Dr. Hidefumi Akiyama Profile

Dr. Hidefumi Akiyama

at Univ of Tokyo

SPIE Involvement:

Author

Publications (9)

Proceedings Article | 27 February 2019 Paper

A concept of nonequilibrium solar cell heat recovery solar cell

Kenji Kamide, Toshimitsu Mochizuki, Hidefumi Akiyama, Hidetaka Takato

Proceedings Volume 10913, 1091316 (2019) https://doi.org/10.1117/12.2505922

KEYWORDS: Solar cells, Silicon, Solar energy, Electrodes, Absorption, Sun, Photons, Electrons, Gallium arsenide, Thermoelectric materials

Read Abstract +

Proceedings Article | 27 February 2019 Paper

Monitoring carrier transport and recombination in photovoltaic devices in real time

Y. Hazama, Y. Ishida, L. Zhu, C. Kim, S. Shin, H. Akiyama

Proceedings Volume 10913, 109130Y (2019) https://doi.org/10.1117/12.2507736

KEYWORDS: Solar cells, Photoemission spectroscopy, Photovoltaics, Solar energy

Read Abstract +

Proceedings Article | 23 February 2017 Paper

Exciton Mott transition in GaAs studied by terahertz spectroscopy

Fumiya Sekiguchi, Changsu Kim, Hidefumi Akiyama, Ryo Shimano

Proceedings Volume 10102, 101020T (2017) https://doi.org/10.1117/12.2250735

KEYWORDS: Excitons, Transition metals, Terahertz radiation, Spectroscopy, Gallium arsenide, Terahertz spectroscopy, Semiconductors, Plasma, Picosecond phenomena, Ionization

Read Abstract +

Proceedings Article | 14 March 2016 Paper

Calibration standards and measurement accuracy of absolute electroluminescence and internal properties in multi-junction and arrayed solar cells

Masahiro Yoshita, Lin Zhu, Changsu Kim, Toshimitsu Mochizuki, Tetsuya Nakamura, Mitsuru Imaizumi, Shaoqiang Chen, Hidehiro Kubota, Yoshihiko Kanemitsu, Hidefumi Akiyama

Proceedings Volume 9743, 97430D (2016) https://doi.org/10.1117/12.2211726

KEYWORDS: Electroluminescence, Calibration, Solar cells, Imaging systems, Photovoltaics, Multijunction solar cells, Reliability, Silicon, Standards development, Photodiodes, Light emitting diodes, Gallium arsenide, Cameras, Indium gallium phosphide

Read Abstract +

Proceedings Article | 14 March 2016 Paper

Characterization and modeling of radiation damages via internal radiative efficiency in multi-junction solar cells

Lin Zhu, Masahiro Yoshita, Tetsuya Nakamura, Mitsuru Imaizumi, Changsu Kim, Toshimitsu Mochizuki, Shaoqiang Chen, Yoshihiko Kanemitsu, Hidefumi Akiyama

Proceedings Volume 9743, 97430U (2016) https://doi.org/10.1117/12.2212827

KEYWORDS: Solar cells, Solar radiation models, Radiation effects, Photovoltaics, Electroluminescence, Particles, Multijunction solar cells, Group III-V semiconductors, Photonics, Indium gallium phosphide, Gallium arsenide, External quantum efficiency, Calibration, Energy efficiency

Read Abstract +

Proceedings Article | 16 March 2015 Paper

Multi-junction-solar-cell designs and characterizations based on detailed-balance principle and luminescence yields

Hidefumi Akiyama, Lin Zhu, Masahiro Yoshita, Changsu Kim, Shaoqiang Chen, Toshimitsu Mochizuki, Yoshihiko Kanemitsu

Proceedings Volume 9358, 93580B (2015) https://doi.org/10.1117/12.2175825

KEYWORDS: Luminescence, Quantum efficiency, Electroluminescence, Solar energy, Solar cells, Multijunction solar cells, Tandem solar cells, Light emitting diodes, External quantum efficiency, Satellites

Read Abstract +

Proceedings Article | 14 March 2015 Paper

Time-resolved observation of excitonic dynamics under coherent terahertz excitation in GaAs quantum wells

K. Uchida, H. Hirori, T. Aoki, C. Wolpert, K. Tanaka, T. Mochizuki, C. Kim, M. Yoshita, H. Akiyama, L. Pfeiffer, K. West

Proceedings Volume 9361, 93611G (2015) https://doi.org/10.1117/12.2078419

KEYWORDS: Gallium arsenide, Quantum wells, Terahertz radiation, Excitons, Optical spectroscopy, Spectroscopy, Modulation, Time metrology, Picosecond phenomena, Ionization

Read Abstract +

Proceedings Article | 15 March 2013 Paper

High-power THz pulse generation and nonlinear THz spectroscopy

K. Shinokita, H. Hirori, K. Tanaka, T. Mochizuki, C. Kim, H. Akiyama, L. Pfeiffer, K. West

Proceedings Volume 8604, 86040B (2013) https://doi.org/10.1117/12.2008309

KEYWORDS: Terahertz radiation, Quantum wells, Continuous wave operation, Pulsed laser operation, Visible radiation, Luminescence, Solids, Spectroscopy, Excitons, Streak cameras

Read Abstract +

Proceedings Article | 12 September 2003 Paper

Application to processing system using intra-molecular BRET

Tomomi Otsuji, Emiko Okuda-Ashitaka, Satoshi Kojima, Hidehumi Akiyama, Seiji Ito, Yoshihiro Ohmiya

Proceedings Volume 4967, (2003) https://doi.org/10.1117/12.477879

KEYWORDS: Green fluorescent protein, Proteins, Bioluminescence, Luminescence, Receptors, Resonance energy transfer, Gallium arsenide, Energy transfer, Simulation of CCA and DLA aggregates, Dynamical systems

Read Abstract +

Showing 5 of 9 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years