Daisuke Yokoyama
Daisuke Yokoyama
確認したメール アドレス: yz.yamagata-u.ac.jp
Thermally Activated Delayed Fluorescence from Sn4+–Porphyrin Complexes and Their Application to Organic Light Emitting Diodes — A Novel Mechanism for …
A Endo, M Ogasawara, A Takahashi, D Yokoyama, Y Kato, C Adachi
Advanced Materials 21 (47), 4802-4806, 2009
Molecular orientation in small-molecule organic light-emitting diodes
D Yokoyama
Journal of Materials Chemistry 21 (48), 19187-19202, 2011
Horizontal orientation of linear-shaped organic molecules having bulky substituents in neat and doped vacuum-deposited amorphous films
D Yokoyama, A Sakaguchi, M Suzuki, C Adachi
Organic Electronics 10 (1), 127-137, 2009
Increased light outcoupling efficiency in dye-doped small molecule organic light-emitting diodes with horizontally oriented emitters
J Frischeisen, D Yokoyama, A Endo, C Adachi, W Brütting
Organic electronics 12 (5), 809-817, 2011
Determination of molecular dipole orientation in doped fluorescent organic thin films by photoluminescence measurements
J Frischeisen, D Yokoyama, C Adachi, W Brütting
Applied Physics Letters 96 (7), 29, 2010
Horizontal molecular orientation in vacuum-deposited organic amorphous films of hole and electron transport materials
D Yokoyama, A Sakaguchi, M Suzuki, C Adachi
Applied Physics Letters 93 (17), 394, 2008
Molecular Stacking Induced by Intermolecular C–H··· N Hydrogen Bonds Leading to High Carrier Mobility in Vacuum‐Deposited Organic Films
D Yokoyama, H Sasabe, Y Furukawa, C Adachi, J Kido
Advanced Functional Materials 21 (8), 1375-1382, 2011
Orientation control of linear‐shaped molecules in vacuum‐deposited organic amorphous films and its effect on carrier mobilities
D Yokoyama, Y Setoguchi, A Sakaguchi, M Suzuki, C Adachi
Advanced Functional Materials 20 (3), 386-391, 2010
Optimizing the charge balance of fluorescent organic light‐emitting devices to achieve high external quantum efficiency beyond the conventional upper limit
YJ Pu, G Nakata, F Satoh, H Sasabe, D Yokoyama, J Kido
Advanced Materials 24 (13), 1765-1770, 2012
Influence of substituted pyridine rings on physical properties and electron mobilities of 2‐methylpyrimidine skeleton‐based electron transporters
H Sasabe, D Tanaka, D Yokoyama, T Chiba, YJ Pu, K Nakayama, ...
Advanced Functional Materials 21 (2), 336-342, 2011
Advantages and disadvantages of vacuum-deposited and spin-coated amorphous organic semiconductor films for organic light-emitting diodes
M Shibata, Y Sakai, D Yokoyama
Journal of Materials Chemistry C 3 (42), 11178-11191, 2015
Synthesis and electroluminescence properties of highly efficient blue fluorescence emitters using dual core chromophores
B Kim, Y Park, J Lee, D Yokoyama, JH Lee, J Kido, J Park
Journal of Materials Chemistry C 1 (3), 432-440, 2013
Organic photoelectric conversion device and stack type photoelectric conversion device
D Yokoyama
US Patent App. 11/513,046, 2007
Dual efficiency enhancement by delayed fluorescence and dipole orientation in high-efficiency fluorescent organic light-emitting diodes
D Yokoyama, Y Park, B Kim, S Kim, YJ Pu, J Kido, J Park
Applied Physics Letters 99 (12), 204, 2011
Horizontally orientated sticklike emitters: enhancement of intrinsic out-coupling factor and electroluminescence performance
M Liu, R Komatsu, X Cai, K Hotta, S Sato, K Liu, D Chen, Y Kato, ...
Chemistry of Materials 29 (20), 8630-8636, 2017
Enhancement of electron transport by horizontal molecular orientation of oxadiazole planar molecules in organic amorphous films
D Yokoyama, A Sakaguchi, M Suzuki, C Adachi
Applied Physics Letters 95 (24), 324, 2009
High-efficiency simple planar heterojunction organic thin-film photovoltaics with horizontally oriented amorphous donors
D Yokoyama, ZQ Wang, YJ Pu, K Kobayashi, J Kido, Z Hong
Solar energy materials and solar cells 98, 472-475, 2012
In situ real-time spectroscopic ellipsometry measurement for the investigation of molecular orientation in organic amorphous multilayer structures
D Yokoyama, C Adachi
Journal of Applied Physics 107 (12), 123512, 2010
Optical and electrical properties of a squaraine dye in photovoltaic cells
G Chen, D Yokoyama, H Sasabe, Z Hong, Y Yang, J Kido
Applied Physics Letters 101 (8), 083904, 2012
Thermally activated delayed fluorescence OLEDs with fully solution processed organic layers exhibiting nearly 10% external quantum efficiency
K Albrecht, K Matsuoka, D Yokoyama, Y Sakai, A Nakayama, K Fujita, ...
Chemical Communications 53 (16), 2439-2442, 2017
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