Dr. Min-Hao Michael Lu is the President of Sagitta Research, LLC.  Mike has a Ph.D. in Electrical Engineering from Princeton University.  From 2001-2007, he was a Senior Scientist at Universal Display Corporation (UDC).  While at UDC, he worked closely with many leading OLED display manufacturers, including Samsung, Sony and Seiko Epson.

He is an expert on microcavity effects in OLEDs, transparent cathodes and OLED lifetime optimization:
  • He patented several transparent cathode designs that in 2002 led to a top-emission OLED more efficient than the bottom-emitting control and having lifetime 80% of the control. 
  • He led UDC's effort in solution processible phosphorescent OLEDs that doubled both red and green device lifetime while maintaining or improving efficiency every six months for three years. 
  • He was the architect of a hybrid OLED fabrication system capable of both solution process and vacuum thermal evaporation.
  • He was among the first to suggest using microlens array to increase OLED outcoupling efficiency and the first to recognize the positive impact of high-index substrates on external outcoupling enhancement schemes (US 7,053,547).
  • He was the first to fabricate phosphorescent OLEDs with mixed host emissive layers (US 7,045,952).

Mike is also an expert on the integration of OLEDs onto active-matrix backplanes.  He was on the team that proposed the first 4-TFT pixel for AMOLEDs.  He has several patents on AMOLED pixels and has published papers on power consumption and temperature increase in AMOLED displays.

Mike has over 14 years of experience in this field.  He has more than 45 publications related to OLEDs and AMOLED displays.  He is the inventor or co-inventor on 15 issued US patents.


Sagitta Research
Copyright 2009 | Sagitta Research, LLC | All rights reserved.
solutions for the organic electronics industry
Dr. Min-Hao Michael Lu
President
About Sagitta Research

Sagitta (sə-jĭt'ə): Latin for arrow, also the name of a minor constellation (Wikipedia: sagitta)
Issued US Patents
  1. US 6,569,697 Min-Hao Michael Lu, Michael S. Weaver, and Michael Hack, "Method of fabricating electrodes".
  2. US 6,784,016 Ke Long, James S. Sturm and Min-Hao Michael Lu, "Organic light-emitting devices with blocking and transport layers".
  3. US 6,885,025 Yeh-Jiun Tung, Michael Lu, and Raymond C. Kwong, "Organic Light Emitting Device Structures for Obtaining Chromaticity Stability".
  4. US 6,891,326 Min-Hao Michael Lu, "Structure and method of fabricating organic devices".
  5. US 6,897,474 Julia J. Brown, Michael Stuart Weaver, and Min-Hao Michael Lu, "Protected organic electronic devices and methods for making the same".
  6. US 6,900,458 Yeh-Jiun Tung, Min-Hao Michael Lu, and Vladimir Bulovic, "Transflective display having an OLED backlight".
  7. US 6,902,833 Mark E. Thompson, Simona Garon, Raymond Kwong, Jason Brooks, and Min-Hao Michael Lu, "Materials and structures for enhancing the performance of organic light emitting devices".
  8. US 6,982,179 Raymond Kwong and Min-Hao Michael Lu, "Structure and method of fabricating organic devices".
  9. US 7,012,363 Michael Stuart Weaver, Vladimir Bulovic, Min-Hao Michael Lu, "OLEDs having increased external electroluminescence quantum efficiencies".
  10. US 7,045,952 Michael Lu, "OLEDs with mixed host emissive layer".
  11. US 7,049,636 Michael S. Weaver, Michael Hack, and Min-Hao Michael Lu, "Device including OLED controlled by n-type transistor".
  12. US 7,053,547 Min-Hao Michael Lu, James C. Sturm, Conor Francis Madigan, and Raymond Kwong, "Increased emission efficiency in organic light-emitting devices on high-index substrates".
  13. US 7,061,175 Michael S. Weaver, Min-Hao Michael Lu, and Theodore Zhou, "Efficient transparent cathode".
  14. US 7,071,615 Min-Hao Michael Lu, and Michael S. Weaver, "Transparent electrodes".
  15. US 7,285,432 Raymond Kwong, and Min-Hao Michael Lu, "Structure and method of fabricating organic devices".
Many of these patents also have corresponding international filings.
Publications by Topic
Solution processed phosphorescent OLEDs
  1. M.-H. Lu, M. S. Weaver, M. Rothman, T. Ngo, H. Yamamoto, J. Brooks, S. Xia, R. C. Kwong, J. J. Brown, A. Fukase, S. Tomioka, S. Seki and S. Miyashita, "Ink Jet Printable Phosphorescent Organic Light-Emitting Devices", IDRC 2006, paper 5.5, Kent, Ohio, Sept. 18-21, 2006.
  2. M. S. Weaver, B. W. D'Andrade, M. H. Lu, Y. Tung, R. C. Kwong, M. Hack and J. J. Brown, "Recent Advances in Phosphorescent OLEDs for Small and Large Area Display Sizes", Eurodisplay, Edinburgh, Scotland, UK, 2005.
Active and passive-matrix OLED displays
  1. Min-Hao Michael Lu, Michael Hack, Richard Hewitt, Michael S. Weaver and Julia J. Brown, "Power Consumption and Temperature Increase in Large Area Active-Matrix OLED Displays", IEEE J. Disp. Tech., 4, pp. 47-53 (2008).
  2. M. Hack, A. Chwang, M.H. Lu, R. Kwong, M.S. Weaver, Y.-J. Tung and J.J. Brown, "Applications and Status of OLED technology relative to mobile product requirements", SPIE Defence and Security Symp., Orlando, FL, Apr. 12-16, 2004.
  3. M. Hack, A. Chwang, M.H. Lu, R. Kwong, M.S. Weaver, Y.-J. Tung and J.J. Brown, "Flexible Low Power Consumption OLED Displays for a Universal Communication Device ", Proc SPIE Int Soc Opt Eng,  5080, 170-179 (2003).
  4. M. Hack, M.H. Lu, R. Kwong, M.S. Weaver, Y.-J. Tung, A. Chwang and J.J. Brown, "Performance and Applications of High Efficiency Phosphorescent OLED Technology", IMID, Daegu, Korea, 2003.
  5. M. Hack, M.H. Lu, R. Kwong, M.S. Weaver, Y.-J. Tung, A. Chwang and J.J. Brown, "High Efficiency OLED Technology for PM and AM Display Applications", Proc. Int. Disp. Manu. Conf., Taiwan, 2003.
  6. M. Hack, M. Lu, R. Kwong, M.S. Weaver, J.J. Brown, J.A. Nichols and T.N. Jackson, "High efficiency phosphorescent OLEDs and their addressing with poly or amorphous TFTs", paper 1-2, 22nd IDRC, Nice, France, Oct. 1-4, 2002.
  7. M. Hack, M. Lu, R. Kwong, M.S. Weaver, J.J. Brown, J.A. Nichols and T.N. Jackson, "High efficiency phosphorescent OLED Technology", Proceedings of the 7th Asian Symposium on Information Display, p. 187, Singapore, Sept. 2-4, 2002, and J. Soc. Info. Disp. 11, 297 (2003).
  8. J.A. Nichols, T.N. Jackson, M.H. Lu, M. Hack, "Bi-stable a-Si:H TFT phosphorescent OLED active matrix pixel", Proc. Dev. Res. Conf., pp. 189-190, June 23-25, 2003.
  9. J. Nichols, T. Jackson, M. H. Lu, and M. Hack, "Phosphorescent OLED Amorphous Silicon TFT Active-Matrix Pixel", Electronic Materials Conference, paper W2, Santa Barbara, CA, June 26-28, 2002.
  10. J. Nichols, T. Jackson, M. H. Lu, and M. Hack, "a-Si:H TFT Active-Matrix Phosphorescent OLED Pixel", SID Dig., 52.4L (2002).
  11. S. H. Ju, S. H. Yu, J. H. Kwon, H. D. Kim, B. H. Kim, H. K. Chung, M. S. Weaver, M. H. Lu, R. C. Kwong, M. Hack and J. J. Brown, "High Performance 2.2" QCIF Full Color AMOLED Displays based on Electrophosphorescence", SID Dig., 37.3 (2002).
  12. M. Hack, R. Kwong, M. S. Weaver, M. Lu, and J. J. Brown, "Active-Matrix Technology for High Efficiency OLED Displays", Proc. Int. Disp. Manu. Conf., pp. 57-60, Seoul, Korea, Jan. 29-31, 2002, and J. Soc. Info. Disp. 10/4, 323 (2002).
  13. R. M. A. Dawson, Z. Shen, D.A. Furst, S. Connor, J. Hsu, M.G. Kane, R. G. Stewart, A. Ipri, C. N. King, P. J. Geen, R. T. Flegal, S. Pearson, W. A. Barrow, E. Dickey, K. Ping, S. Robinson, C. W. Tang, S. Van Slyke, F. Chen, J. Shi, M. H. Lu, M. Moskewicz, and J. C. Sturm, "A Polysilicon Active Matrix Organic Light Emitting Diode Display with Integrated Drivers", SID Dig., 438 (1999).
  14. M. H. Lu, E. Ma, J. C. Sturm, and S. Wagner, "Amorphous Silicon TFT Active-Matrix OLED Pixel", Proc. LEOS'98, 130 (1998).
  15. R. M. A. Dawson, M. G. Kane, Z. Shen, D.A. Furst, S. Connor, J. Hsu, R. G. Stewart, A. Ipri, C. N. King, P. J. Geen, R. T. Flegal, S. Pearson, W. A. Barrow, E. Dickey, K. Ping, S. Robinson, C. W. Tang, S. Van Slyke, F. Chen, J. Shi, J. C. Sturm, and M. H. Lu, "Active Matrix Organic Light Emitting Diode Pixel Design using  Polysilicon Thin Film Transistors", Proc. LEOS'98, 128 (1998).
  16. R. M. A. Dawson, Z. Shen, D.A. Furst, S. Connor, J. Hsu, M.G. Kane. R. G. Stewart, A. Ipri, C. N. King, P. J. Geen, R. T. Flegal, S. Pearson, W. A. Barrow, E. Dickey, K. Ping, S. Robinson, C. W. Tang, S. Van Slyke, F. Chen, J. Shi, M. H. Lu, and J. C. Sturm, "The Impact of the Transient Response of Organic Light Emitting Diodes on the Design of Active Matrix OLED Displays", IEDM Tech. Dig., 875 (1998).
  17. R. M. A. Dawson, Z. Shen, D.A. Furst, S. Connor, J. Hsu, M.G. Kane. R. G. Stewart, A. Ipri, C. N. King, P. J. Geen, R. T. Flegal, S. Pearson, W. A. Barrow, E. Dickey, K. Ping, S. Robinson, C. W. Tang, S. Van Slyke, F. Chen, J. Shi, J. C. Sturm and M. H. Lu, "Design of an Improved Pixel for a Polysilicon Active-Matrix Organic LED Display", SID Dig., 11 (1998).
  18. E. Y. Ma, S. D. Theiss, M. H. Lu, J.C. Sturm and S. Wagner, "Thin Film Transistors for Foldable Displays", IEDM Tech. Dig., 535 (1997).
  19. E.Y. Ma, S. D. Theiss, M. H. Lu, C. C. Wu, J. C. Sturm, and S. Wagner, "Organic Light Emitting Diode/Thin Film Transistor Integration for Foldable Displays", 17th Int. Disp. Res. Conf., L78 (1997).
  20. C. C. Wu, S. D. Theiss, G. Gu, M. H. Lu, J. C. Sturm, S. Wagner and S. R. Forest, "Integration of organic LEDs and a-Si TFTs onto unbreakable and flexible metal foil substrates", IEEE Elec. Dev. Lett. 18, 609 (1997).
  21. C. C. Wu, S. Theiss, M. H. Lu, J. C. Sturm, and S. Wagner, "Integration of organic LEDs and amorphous Si TFTs onto unbreakable metal foil substrates", IEDM Tech. Dig., 957 (1996).
Top-emitting/transparent OLEDs
  1. M.-H. Lu, M. S. Weaver, T. X. Zhou, M. Rothman, R. C. Kwong, M. Hack and J. J. Brown, "High efficiency top-emitting organic light-emitting devices", Appl. Phys. Lett. 81, 3921 (2002).
  2. M.-H. Lu, M. S. Weaver, T. X. Zhou, M. Rothman, R. C. Kwong, M. Hack and J. J. Brown, "Transparent Phosphorescent OLEDs with Long Life", 9th Annual Symposium on Vehicle Displays, paper 1.4, Detroit, MI, Oct. 22-23, 2002.
  3. M.-H. Lu, M. S. Weaver, T. X. Zhou, M. Rothman, R. C. Kwong, M. Hack and J. J. Brown, "Efficient, Long-Lived Organic Light-Emitting Devices with Transparent Cathodes", 2nd SID/MAC OLED Research and Technology Conference, Princeton, NJ, Oct. 11, 2002.
  4. M.-H. Lu, M. S. Weaver, T. X. Zhou, M. Rothman, R. C. Kwong, M. Hack and J. J. Brown, "Highly efficient top-emitting electrophosphorescent organic light-emitting devices", 2nd Int. Meet. Info. Disp., paper 5.2, p. 90,  Daegu, Korea, Aug. 21-23, 2002.
Phosphorescent OLED materials and devices
  1. Brown, J.J.; Chwang, A.; Hack, M.; Kwong, R.; Lu, M.H.; Tung, Y.-J.; Weaver, M.S., "High efficiency phosphorescent OLED technology", Conf Proc Laser Electr Optic Soc Ann Meet, vol. 2, pp. 531-532, Tucson, AZ, Oct. 26, 2003.
  2. R. C. Kwong, M. S. Weaver, M. M. Lu, Y.-T. Tung, A. B. Chwang, T. X. Zhou, M. Hack and J.J. Brown, "Current status of electrophosphorescent device stability," Org. Elect., vol. 4, pp. 155-164, Sep. 2003.
  3. M.-H. Lu, R. Kwong, Y.-J. Tung, A. Chwang, M.S. Weaver, M. Hack and J.J. Brown, "Recent Progress in High-Efficiency Phosphorescent OLED Technology", Electronic Journal 14th FPD Seminar, Tokyo, Japan, June 25, 2003.
  4. Julie J. Brown, Raymond C.  Kwong, Min-Hao M. Lu, Mike Hack, Yeh-Jiun Tung, Michael S. Weaver, Anna B. Chwang, and Theodore X. Zhou, "High Efficiency Phosphorescent OLED Displays", OEL2-1, 9th International Display Workshop, Hiroshima, Japan, Dec. 4-6, 2002.
  5. Y.-J. Tung, R. C. Kwong, A. Chwang, M. Weaver, M. Lu, T. Zhou, M. Hack, and J. Brown, (Invited) "Recent Advances in Electrophosphorescent OLEDs", 2nd SID/MAC OLED Research and Technology Conference, Princeton, NJ, Oct. 11, 2002.
Light outcoupling and microcavity effects in OLEDs
  1. M.-H. Lu and J. C. Sturm, "External coupling and cathode effects in organic light-emitting devices: modeling and experiments", SPIE Proc. 4464, 187 (2002).
  2. M.-H. Lu and J. C. Sturm, "Optimization of External Coupling and Light Emission in Organic Light-Emitting Devices: Modeling and Experiment", J. Appl. Phys. 91, 595 (2002).
  3. M.-H. Lu and J. C. Sturm, "External Coupling Efficiency in Planar Organic Light Emitting Devices", Appl. Phys. Lett. 78, 1927 (2001).
  4. M.-H. Lu, C. F. Madigan, and J. C. Sturm, "Improved External Coupling Efficiency in Organic Light-Emitting Devices on High-Index Substrates", IEDM Tech. Dig. 607 (2000). 
  5. M.-H. Lu, C. F. Madigan, and J. C. Sturm, "Experiment and Modeling of Conversion of Substrate-Waveguided Light to Surface-Emitted Light", MRS Proc. 621, Q3.7 (2000).
  6. C. F. Madigan, M.-H. Lu, and J. C. Sturm, "Improvement of Output Coupling Efficiency of Organic Light Emitting Diodes by Backside Substrate Modification", Appl. Phys. Lett. 76, 1650 (2000).
OLED patterning for full-color displays
  1. K. Long, F.   Pschenitzka, M.-H. Lu, J.C.   Sturm, "Full-Color OLEDs Integrated by Dry Dye Printing", IEEE Trans. Elec. Dev., 53, 2250-2258 (2006).
  2. K. Long, M.-H. Lu, F. Pschenitzka, and J. C. Sturm, "Novel three-color polymer light-emitting devices for passive-matrix flat panel displays", 59th Dev. Res. Conf. Dig., 179 (2001).
  3. F. Pschenitzka, M.-H. Lu, and J. C. Sturm, "Patterning of OLED Cathodes by Metal Dry Etching", SID Dig., 731 (2001).
  4. James C. Sturm, Florian Pschenitzka, T. R. Hebner, Min-Hao Lu, and S. Troian, "Printing approaches for large-area color organic LED displays", Proc. SPIE, Vol. 3797, 266 (1999). 
  5. T. R. Hebner, C. C. Wu, D. Marcy, M. H. Lu, and J. C. Sturm, "Ink-jet printing of doped polymers for organic light emitting devices", Appl. Phys. Lett. 72, 519 (1998).
  6. J. C. Sturm, F. Pschenitzka, T. R. Hebner, M. H. Lu, C. C. Wu, and W. Wilson, "Patterning approaches and system power efficiency considerations for organic LED displays", Proc. SPIE 3476 (1998).
Others
  1. K. A. Killeen, T. R. Hebner, F. Pschenitzka, M.-H. Lu, M. E. Thompson, and J. C. Sturm, "Single-layer polymer-blend organic light emitting diodes", Abs. Pap. Am. Chem. Soc. 216, 583-POLY, Pt. 3 (1998).
  2. A. Tager, M. Lu, M. Moskovits, and J.M. Xu, "SET induced spontaneous charge polarization in coupled nanowire double-junction systems", Phys. Low-Dim. Struct. 12, 149, (1995).
  3. A. Tager, M. Lu, M. Moskovits, and J. M. Xu, "SET induced spontaneous charge polarization in coupled nanowire double-junction systems", Proc. of Intl. Conf. on Physics of Low-Dimensional Structures, O17, (1995).
  4.  A. Tager, M. Lu, M. Moskovits, and J. M. Xu, "Single-electron tunneling in coupled nanowire systems", Ext. Abs. of SSDM'95, 183, (1995).