P.S. Wang, I.W. Wu, and C.I. Wu, “Enhancement of current injection in inverted organic light emitting diodes with thermal annealing,” J. Appl. Phys, 108, 103714, 2010
M.H. Chen, Y.J. Lu, C.C. Wu, Y.J. Chang and C.I. Wu, “Effectiveness of tris–(8-Hydroxyquinoline)–aluminum doped with cesium-derivatives in organic light-emitting diodes,” Thin Solid Films, 518, 3942-3944, 2010
M.Y. Liu, C.H. Chang, C.H. Chang, K.H. Tsai, J.S. Huang, C.Y. Chou, I.J. Wang, P.S. Wang, C.Y. Lee, C.H. Chao, C.L. Yeh, C.I. Wu, and C.F. Lin, “Morphological evolution of the poly(3-hexylthiophene)/[6,6]-phenyl-C61-butyric acid methyl ester, oxidation of the silver electrode, and their influences on the performance of inverted polymer solar cells with a sol–gel derived zinc oxide electron select,” Thin Solid Films, 518, 4964-4969, 2010
M.H. Chen, Y.J. Lu, C.C. Wu, Y.J. Chang and C.I. Wu, “Interfacial Reactions and Doping in Organics Light Emitting Diodes Incorporated with Cesium-based Compounds,” Electrochemical and Solid State Letters, 13, H203 – H205, 2010
C.C. Hsu, W.H. Lin, Y.S. Ou, W.B. Su, C.S. Chang, C.I. Wu, and T.T. Tsong, “Effects of electronic confinement and substrate on the low-temperature growth of Pb islands on Si(100)-(2x1) surfaces,” Appl. Surf. Sci., 694, 1, 2010
Y.H. Chen, Y.J. Chang, G.R. Lee, J.H. Chang, I.W. Wu, J.H. Fang, S.H. Hsu, S.W. Liu, C.I. Wu, and T.W. Pi, “Formation of Gap States and Enhanced Current Injection Efficiency in Organic Light Emitting Diodes Incorporated with Subphthalocyanine,” Organic Electronics, 11, 445-449, 2010
I.W. Wu, Y.H. Chen, P.S. Wang, C.G. Wang, S.H. Hsu, and C.I. Wu, “Correlation of Energy Band Alignment and Turn-on Voltage in Organic Light Emitting Diodes,” Appl. Phys. Lett., 96, 013301, 2010
M.H. Chen, Y.R. Lu, C.C. Wu, and C.I. Wu, “Effectiveness of Alq3 Doped with Cesium-Derivatives in Organic Light Emitting Diodes,” accepted for publication at Thin Solid Films, 518, 3942-9344, 2010
M.H. Chen, Y.R. Lu, C.C. Wu, and C.I. Wu, “Interfacial Interactions and Doping in Organics Light-Emitting Diodes Incorporated with Cesium-based Compounds,” accepted for publication at Electrochemical and Solid-State Letters, 107, 053703, 2010
M.H. Tsai, T.H. Ke, H.W. Lin, C.C. Wu, S.F. Chiu, F.C. Fang, Y.L. Liao, K.T. Wong, Y.H. Chen, and C.I. Wu, “Triphenylsilyl- and Trityl-Substituted Carbazole-Based Host Materials for Blue Electrophosphorescence”, Applied Materials and Interfaces,” Applied Materials and Interfaces, 1(3), 567, Feb. 2009
D.S. Leem, S.Y. Kim, J.J. Kim, M.H. Chen, and C.I. Wu, “Rubidium-carbonate-doped 4,7-diphenyl-1,10-phenanthroline electron transporting layer for high-efficiency p-i-n organic light emitting diodes,” Electrochemical and Solid-State Letters, 12, J8 – J10, 2009
Liao, Szu-Hung; Shiu, Jin-Ruei; Liu, Shun-Wei; Yeh, Shi-Jay; Chen, Yu-Hung; Chen, Chin-Ti; Chow, Tahsin; Wu, Chih-I, “Hydroxynaphthyridine-Derived Group III Metal Chelates: Wide Band Gap and Deep Blue Analogues of Green Alq3 (Tris(8-hydroxyquinolate)aluminum) and Their Versatile Applications for Organic Light-Emitting Diodes,” J. Am. Chem. Soc., 131, 763, 2009
C.I. Wu, C.T. Lin, G.R. Lee, T.Y., Cho, C.C. Wu, and T.W. Pi, “Electronic and chemical properties of molybdenum oxide doped hole injection layers in organic light emitting diodes,” J. of Appl. Phys., 105, 033717, 2009
S.Y. Ku, L.C. Chi, W.Y. Hung, S.W. Yang, T.C. Tsai, K.T. Wong, Y.H. Chen, and C.I. Wu, “High-Luminescence Non-Doped Green OLEDs Based on a 9,9-Diarylfluorene-Terminated 2,1,3-Benzothiadiazole Derivative,” J. Mater. Chem., 19, 773, 2009
C.Y. Lin, Y.C. Lin, W.Y. Hung, K.T. Wong, R.C. Kwong, S.C. Xia, Y.H. Chen and C.I. Wu, “A thermally cured 9,9-diarylfluorene-based triaryldiamine polymer displaying high hole mobility and remarkable ambient stability,” J. Mater. Chem., 19, 3618, 2009
M.H. Chen , Y.H. Chen , C.T. Lin , G.R. Lee , C.I. Wu, D.S. Leem , J.J. Kim , T.W. Pi, “Electronic and chemical properties of cathode structures using 4,7-diphenyl-1,10-phenanthroline doped with rubidium carbonate as electron injection layers,” J. Appl. Phys., 105, 113714, 2009
G.R. Lee, Y.H. Chen, C.T. Lin, C.I. Wu, T.W. Pi, C.C. Wu, and K.T. Wong, “Low-temperature Electronic Structures and Intramolecular Interaction of Oligofluorenes Studied by Synchrotron Photoemission Spectroscopy,” Appl. Phys. Lett, 95, 083302, 2009
Y.H. Chen, J.H. Chang, G.R. Lee, I.W. Wu, J.H. Fang, T.W. Pi and C.I. Wu, “Enhancement in Current Efficiency in Organic Light-emitting Diodes with Incorporation of Subphthalocyanine,” Appl. Phys. Lett., 95, 133302, 2009
C. W. Chen and C.I. Wu, “Analytical solution to space charge limited currents with exponentially distributed traps,” J. of Appl. Phys., 104, 123706, 2008
M.H. Chen and C.I. Wu, “The roles of thermally evaporated cesium carbonate to enhance the electron injection in organic light emitting devices,” J of Appl. Phys., 104, 113713, 2008
T.Y. Hwu, T.C. Tsai, W.Y. Hung, S.Y. Chang, Y. Chi, M.H. Chen, C.I. Wu, K.T. Wong and L.C. Chi, “An electron-transporting host material compatible with diverse triplet emitters used for highly efficient red- and green-electrophosphorescent devices,” Chem. Commun., 4956, 2008
Shu-Cheng Chin, Yuan-Chih Chang, Chen-Chih Hsu, Wei-Hsiang Lin, Chih-I Wu, Chia-Seng Chang, Tien T Tsong, Wei-YenWoon, Li-Te Lin and Hun-Jan Tao, “Two-dimensional dopant profiling by electrostatic force microscopy using carbon nanotube modified cantilevers,” Nanotechnology, 19, 325703, 2008
T. C. Chen, C. Y. Peng, C. H. Tseng, M. H. Liao, M. H. Chen, C.I. Wu, M. Y. Chern, P. J. Tzeng, and C. W. Liu, “Characterization of the ultrathin HfO2 and Hf-silicate films grown by atomic layer deposition,” IEEE Tran. Elec. Dev., 54, 759, 2007
W.Y. Hung, T.H. Ke, Y.T. Lin, C.C. Wu, T.H. Hung, T.C. Chao, K.T. Wong, and C.I. Wu, “Employing Ambipolar Oligofluorene as the Charge-Generation Layer in Time-of-Flight Mobility Measurements of Organic Thin Films,” Appl. Phys. Lett, 88, 064102, 2006
M.H. Tsai, H.W. Lin, H.C. Su, T.H. Ke, C.C. Wu, F.C. Fang, Y.L. Liao, K.T. Wong, C.I. Wu, “Highly Efficient Organic Blue Electrophosphorescent Devices Based on 3,6-Bis(triphenylsilyl) Carbazole as the Host Material,” Adv. Mater., 18, 1216, 2006
C.I. Wu, C.T. Lin, Y.H. Chen, M.H. Chen, Y.J. Lu, and C.C. Wu, “Electronic Structures and Electron-Injection Mechanisms of Cesium-Carbonate-Incorporated Cathode Structures for Organic Light-Emitting Devices,” Appl. Phys. Lett, 88, 152104, 2006
J.H. Lee, C.I. Wu, S.W. Liu, C.A. Huang, and Y. Chang, “Mixed Host Organic Light-Emitting Devices with Low Driving Voltage and Long Lifetime,” Appl. Phys. Lett., 86, 103506, 2005
C.I. Wu, C.T. Lin, Y.H. Chen, G.R. Lee, Y.H. Hong, W.G. Liu, C.C. Wu, T.C. Chao and K.T. Wong, “Influences of Substitution on Electronic Structures of Oligofluorenes,” Appl. Phys. Lett, 87, 242107, 2005
C.I. Wu, G.R. Lee, and T.W. Pi, “Energy Structures and Chemical Reactions at Al/LiF/Alq3 Interfaces Studied by Synchrotron-Radiation Photoemission Spectroscopy,” Appl. Phys. Lett., 87, 212108, 2005
C.I. Wu and A. Kahn, A.E. Wickenden, D. Koleske, E.L. Henry, “Aluminum, magnesium, and gold contacts to contamination free n-GaN surfaces,” J. Appl. Phys., 89, 425, 2001
V.M. Bermudez, C.I. Wu and A. Kahn, “AlN films on GaN: Sources of error in the photoemission measurement of electron affinity,” J. Appl. Phys., 89, 1991, 2001
C.I. Wu and A. Kahn, “Negative electron affinity and electron emission at cesiated GaN and AlN surfaces,” Appl. Surf. Sci., 162-163, 250, 2000
C.I. Wu and A. Kahn, “Electronic states at aluminum nitride (0001)-1x1 surfaces,” Appl. Phys. Lett., 74, 546, 1999
C.I. Wu and A. Kahn, “Negative Electron Affinity at the Cs/AlN(0001) surface,” Appl. Phys. Lett., 74, 1433, 1999
T. Chasse, C.I. Wu, I.G. Hill, and A. Kahn, “Band alignment at organic-inorganic semiconductor interfaces: α-NPD and CuPc on InP(110),” J. Appl. Phys., 85, 6589, 1999
C.I. Wu and A. Kahn, “Electronic states and effective negative electron affinity at cesiated p-GaN surfaces,” J. Appl. Phys., 86, 3029, 1999
A. Rajagopal, C.I. Wu and A. Kahn, “Energy level offset at organic semiconductor heterojunctions,” J. Appl. Phys., 83, 2649, 1998
C.I. Wu and A. Kahn, “Investigation of the chemistry and electronic properties of metal/gallium nitride interfaces,” J. Vac. Sci. Technol., B 16, 2218, 1998
C.I. Wu, A. Kahn, E.S. Hellman, D.N.E. Buchanan, “GaN(0001)-(1x1) surfaces: composition and electronic properties,” J. Appl. Phys., 83, 4249, 1998
C.I. Wu and A. Kahn, “Electron affinity at aluminum nitride surfaces,” Appl. Phys. Lett., 73, 1346, 1998
1. Y. Hirose, C.I. Wu, V. Aristov, P. Soukiassian, and A. Kahn, “Chemistry and electronic properties of metal contacts on an organic molecular semiconductor,” Appl. Surf. Sci., 113/114, 291, 1997
C. I. Wu, Y. Hirose, H. Sirringhaus, and A. Kahn, “Electron-hole interaction energy in the organic molecular semiconductor PTCDA,” Chem. Phys. Lett., 272, 43, 1997
C.C. Wu, C.I. Wu, J.C. Sturm, and A. Kahn, “Surface modification of indium tin oxide by plasma treatment: an effective method to improve the efficiency, brightness and reliability of organic light emitting devices,” Appl. Phys. Lett., 70, 1348, 1997
C.T. Lin, C.H. Yeh, M.H. Chen, S.H. Hsu, C.I. Wu, and T.W. Pi, “Influences of evaporation temperature on electronic structures and electrical properties of molybdenum oxide in organic light emitting devices,” accepted for publication at J. Appl. Phys.
Conference & proceeding papers:
C.I. Wu, “Correlation of Energy Band Alignment and Turn on Voltages in Organic Light Emitting Diodes,” SPIE, San Diego, USA, 2010
W.H. Tseng and C.I. Wu, “Electronic and chemical properties of cathode structures using 4,7-diphenyl-1,10-phenanthroline doped with rubidium carbonate as electron injection layers,” 1st Asian Conference on Organic Electronics, Fukuoka, Japan, 2009
M.H. Chen and C.I. Wu, “Comparison of Alg3 doped with cesium-derivatives in organic light emitting diodes,” 1st Asian Conference on Organic Electronics, Fukuoka, Japan, 2009
P.S. Wang and C.I. Wu, “Enhancement of current efficiency in organic light emitting diodes with incorporation of subphthalocyanine,” 1st Asian Conference on Organic Electronics, Fukuoka, Japan, 2009
I.W. Wu and C.I. Wu, “The origins of turn on voltage in organic light emitting diodes,” 1st Asian Conference on Organic Electronics, Fukuoka, Japan, 2009
C.I. Wu, “Correlation of Interfacial Electronic Properties and Transport Properties in Organic Light Emitting Diodes,” SPIE, San Diego, USA, 2009
C.T. Lin and C.I. Wu, “Mechanisms of effective hole injection using MoOx in organic light emitting diodes,” American Physics Society 2008 Annual Meeting, New Orleans, USA, 2008
M.H. Chen and C.I. Wu, “Roles of thermally evaporated cesium oxide in organic light emitting diodes,” American Physics Society 2008 Annual Meeting, New Orleans, USA, 2008
M.H. Chen and C.I. Wu, “Investigations of electron-injection mechanisms and interfacial chemical reactions of Bphen doped with rubidium carbonate in OLEDs,” SPIE Proceeding, San Diego, USA, 2008
C.I. Wu, “Improving the performance of organic light emitting devices via interfacial interactions at electrodes,” Workshop of Organic Microelectronics and Optoelectronics, San Francisco, USA, 2008
C.I. Wu and M.H. Chen, “Interfacial Chemistry and Carrier Transport of Organic Thin Films Doped by Cs2CO3: Interfacial Doping vs. Bulk Doping,” Fall Meeting of Material Research Society, Boston, USA, 2008
C.I. Wu, “The roles of inorganic compounds in organic light emitting devices,” The Fifth International OLED and PLED Workshop, Taipei, Taiwan, 2007
C.T. Lin and C.I. Wu, “Mechanisms of enhanced hole-injection in organic light-emitting devices with MoO3 layers,” International Display Manufacturing Conference, Taipei, Taiwan, 2007
M.H. Chen and C.I. Wu, “The Roles of Thermal Evaporated Cesium Carbonate in Organic Light Emitting Diodes,” International Display Manufacturing Conference, Taipei, Taiwan, 2007
M.H. Chen and C.I. Wu, “Interfacial Influences and Electron-Injection Mechanisms of Tris- (8-Hydroxyquinoline)-Aluminum Doped With Cesium-Derivatives In Organic Light Emitting Devices,” American Vacuum Society 2007 Annual Meeting, Seattle, USA, 2007
C.T. Lin and C.I. Wu, “Mechanisms of enhanced hole-injection in organic light-emitting devices with MoO3 layers,” American Vacuum Society 2007 Annual Meeting, Seattle, USA, 2007
G.R. Lee, C.I. Wu, and T.W. Pi, “Electronics Structures and Interface Chemistry Between LiF and Oligofluorenes,” Physics Annual Meeting, Taipei, Taiwan, 2006
C.I. Wu, “Manipulation of Surface Energy Structures and Electron Transports of Organic Semiconductors with Alkaline Compounds,” Physics Annual Meeting, Taipei, Taiwan, 2006
C.I. Wu, “Substitution and and Dopant Dependence of Electronic Structures and Transport Properties in Organic Semiconductors,” Physics Annual Meeting, Taipei, Taiwan, 2006
Chih-I Wu, Chan-Tin Lin, Yu-Hung Chen, and Chung-Chih Wu, “Interfacial Chemistry and Carrier Transport of Organic Thin Films Doped by Cs2CO3: Interfacial Doping vs. Bulk Doping,” Material Research Society (MRS) Spring Meeting, San Francisco, USA, 2006
Chih-I Wu, Chan-Tin Lin, Yu-Hung Chen, Yun-Hua Hung, Chung-Chih Wu, and Ken-Tsung Wong, “Substitution and Conjugation-Length Dependence of Electronic Structures and Transport Properties in Fluorene-Based Organic Materials,” Material Research Society (MRS) Spring Meeting, San Francisco, USA, 2006
C.I. Wu, “Manipulation of Surface Energy Structures and Electron Transport Properties of Organic Semiconductors,” International Conference of Electroluminescence (ICEL6), Hong Kong, 2006
C.I. Wu, “Substitution and Dopant Dependence of Electronic Structures and Transport Properties in Oligofluorene Thin Films,” International Conference of Electroluminescence (ICEL6), Hong Kong, 2006
C.I. Wu, “Electronic Structures and Interfaces of Organic Semiconductors,” Optics and Photonics Taiwan (OPT 2006), Hsin-Chu, Taiwan, 2006
C.I. Wu and G.R. Lee, “Electronic Structures of Oligofluorenes,” 23屆光譜技術與表面科學研討會, Cha-Yi, Taiwan, 2005
C.I. Wu, “Energy Structures at the Interfaces of Organic Semiconductors,” International Display Manufacturing Conferenc, Taipei, Taiwan, 2005
Ying Zhou, Guanghai Xu, Tracey Scherban, Jihperng Leu, Grant Kloster, and Chih-I Wu, “Correlation of Surface and Film Chemistry with Mechanical Properties in Interconnects,” 2003 International Conference on Characterization and Metrology for ULSI Technology, Austin, Texas (USA), 2003
P. Moon, V. Dubin, S. Johnston, J. Leu, K. Rao, and C.I. Wu, “Process Challenge and Roadmap for Metal Barriers,” International Electron Devices Meeting (IEDM), p.843, 2003
C.I. Wu, S. Johnston, J. Thomas, M. McKeag, J, Leu, and P McGregor, “Electrical Evaluation of PVD, CVD, and ALD Cu Diffusion Barrier,” Intel Process Technology Conference, San Jose, CA, 2002
K.P. O’Brien, P. Moon, C.C. Cheng, V. Dubin, S. Shankar, C.I. Wu, “Via and Trench Shunts for 1266 Cu Metallization,” Intel Process Technology Conference, San Jose, CA, 2002
C.I. Wu and A. Kahn, “Aluminum, Magnesium and Gold Contacts to Contamination Free n-GaN Surfaces,” 10th International Conference on Solid Films and Surfaces (ICSFS-10), Princeton, NJ, 2000
C.I. Wu and A. Kahn, “Negative electron affinity at cesiated p-GaN and AlN surfaces,” 7th International Conference on the Formation of Semiconductor Interfaces (ICFSI), Gothenberg, Sweden, 1999
C.I. Wu and A. Kahn, “Electronic states at GaN(0001)-(1x1) and AlN(0001)-(1x1) surfaces,” 7th International Conference on the Formation of Semiconductor Interfaces (ICFSI), Gothenberg, Sweden, 1999
T. Chasse, C.I. Wu, I.G. Hill, and A. Kahn, “Band alignment at organic-inorganic semiconductor interfaces: NPD and CuPc on InP(110),” 7th International Conference on the Formation of Semiconductor Interfaces (ICFSI), Gothenberg, Sweden, 1999
C.I. Wu and A. Kahn, “Negative electron affinity and electron emission at cesiated GaN and AlN surfaces,” National Symposium of American Vacuum Society (AVS), Seattle, WA, 1999
C.I. Wu and A. Kahn, “Chemistry and electronic properties of metal/GaN interfaces: Al, Ti, Mg, Au, and Pt / p- and n-GaN,” 25th Conference of Physics and Chemistry of Semiconductor Interfaces (PCSI), Salt Lake City, Utah, 1998
C.I. Wu and A. Kahn, “Atomic order and electron affinity at AlN(0001) surfaces,” National Symposium of American Vacuum Society (AVS), Baltimore, MD
, 1998
C.I. Wu and A. Kahn, “Investigation of metal/GaN interface properties using photoemission spectroscopy and I-V measurements,” National Symposium of American Vacuum Society (AVS), Baltimore, MD, 1998
C.I. Wu and A. Kahn, “Negative electron affinity at AlN(0001) surfaces,” Fall Meeting of Material Research Society (MRS), Boston, MA, 1998
T. Chasse, C.I. Wu, I.G. Hill, and A. Kahn, “Organic/Inorganic semiconductor interfaces investigated via ultraviolet photoemission spectroscopy,” Fall Meeting of Material Research Society (MRS), Boston, MA, 1998
C.I. Wu, Y. Hirose, H. Sirringhaus, and A. Kahn, “Correlation effect in an organic molecular semiconductor,” Spring Meeting of Material Research Society (MRS), San Francisco, CA, 1997
C.I. Wu, A. Rajagopal, and A. Kahn, “Electron-hole interaction in the organic molecular semiconductor,” National Symposium of American Vacuum Society (AVS), San Jose, CA, 1997
C.I. Wu and A. Kahn, “Photoemission studies of interfaces between Al, Ti, Mg, and Au and p- and n-GaN,” Fall Meeting of Material Research Society (MRS), Boston, MA, 1997
Books:
Chih-I Wu, “Electronic Properties of GaN and AlN Surfaces and Interfaces,” VDM Publishing House Ltd, Germany, 2009, ISBN:978-3-639-15631-7
Patents:
Chih-I Wu, “SEALING POROUS DIELECTRICS WITH SILANE COUPLING REAGENTS,” US Patent #7,456,490, 2008
Chih-I Wu, “METHOD TO REDUCE THE COPPER LINE ROUGHNESS FOR INCREASED ELECTRICAL CONDUCTIVITY OF NARROW INTERCONNECTS (<100 NM),” US Patent #7,268,075, 2007
Chih-I Wu, “SEALING POROUS DIELECTRICS WITH SILANE COUPLING REAGENTS,” US Patent #7,122,481, 2006
Chih-I Wu, “METHOD OF MAKING A SEMICONDUCTOR DEVICE BY FORMING A MASKING LAYER WITH A TAPERED ETCH PROFILE,” US Patent #6,743,712, 2004
Chih-I Wu, “METHOD FOR IMPROVING NUCLEATION AND ADHESION OF CVD AND ALD FILMS DEPOSITED ONTO LOW-DIELECTRIC-CONSTANT DIELECTRICS,” US Patent #6,605,549, 2003
Chih-I Wu, “A METHOD OF IMPROVING CU ELECTROMIGRATION BY SELECTIVE ATOMIC-LAYER-DEPOSITION,” US Patent
Chih-I Wu, “A METHOD TO IMPROVE ELECTROMIGRATION RESISTANCE AND REDUCE METAL RESISTIVITY BY RAPID LASER ANNEALING,” US Patent
Chih-I Wu, “METHOD TO FABRICATE AMORPHOUS EL CO ALLOYS,” US Patent