Hiroyuki Okada

Article

Alignment of liquid crystals with 200 nm-sized V-shaped groove structure fabricated by nano-imprint lithography

Haruna, K. & Okada, H., 2019/07/15, In: Journal of Molecular Liquids. 286, 110830.

Research output: Contribution to journal › Article › peer-review

A millimeter-wave quasi-optical grid phase shifter using liquid crystal

Nozokido, T., Maede, S., Miyasaka, N., Okada, H., Nose, T. & Murai, T., 2010/01/25, In: IEICE Electronics Express. 7, 2, p. 67-72 6 p.

Research output: Contribution to journal › Article › peer-review

Open Access

10 Scopus citations

Annealing effect of E-beam evaporated TiO₂ films and their performance in perovskite solar cells

Hossain, M. F., Naka, S. & Okada, H., 2018/06/01, In: Journal of Photochemistry and Photobiology A: Chemistry. 360, p. 109-116 8 p.

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Basic study on linear optical quantum computers with liquid crystal devices

Yokotsuka, S. & Okada, H., 2024/02/29, In: Japanese Journal of Applied Physics. 63, 2, 02SP07.

Research output: Contribution to journal › Article › peer-review

Open Access

4 Scopus citations

Bi-functional electroluminescent and photovoltaic devices based on rubrene-doped poly(3-hexylthiophene):1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6) C61 blends

Lou, Y., Wang, Z., Naka, S. & Okada, H., 2012/03, In: Synthetic Metals. 162, 3-4, p. 281-284 4 p.

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Charge transport characteristics in P3HT:PCBM organic blends under illumination: Influence of metal work functions

Lou, Y., Wang, Z., Naka, S. & Okada, H., 2012/03/09, In: Chemical Physics Letters. 529, p. 64-68 5 p.

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Direct comparison of charge transport and electronic traps in polymer-fullerene blends under dark and illuminated conditions

Lou, Y. H., Zhang, L., Xu, M. F., Wang, Z. K., Naka, S., Okada, H. & Liao, L. S., 2014/01, In: Organic Electronics. 15, 1, p. 299-305 7 p.

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Dual roles of MoO₃-doped pentacene thin films as hole-extraction and multicharge-separation functions in pentacene/C₆₀ heterojunction organic solar cells

Lou, Y. H., Xu, M. F., Wang, Z. K., Naka, S., Okada, H. & Liao, L. S., 2013/03/18, In: Applied Physics Letters. 102, 11, 113305.

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Efficient electron transport in 4,4′-bis[N-(1-napthyl)-N-phenyl- amino] biphenyl and the applications in white organic light emitting devices

Lou, Y., Okawa, Y., Wang, Z., Naka, S. & Okada, H., 2013/03, In: Organic Electronics. 14, 3, p. 1015-1020 6 p.

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Electrical properties of organic electroluminescent devices with aluminium alloy cathode

Naka, S., Tamekawa, M., Terashita, T., Okada, H., Anada, H. & Onnagawa, H., 1997/12, In: Synthetic Metals. 91, 1-3, p. 129-130 2 p.

Research output: Contribution to journal › Article › peer-review

53 Scopus citations

Electroluminescence of a bichromophoric molecule with a benzoxyazolylcoumarin and carbazole moiety

Izumizawa, T., Uchida, M., Furukawa, K., Naka, S., Okada, H. & Onnagawa, H., 1997/07, In: Polymers for Advanced Technologies. 8, 7, p. 449-453 5 p.

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Enhancement of electron injection in organic light-emitting diodes with photosensitive charge generation layer

Okawa, Y., Naka, S. & Okada, H., 2011/01, In: Japanese Journal of Applied Physics. 50, 1 PART 3, 01BC11.

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Evaluation of single photon-emission in a small area for organic light-emitting diodes

Azuma, K. & Okada, H., 2024/01/01, In: Japanese Journal of Applied Physics. 63, 1, 01SP27.

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Evaluation of uniformity for organic film evaporation using two dimensional different apertures

Kamimura, Y., Okada, H. & Naka, S., 2013, In: Vacuum. 92, p. 26-31 6 p.

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Fabrication of perovskite solar cells with ZnO nanostructures prepared on seedless ITO substrate

Hossain, M. F., Naka, S. & Okada, H., 2018/08/01, In: Journal of Materials Science: Materials in Electronics. 29, 16, p. 13864-13871 8 p.

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Fully logical NOT operation of self-aligned liquid crystal optical control devices with two-slit Young’s interference experiment

Watanabe, T. & Okada, H., 2024, In: Liquid Crystals. 51, 11, p. 1926-1932 7 p.

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

High efficiency rubrene based inverted top-emission organic light emitting devices with a mixed single layer

Wang, Z., Lou, Y., Naka, S. & Okada, H., 2010/07, In: Journal of Luminescence. 130, 7, p. 1198-1202 5 p.

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

High electron mobility in bathophenanthroline

Naka, S., Okada, H., Onnagawa, H. & Tsutsui, T., 2000/01/10, In: Applied Physics Letters. 76, 2, p. 197-199 3 p.

Research output: Contribution to journal › Article › peer-review

314 Scopus citations

Improved performance of mixed single layer top-emission organic light emitting devices using capping layer

Wang, Z., Naka, S. & Okada, H., 2011/02, In: Solid-State Electronics. 56, 1, p. 155-158 4 p.

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Improved photostability of metal halide perovskites by microstructure modulation for photovoltaic application

Zhang, C. C., Yuan, S., Wang, K. L., Wang, Z. K. & Okada, H., 2022/02, In: Organic Electronics. 101, 106380.

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Improved white organic electroluminescent devices using fine mesh as an evaporation mask

Tsuji, T., Naka, S., Okada, H. & Onnagawa, H., 2005/01, In: Current Applied Physics. 5, 1, p. 1-4 4 p.

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Improvement of roll-off in power efficiency for mixed single layer organic light emitting devices by co-doping

Lou, Y., Geng, Z., Wang, Z., Naka, S. & Okada, H., 2012/08, In: Synthetic Metals. 162, 13-14, p. 1204-1209 6 p.

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Influence of ITO patterning on reliability of organic light emitting devices

Wang, Z., Naka, S. & Okada, H., 2009/11/30, In: Thin Solid Films. 518, 2, p. 497-500 4 p.

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Interfacial degradation effects of aqueous solution-processed molybdenum trioxides on the stability of organic solar cells evaluated by a differential method

Lou, Y. H., Wang, Z. K., Yuan, D. X., Okada, H. & Liao, L. S., 2014/09/15, In: Applied Physics Letters. 105, 11, 113301.

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Light-emitting seal using self-aligned organic light-emitting structure

Ohmori, M., Ueno, S., Kurachi, N., Sawamura, M., Hattori, M., Inoue, T., Miyabayashl, T., Takao, Y., Hibino, S., Tsuchiya, I., Bessho, H., Ohara, K., Ohama, M., Hoshino, M., Ayukawa, S., Miyasato, R., Tsutsui, N., Miura, N., Yamanaka, M. & Naka, S. & 2 others, Shibata, M. & Okada, H., 2008/01/22, In: Japanese Journal of Applied Physics. 47, 1 PART 2, p. 472-475 4 p.

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Macrocyclic and acyclic bis(2,5-diphenyl-1,3,4-oxadiazole)s with electron-transporting and hole-blocking ability in organic electroluminescent devices

Ono, K., Ezaka, S., Higashibata, A., Hosokawa, R., Ohkita, M., Saito, K., Suto, M., Tomura, M., Matsushita, Y., Naka, S., Okada, H. & Onnagawa, H., 2005/08/05, In: Macromolecular Chemistry and Physics. 206, 15, p. 1576-1582 7 p.

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Mobility enhancement of top contact pentacene based organic thin film transistor with bi-layer GeO/Au electrodes

Waqas Alam, M., Wang, Z., Naka, S. & Okada, H., 2013/02/11, In: Applied Physics Letters. 102, 6, 061105.

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Numerical quantization of interfering photons using liquid crystal retarder

Okada, H., 2024/01/01, In: Japanese Journal of Applied Physics. 63, 1, 01SP34.

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Optimization of measurement in self-aligned liquid crystal optical control devices with two-slit Young's experiment

Watanabe, T. & Okada, H., 2024/02/29, In: Japanese Journal of Applied Physics. 63, 2, 02SP03.

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Organic electrophosphorescent devices with mixed hole transport material as emission layer

Matsushima, H., Naka, S., Okada, H. & Onnagawa, H., 2005/05, In: Current Applied Physics. 5, 4, p. 305-308 4 p.

Research output: Contribution to journal › Article › peer-review

52 Scopus citations

Organic thin-film transistors with bilayer of rubbed and evaporated hydrocarbon-based acene as active layer

Funada, S., Shaari, S., Naka, S. & Okada, H., 2017/03/15, In: Materials Science in Semiconductor Processing. 60, p. 1-4 4 p.

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Organic thin-film transistors with tailored liquid sources of HfO ₂ as a high-κ insulator

Nishizawa, R., Naka, S., Okada, H., Suzuki, K. & Kato, K., 2010/04, In: Japanese Journal of Applied Physics. 49, 4 PART 2, 04DK08.

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Origin of enhanced electrical and conducting properties in pentacene films doped by molybdenum trioxide

Lou, Y. H., Xu, M. F., Zhang, L., Wang, Z. K., Naka, S., Okada, H. & Liao, L. S., 2013, In: Organic Electronics. 14, 10, p. 2698-2704 7 p.

Research output: Contribution to journal › Article › peer-review

57 Scopus citations

Packing and thin-film structures of 5,7,12,14-tetra(α-alkylthienylethyl)pentacenes

Makino, H., Sato, S., Yoshino, J., Hayashi, N. & Okada, H., 2019, In: Heterocycles. 99, 2, p. 1154-1169 16 p.

Research output: Contribution to journal › Article › peer-review

Open Access

1 Scopus citations

Perovskite Films with Reduced Interfacial Strains via a Molecular-Level Flexible Interlayer for Photovoltaic Application

Zhang, C. C., Yuan, S., Lou, Y. H., Liu, Q. W., Li, M., Okada, H. & Wang, Z. K., 2020/09/01, In: Advanced Materials. 32, 38, 2001479.

Research output: Contribution to journal › Article › peer-review

158 Scopus citations

Quantum optical control experiment using Mach-Zehnder interferometer and twisted nematic liquid crystals

Terazawa, A., Yokotsuka, S. & Okada, H., 2024/01/01, In: Japanese Journal of Applied Physics. 63, 1, 01SP39.

Research output: Contribution to journal › Article › peer-review

Open Access

4 Scopus citations

Solution-processed small organic electrophosphorescent devices with arylamine polymer buffer layer

Hirano, K., Naka, S., Okada, H., Onnagawa, H., Nakai, T. & Sato, H., 2006, In: Journal of Photopolymer Science and Technology. 19, 2, p. 177-180 4 p.

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Synthesis and electroluminescence properties of fac-tris(2-phenylpyridine)- iridium derivatives containing hole-trapping moieties

Ono, K., Joho, M., Saito, K., Tomura, M., Matsushita, Y., Naka, S., Okada, H. & Onnagawa, H., 2006/09/18, In: European Journal of Inorganic Chemistry. 18, p. 3676-3683 8 p.

Research output: Contribution to journal › Article › peer-review

64 Scopus citations

Temperature characteristic of permittivity and splay elastic constant for fluorinated liquid crystal mixtures

Ma, H., Xu, J., Okada, H., Onnagawa, H., Sugimori, S. & Toriyama, K., 2013/07, In: Current Applied Physics. 13, 5, p. 814-818 5 p.

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Temperature dependence of carrier injection in small molecular organic light emitting device with a mixed single layer

Wang, Z., Lou, Y., Naka, S. & Okada, H., 2010/12/06, In: Chemical Physics Letters. 501, 1-3, p. 75-79 5 p.

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Young’s interference experiment using self-aligned liquid crystal optical control devices

Watanabe, T. & Okada, H., 2023, In: Liquid Crystals. 50, 4, p. 691-699 9 p.

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Comment/debate

Erratum: Efficient electron transport in 4,4′-bis[N-(1-napthyl)-N- phenyl-amino] biphenyl and the applications in white organic light emitting devices (Organic Electronics: physics, materials, applications (2013) 14 (1015-1020))

Lou, Y., Okawa, Y., Wang, Z., Naka, S. & Okada, H., 2013/06, In: Organic Electronics. 14, 6, p. 1693 1 p.

Research output: Contribution to journal › Comment/debate

Conference article

Carrier transport properties of organic materials for EL device operation

Naka, S., Okada, H., Onnagawa, H., Yamaguchi, Y. & Tsutsui, T., 2000/06/01, In: Synthetic Metals. 111, p. 331-333 3 p.

Research output: Contribution to journal › Conference article › peer-review

240 Scopus citations

Conference contribution

Advanced Optical Quantum Computing Using Liquid Crystal Devices

Okada, H., Watanabe, T., Yokotsuka, S. & Terazawa, A., 2024, PEEIACON 2024 - International Conference on Power, Electrical, Electronics and Industrial Applications. Institute of Electrical and Electronics Engineers Inc., p. 1020-1025 6 p. (PEEIACON 2024 - International Conference on Power, Electrical, Electronics and Industrial Applications).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Analysis of Liquid Crystal Optical Switching Devices Aimed at Quantum Computing

Okada, H., 2024, 2024 31st International Workshop on Active-Matrix Flatpanel Displays and Devices, AM-FPD 2024. Institute of Electrical and Electronics Engineers Inc., p. 165-168 4 p. (2024 31st International Workshop on Active-Matrix Flatpanel Displays and Devices, AM-FPD 2024).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Design, Modeling and Fabrication of a Symmetric Multilevel Inverter with Optimized Damping Resistor for the Solar Powered Renewable Energy Applications

Biswas, M. M. R., Hossain, T., Hasan, M. M., Hossain, M. S., Hossain, M. F. & Okada, H., 2024, PEEIACON 2024 - International Conference on Power, Electrical, Electronics and Industrial Applications. Institute of Electrical and Electronics Engineers Inc., p. 591-594 4 p. (PEEIACON 2024 - International Conference on Power, Electrical, Electronics and Industrial Applications).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Fabrication of Perovskite Solar Cells with E-beam Evaporation TiO₂Thin films: Considering Substrate Heater

Hossain, M. F., Naka, S. & Okada, H., 2018/08/15, AM-FPD 2018 - 25th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings. Institute of Electrical and Electronics Engineers Inc., 8437395. (AM-FPD 2018 - 25th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Investigation of photovoltaic performance of perovskite solar cells with α-npd and electron-beam evaporated tio2 photoelectrode

Hossain, M. F., Okada, H. & Naka, S., 2017/08/08, AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings. Institute of Electrical and Electronics Engineers Inc., p. 219-222 4 p. 8006128. (AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Review article

Optical quantum computing using liquid crystal devices

Okada, H., Watanabe, T., Yokotsuka, S. & Terazawa, A., 2024, In: Molecular Crystals and Liquid Crystals. 768, 7, p. 59-90 32 p.

Research output: Contribution to journal › Review article › peer-review

1 Scopus citations

Physical Fields Manipulation for High-Performance Perovskite Photovoltaics

Zhang, C. C., Yuan, S., Lou, Y. H., Okada, H. & Wang, Z. K., 2022/04/21, In: Small. 18, 16, 2107556.

Research output: Contribution to journal › Review article › peer-review

12 Scopus citations

Hiroyuki Okada

Research output

Search results