Zobrazeno 1 - 10
of 56
pro vyhledávání: '"Yasunari Tamai"'
Publikováno v:
Communications Materials, Vol 3, Iss 1, Pp 1-9 (2022)
A near-infrared to visible photon upconversion device was previously shown to increase external quantum efficiency by up to 2.3%. Here, the upconversion mechanism is studied by time-resolved spectroscopy, revealing that 67% of incident photons are ut
Externí odkaz:
https://doaj.org/article/c61c32cb94364fcba0600bd3b5a09959
Autor:
Yasunari Tamai
Publikováno v:
Advanced Energy & Sustainability Research, Vol 4, Iss 1, Pp n/a-n/a (2023)
The power conversion efficiency (PCE) of organic solar cells (OSCs) is improved dramatically in recent years and now approaches >19% for single‐junction cells and >20% for tandem cells. Therefore, the practical use of OSCs is becoming a reality. Th
Externí odkaz:
https://doaj.org/article/7ffa392b8a644a43a80215f1f83c3592
Autor:
Yasunari Tamai
Publikováno v:
Aggregate, Vol 3, Iss 6, Pp n/a-n/a (2022)
Abstract The power conversion efficiencies of organic solar cells (OSCs) have routinely lagged far behind those of their inorganic counterparts. However, owing to the enormous contributions of many researchers, the power conversion efficiencies of OS
Externí odkaz:
https://doaj.org/article/36ea7ad89eb94145a313c1715181027d
Publikováno v:
Polymer Journal. 54(11):1345-1353
Suppressing nonradiative deactivation of charge transfer (CT) states is pivotal to realizing further improvements in the power conversion efficiencies of polymer solar cells (PSCs). According to the energy gap law, the nonradiative decay rate constan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c56f2b767bb5be21285a3ee807539be2
http://hdl.handle.net/2433/276638
http://hdl.handle.net/2433/276638
Autor:
Toshiharu Saito, Shin-ichiro Natsuda, Rei Shirouchi, Kenta Imakita, Kazuki Kohzuki, Yasunari Tamai
Publikováno v:
physica status solidi (a).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4e21bac48f66f338ac455e994221af54
https://doi.org/10.1002/pssa.202300121
https://doi.org/10.1002/pssa.202300121
The trade-off between the short-circuit current density (JSC) and open-circuit voltage (VOC) has been one of the largest challenges in improving the power conversion efficiencies (PCEs) of organic solar cells (OSCs). Although energy offset between th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::254f4cc8b5de8c6b70d7e5dbeb648207
https://doi.org/10.26434/chemrxiv-2023-z2gg3
https://doi.org/10.26434/chemrxiv-2023-z2gg3
Autor:
Yasuhiro Murata, Yasunari Tamai
Publikováno v:
The Journal of Physical Chemistry Letters. 13(9):2078-2083
Understanding exciton diffusion properties in organic semiconductor films is crucial for organic solar cells because excitons need to diffuse to an electron donor/acceptor interface to dissociate into charges. We previously found that singlet exciton
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd1dae51cc4e847a321c1951dac89e70
http://hdl.handle.net/2433/269397
http://hdl.handle.net/2433/269397
Autor:
Yuji Sakamoto, Rei Shirouchi, Taiki Takeyama, Shin-ichiro Natsuda, Toshiharu Saito, Hideo Ohkita, Yasunari Tamai
Publikováno v:
Energy & Environmental Science. 15:1545-1555
Recent studies have shown that efficient free carrier (FC) generation with a small voltage loss can be achieved in organic solar cells (OSCs); however, the photophysical insights underpinning this remain unclear. Herein, we examined the mechanisms un
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2eb7b3da7256046d5ab405dccc59712f
https://doi.org/10.1039/d1ee03565g
https://doi.org/10.1039/d1ee03565g
Autor:
Yasunari Tamai
Publikováno v:
Aggregate. 3
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fafa59d8fcdcc22902e576df5fe1fde
https://doi.org/10.1002/agt2.86
https://doi.org/10.1002/agt2.86
Autor:
Tomoyuki Koganezawa, Tomokazu Umeyama, Yuji Sakamoto, Keiichi Ishida, Taiki Takeyama, Kensho Igarashi, Shunsuke Ohtani, Kosaku Kato, Yasunari Tamai, Kazuo Tanaka, Tatsuho Wada, Akira Yamakata, Hiroshi Imahori, Hideo Ohkita
Publikováno v:
ACS Applied Energy Materials. 4:14022-14033
Terminal-group halogenation is an effective strategy for tuning energy levels, improving light-harvesting ability, and enhancing the intermolecular stacking of nonfullerene acceptors (NFAs) for org...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ada01be261d5ea215e91c9bc5c4f6d37
https://doi.org/10.1021/acsaem.1c02816
https://doi.org/10.1021/acsaem.1c02816