITO electrode layer of the substrate and an aluminum electrode layer, which is a reflective electrode, was again formed thereon to form an organic electronic device.

Example 2

(19) Preparation of Composition

(20) A composition was formed in the same manner as in the preparation of composition in Example 1, but the weight ratio (mixture:scattering particles) of the mixture (PVMQ+ZrO.sub.2) and the scattering particles (rutile TiO.sub.2) was adjusted to about 93:7 to prepare the first composition.

(21) After coating the first composition on a glass substrate to a final thickness of about 200 nm, the haze of the optical functional layer formed through the condensation reaction according to a known method was measured and the result was identified to be about 35%.

(22) Also, a composition was prepared in the same manner as above, but the ratio of the mixture to the scattering particles (rutile TiO.sub.2) was adjusted to 97:3 (mixture:scattering particles) to prepare a second composition.

(23) After coating the second composition on a glass substrate to a final thickness of about 500 nm, the haze of the optical functional layer formed through the condensation reaction according to a known method was measured and the result was identified to be about 15%.

(24) Manufacture of Substrate and Organic Light Emitting Device

(25) The second composition as prepared above was coated on a glass substrate (refractive index: about 1.5) so as to have a final thickness of about 500 nm, and then subjected to a condensation reaction to form a bottom optical functional layer comprising polysiloxane, highly refractive particles (ZrO.sub.2) and scattering particles (rutile TiO.sub.2).

(26) Subsequently, the first composition was coated on the bottom optical functional layer so as to have a final thickness of about 200 nm, and then subjected to a condensation reaction to form a top optical functional layer comprising polysiloxane, highly refractive particles (ZrO.sub.2) and scattering particles (rutile TiO.sub.2) as well.

(27) The measured haze of the top and bottom optical functional layers as a whole was about 45%, and the average roughness (Ra) of the surface (top optical functional layer surface) was about 7.36 nm and the 10-point average roughness (Rz) was about 70.96 nm.

(28) Subsequently, an ITO (Indium Tin Oxide) electrode layer was directly formed on the surface of the top optical functional layer in the same manner as in Example 1 to manufacture a substrate.

(29) Subsequently, a hole injecting layer, a hole transporting layer, an organic light emitting layer, an electron transporting layer and an electron injecting layer, which are organic layers as materials used for formation of a known white OLED, were sequentially formed on the ITO electrode layer of the substrate and an aluminum electrode layer, which is a reflective electrode, was again formed thereon to form an organic electronic device.

Example 3

(30) Preparation of Composition

(31) A composition was formed in the same manner as in the preparation of composition in Example 1, but the weight ratio (mixture:scattering particles) of the mixture (PVMQ+ZrO.sub.2) and the scattering particles (rutile TiO.sub.2) was adjusted to about 80:20 to prepare the first composition.

(32) After coating the first composition on a glass substrate to a final thickness of about 200 nm, the haze of the optical functional layer formed through the condensation reaction according to a known method was measured and the result was identified to be about 60%.

(33) Manufacture of Substrate and Organic Light Emitting Device

(34) The first composition as prepared above was coated on a glass substrate (refractive index: about 1.5) so as to have a final thickness of about 200 nm, and then subjected to a condensation reaction to form an optical functional layer comprising polysiloxane, highly refractive particles (ZrO.sub.2) and scattering particles (rutile TiO.sub.2).

(35) The measured haze of the optical functional layer was about 60%, and the average roughness (Ra) of the surface (top optical functional layer surface) was about 9.59 nm and the 10-point average roughness (Rz) was about 76.18 nm.

(36) Subsequently, an ITO (Indium Tin Oxide) electrode layer was directly formed on the surface of the top optical functional layer in the same manner as in Example 1 to manufacture a substrate.

(37) Subsequently, a hole injecting layer, a hole transporting layer, an organic light emitting layer, an electron transporting layer and an electron injecting layer, which are organic layers as materials used for formation of a known white OLED, were sequentially formed on the ITO electrode layer of the substrate and an aluminum electrode layer, which is a reflective electrode, was again formed thereon to form an organic electronic device.

Example 4

(38) Preparation of Composition

(39) Polysiloxane (PVMQ, phenyl vinyl methyl siloxane) having a refractive index of about 1.45 to 1.55 as a binder and zirconia particles (highly refractive particles) (ZrO.sub.2) having a refractive index of about 2.0 and an average particle diameter of about 7 nm were mixed in a weight ratio of about 45:55 (PVMQ:ZrO.sub.2) to prepare a coating composition capable of forming a layer having a refractive index of about 1.6. Subsequently, rutile titanium oxide (rutile TiO.sub.2) having a refractive index of about 2.5 and an average particle diameter of about 250 nm as scattering particles was mixed with the mixture (PVMQ+ZrO.sub.2) in a weight ratio of about 90:10 (mixture:scattering particles) to prepare a first composition.

(40) After coating the first composition on a glass substrate to a final thickness of about 200 nm, the haze of the optical functional layer formed through the condensation reaction according to a known method was measured and the result was identified to be about 45%.

(41) Also, a second composition was prepared in the same manner as above, except that the scattering particles were not applied thereto.

(42) After coating the second composition on a glass substrate to a final thickness of about 500 nm, the haze of the optical functional layer formed through the condensation reaction according to a known method was measured and the result was identified to be about 0%.

(43) Manufacture of Substrate and Organic Light Emitting Device

(44) The second composition as prepared above was coated on a glass substrate (refractive index: about 1.5) so as to have a final thickness of about 500 nm, and then subjected to a condensation reaction to form a bottom optical functional layer comprising polysiloxane and highly refractive particles (ZrO.sub.2).

(45) Subsequently, the first composition was coated on the bottom optical functional layer so as to have a final thickness of about 200 nm, and then subjected to a condensation reaction to form a top optical functional layer comprising polysiloxane, highly refractive particles (ZrO.sub.2) and scattering particles (rutile TiO.sub.2) as well.

(46) The measured haze of the top and bottom optical functional layers as a whole was about 47%, and the average roughness (Ra) of the surface (top optical functional layer surface) was about 7.46 nm and the 10-point average roughness (Rz) was about 66.58 nm.

(47) Subsequently, an ITO (Indium Tin Oxide) electrode layer was directly formed on the surface of the top optical functional layer in the same manner as in Example 1 to manufacture a substrate.

(48) Subsequently, a hole injecting layer, a hole transporting layer, an organic light emitting layer, an electron transporting layer and an electron injecting layer, which are organic layers as materials used for formation of a known white OLED, were sequentially formed on the ITO electrode layer of the substrate and an aluminum electrode layer, which is a reflective electrode, was again formed thereon to form an organic electronic device.

Example 5

(49) Preparation of Composition

(50) A composition was formed in the same manner as in the preparation of composition in Example 1, but the weight ratio (mixture:scattering particles) of the mixture (PVMQ+ZrO.sub.2) and the scattering particles (rutile TiO.sub.2) was adjusted to about 85:15 to prepare the first composition.

(51) After coating the first composition on a glass substrate to a final thickness of about 200 nm, the haze of the optical functional layer formed through the condensation reaction according to a known method was measured and the result was identified to be about 50%.

(52) Also, a composition was prepared in the same manner as above, but the ratio of the mixture to the scattering particles (rutile TiO.sub.2) was adjusted to 97:3 (mixture:scattering particles) to prepare a second composition.

(53) After coating the second composition on a glass substrate to a final thickness of about 500 nm, the haze of the optical functional layer formed through the condensation reaction according to a known method was measured and the result was identified to be about 15%.

(54) Manufacture of Substrate and Organic Light Emitting Device

(55) The second composition as prepared above was coated on a glass substrate (refractive index: about 1.5) so as to have a final thickness of about 500 nm, and then subjected to a condensation reaction to form a bottom optical functional layer comprising polysiloxane, highly refractive particles (ZrO.sub.2) and scattering particles (rutile TiO.sub.2).

(56) Subsequently, the first composition was coated on the bottom optical functional layer so as to have a final thickness of about 200 nm, and then subjected to a condensation reaction to form a top optical functional layer comprising polysiloxane, highly refractive particles (ZrO.sub.2) and scattering particles (rutile TiO.sub.2) as well.

(57) The measured haze of the top and bottom optical functional layers as a whole was about 60%, and the average roughness (Ra) of the surface (top optical functional layer surface) was about 9.24 nm and the 10-point average roughness (Rz) was about 80.38 nm.

(58) Subsequently, an ITO (Indium Tin Oxide) electrode layer was directly formed on the surface of the top optical functional layer in the same manner as in Example 1 to manufacture a substrate.

(59) Subsequently, a hole injecting layer, a hole transporting layer, an organic light emitting layer, an electron transporting layer and an electron injecting layer, which are organic layers as materials used for formation of a known white OLED, were sequentially formed on the ITO electrode layer of the substrate and an aluminum electrode layer, which is a reflective electrode, was again formed thereon to form an organic electronic device.

Comparative Example 1

(60) Preparation of Composition

(61) Polysiloxane (PVMQ, phenyl vinyl methyl siloxane) having a refractive index of about 1.45 to 1.55 as a binder and zirconia particles (highly refractive particles) (ZrO.sub.2) having a refractive index of about 2.0 and an average particle diameter of about 7 nm were mixed in a weight ratio of about 45:55 (PVMQ:ZrO.sub.2) to prepare a coating composition (a first composition) capable of forming a layer having a refractive index of about 1.6.

(62) Also, a mixture (PVMQ+ZnO.sub.2) prepared in the same manner as above and scattering particles (rutile titanium oxide (rutile TiO.sub.2) having a refractive index of about 2.5 and an average particle diameter of about 250 nm) were adjust in a weight ratio of about 94:6 (mixture:scattering particles) to prepare a second composition.

(63) After coating the second composition on a glass substrate to a final thickness of about 500 nm, the haze of the optical functional layer formed through the condensation reaction according to a known method was measured and the result was identified to be about 25%.

(64) Manufacture of Substrate and Organic Light Emitting Device

(65) The second composition as prepared above was coated on a glass substrate (refractive index: about 1.5) so as to have a final thickness of about 500 nm, and then subjected to a condensation reaction to form a bottom optical functional layer comprising polysiloxane, highly refractive particles (ZrO.sub.2) and scattering particles (rutile TiO.sub.2).

(66) Subsequently, the first composition was coated on the bottom optical functional layer so as to have a final thickness of about 200 nm, and then subjected to a condensation reaction to form a top optical functional layer comprising polysiloxane and highly refractive particles (ZrO.sub.2).

(67) The measured haze of the top and bottom optical functional layers as a whole was about 25%, and the average roughness (Ra) of the surface (top optical functional layer surface) was about 2.08 nm and the 10-point average roughness (Rz) was about 27.52 nm.

(68) Subsequently, an ITO (Indium Tin Oxide) electrode layer (refractive index: about 2.0) was directly formed on the surface of the top optical functional layer by a known deposition method to a thickness of about 75 nm to manufacture a substrate.

(69) Subsequently, a hole injecting layer, a hole transporting layer, an organic light emitting layer, an electron transporting layer and an electron injecting layer, which are organic layers as materials used for formation of a known white OLED, were sequentially formed on the ITO electrode layer of the substrate and an aluminum electrode layer, which is a reflective electrode, was again formed thereon to form an organic electronic device.

Comparative Example 2

(70) A substrate was manufactured in the same manner as in Example 3, but a highly refractive flat layer (refractive index of about 1.72) made of a known material was formed without forming an ITO electrode layer directly on the optical functional layer, and then an ITO electrode layer was formed to prepare the substrate, and the organic electronic device was produced equally.

(71) While organic electronic devices of Examples and Comparative Examples above were driven under a condition of 3 mA/cm2, each of P.E (luminescent efficiency) (unit: lm/W) and Q.E. (quantum efficiency) (unit: %) was measured and the results were summarized and described in Table 1 below.

(72) TABLE-US-00001 TABLE 1 Example Comparative Example 1 2 3 4 5 1 2 Q.E. 60.4 59.2 57.6 58.6 58.5 56.2 55.7 P.E. 68 69 50.7 67 68 65 49.3