Patent
Emission layer and organic light emitting diode using the same
| العنوان: | Emission layer and organic light emitting diode using the same |
|---|---|
| Patent Number: | 7,863,812 |
| تاريخ النشر: | January 04, 2011 |
| Appl. No: | 12/149773 |
| Application Filed: | May 08, 2008 |
| مستخلص: | An emission layer of an organic light emitting diode (OLED) for emitting a white light includes a host material, a first luminescent dopant, and a second luminescent dopant. The host material has a peak emission wavelength of about 300 nm to about 530 nm. The first luminescent dopant has a peak emission wavelength of about 300 nm to about 530 nm. The second luminescent dopant has a peak emission wavelength of about 530 nm to about 720 nm. |
| Inventors: | Hung, Min-Ling (Pingtung County, TW) |
| Assignees: | Au Optronics Corp. (Hsin-Chu, TW) |
| Claim: | 1. An organic light emitting diode (OLED) comprising: an electron-transport layer; a hole-transport layer opposed to the electron-transport layer; and an emission layer disposed between the electron-transport layer and the hole-transport layer, the emission layer comprising: a host material, comprising 2-methyl-9,10-di(2-naphthyl) anthracene (MADN); a first luminescent dopant for emitting blue light, the first luminescent dopant comprising perylene; and a second luminescent dopant for emitting red or yellow light, the second luminescent dopant comprising 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyl-julolidyl-9-enyl)-4H-pyran) (DCJTB); wherein an absolute value of the highest occupied molecular orbital (HOMO) of the first luminescent dopant is less than or equal to that of the host material, and an absolute value of the lowest unoccupied molecular orbital (LUMO) of the first luminescent dopant is more than or equal to that of the host material. |
| Claim: | 2. The OLED according to claim 1 , wherein an absolute value of the HOMO of the second luminescent dopant is less than or equal to that of the first luminescent dopant, and an absolute value of the LUMO of the second luminescent dopant is more than or equal to that of the first luminescent dopant. |
| Claim: | 3. The OLED according to claim 1 , wherein the absolute value of the HOMO of the host material is more than or equal to that of the hole-transport layer, and the absolute value of the LUMO of the host material is less than or equal to that of the electron-transport layer. |
| Claim: | 4. The OLED according to claim 1 , wherein the doped ratio of the first luminescent dopant to the host material is substantially between 0.01 and 50 percent by volume. |
| Claim: | 5. The OLED according to claim 4 , wherein the doped ratio of the second luminescent dopant to the host material is substantially between 0.01 and 5 percent by volume. |
| Claim: | 6. The OLED according to claim 4 , wherein the doped ratio of the second luminescent dopant to the host material is substantially between 0.1 and 5 percent by volume. |
| Claim: | 7. The OLED according to claim 4 , wherein the doped ratio of the first luminescent dopant to the host material is substantially between 0.01 and 20 percent by volume. |
| Claim: | 8. The OLED according to claim 1 , wherein the doped ratio of the second luminescent dopant to the host material is substantially between 0.1 and 5 percent by volume. |
| Claim: | 9. The OLED according to claim 1 , wherein the MADN host material is doped with 8% of perylene and 0.1% of DCJTB, the hole-transport layer is NPB, Alq is the electron-transport layer and said OLED further comprises an ITO anode below the hole-transport layer and a LiF/Al cathode above the electron-transport layer. |
| Current U.S. Class: | 313/504 |
| Patent References Cited: | 5503910 April 1996 Matsuura et al. 5683823 November 1997 Shi et al. 5779937 July 1998 Sano et al. 5972247 October 1999 Shi et al. 6203933 March 2001 Nakaya et al. 6627333 September 2003 Hatwar 6641933 November 2003 Yamazaki et al. 6690109 February 2004 Tada 6696703 February 2004 Mueller-Mach et al. 7238436 July 2007 Hatwar et al. 2002/0127427 September 2002 Young et al. 2003/0067008 April 2003 Srivastava et al. 2004/0033388 February 2004 Kim et al. 2004/0247937 December 2004 Chen et al. 2005/0089714 April 2005 Hatwar et al. 2005/0112404 May 2005 Hamada et al. 2005/0123794 June 2005 Deaton et al. 2006/0024525 February 2006 Jeong et al. 2006/0115681 June 2006 Kambe et al. 2007/0057885 March 2007 Kurumisawa et al. 1585580 February 2005 593630 June 2004 224473 November 2004 WO 2005043640 May 2005 |
| Primary Examiner: | Patel, Vip |
| Attorney, Agent or Firm: | Bacon & Thomas, PLLC |
| رقم الانضمام: | edspgr.07863812 |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |