Y. J. Pu, M. Yoshizaki, T. Akiniwa, K. Nakayama and J. Kido, Dipyrenylpyridines for Electron-Transporting Materials in Organic Light Emitting Devices and Their Structural Effect on Electron Injection From LiF/Al Cathode, Organic Electronics, 10, 877 (2009)

Y. J. Pu, M. Miyamoto, K. Nakayama, T. Oyama, M. Yokoyama and J. Kido, Lithium Phenolate Complexes for an Electron Injection Layer in Organic Light-Emitting Diodes, Organic Electronics, 10, 228 (2009)

Y. J. Li, H. Sasabe, S. J. Su, D. Tanaka, T. Takeda, Y. J. Pu and J. Kido, Phenanthroline Derivatives for Electron-Transport Layer in Organic Light-Emitting Devices, Chemistry Letters, 38, 712 (2009)

T. Kusunoki, K. Nakayama, Y. J. Pu and J. Kido, Mobility Improvement in N-Type Organic FET with Hetero-Layered Structure, Molecular Crystals and Liquid Crystals, 504, 124 (2009)

S. J. Su, Y. Takahashi, T. Chiba, T. Takeda and J. Kido, Structure-Property Relationship of Pyridine-Containing Triphenyl Benzene Electron-Transport Materials for Highly Efficient Blue Phosphorescent OLEDs, Advanced Functional Materials, 19, 1260 (2009)

N. Iguchi, Y. J. Pu, K. I. Nakayama, M. Yokoyama and J. Kido, Synthesis, Photoluminescence and Electroluminescence Properties of Iridium Complexes with Bulky Carbazole Dendrons, Organic Electronics, 10, 465 (2009)

L. X. Xiao, S. J. Su, Y. Agata, H. L. Lan and J. Kido, Nearly 100% Internal Quantum Efficiency in an Organic Blue-Light Electrophosphorescent Device Using a Weak Electron Transporting Material with a Wide Energy Gap, Advanced Materials, 21, 1271 (2009)

J. J. Oh, Y. J. Pu, K. Nakayama and J. Kido, Highly Efficient Organic Light-Emitting Devices Based on a New Yellow Fluorescent Dopant, Journal of Photopolymer Science and Technology, 22, 521 (2009)

H. Sasabe, Y. J. Pu, K. Nakayama and J. Kido, m-Terphenyl-Modified Carbazole Host Material for Highly Efficient Blue and Green PHOLEDs, Chemical Communications, 6655 (2009)

F. Suzuki, K. Nakayama, Y. J. Pu and J. Kido, Current Enhancement in the Vertical-Type Metal-Base Organic Transistors, Molecular Crystals and Liquid Crystals, 504, 133 (2009)