Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Riku Okumura"'
Autor:
Iori Ono, Takeo Oku, Yuto Genko, Riku Okumura, Taiga Nasu, Shinichiro Mizuno, Tomoharu Tachikawa, Tomoya Hasegawa, Sakiko Fukunishi
Publikováno v:
Chemistry of Inorganic Materials, Vol 4, Iss , Pp 100066- (2024)
Stable decaphenylcyclopentasilane (DPPS) hole transport layers were developed for guanidinium-, formamidinium-, or ethylammonium-added double-stacked CH3NH3PbI3 perovskite photovoltaic devices without using 2,2′,7,7′-tetrakis (N,N-di-p-methoxyphe
Externí odkaz:
https://doaj.org/article/a36b2b83b7354987914b4540ae13146c
Autor:
Haruto Shimada, Takeo Oku, Iori Ono, Riku Okumura, Keisuke Kuroyanagi, Atsushi Suzuki, Tomoharu Tachikawa, Tomoya Hasegawa, Sakiko Fukunishi
Publikováno v:
Hybrid Advances, Vol 6, Iss , Pp 100252- (2024)
Effects of substitution of halogen anions and addition of alkali metal cations for guanidinium (GA)-ethylammonium (EA) hybrid-doped perovskite solar cells were investigated by fabricating devices and comparing their photovoltaic properties. The halog
Externí odkaz:
https://doaj.org/article/080eaeaa1a534659aef0467dd42068da
Publikováno v:
Chemistry of Inorganic Materials, Vol 3, Iss , Pp 100052- (2024)
Additions of copper iodide (CuI), rubidium iodide, or cesium iodide to perovskite precursor solutions accelerated the formation of the photoactive α-phase of formamidinium lead triiodide (FAPbI3) perovskite crystals. In particular, the addition of C
Externí odkaz:
https://doaj.org/article/086e009b4dbe43c7a3d6ff781cca0158
Publikováno v:
Chemical Physics Impact, Vol 8, Iss , Pp 100534- (2024)
A study was performed on the electronic structures and properties of perovskite compounds with the chemical formula ABX3 and the monovalent copper ion (Cu+) as the A-site cation. Most Cu+-based perovskite chlorides (CuMCl3, where M denotes an element
Externí odkaz:
https://doaj.org/article/8772b29dc1f144789adf58597c497219
Autor:
Kotaro Yamamoto, Atsushi Suzuki, Riku Okumura, Ayu Enomoto, Iori Ono, Takeo Oku, Sakiko Fukunishi, Tomoharu Tachikawa, Tomoya Hasegawa
Publikováno v:
Results in Surfaces and Interfaces, Vol 15, Iss , Pp 100224- (2024)
Perovskite solar cells have attained high photoconversion efficiencies by changing chemical compositions of the perovskites and layered structures of the devices. However, the perovskite compounds easily decompose in air atmosphere even at the room t
Externí odkaz:
https://doaj.org/article/7d60742c9da2482fbea064b2cf772abd
Publikováno v:
Hybrid Advances, Vol 5, Iss , Pp 100174- (2024)
Although CH3NH3PbI3-based perovskite compounds have excellent photovoltaic properties, the lead (Pb) is harmful to the environment, and Pb-free perovskite compounds are needed for next generation solar cells. Theoretical calculations could be one of
Externí odkaz:
https://doaj.org/article/6188c864c05b43139c79bbce89e214a7
Autor:
Riku Okumura, Takeo Oku, Atsushi Suzuki, Sakiko Fukunishi, Tomoharu Tachikawa, Tomoya Hasegawa
Publikováno v:
Engineering Proceedings, Vol 56, Iss 1, p 47 (2023)
The addition of copper bromide to the perovskite precursor solutions increased the conversion efficiencies of the devices. On the other hand, the short-circuit current densities decreased with an increase in the added amounts of copper (Cu). From fir
Externí odkaz:
https://doaj.org/article/d482e89acb9242e5b0da9fd013754b53
Autor:
Takeo Oku, Shoma Uchiya, Riku Okumura, Atsushi Suzuki, Iori Ono, Sakiko Fukunishi, Tomoharu Tachikawa, Tomoya Hasegawa
Publikováno v:
Inorganics, Vol 11, Iss 7, p 273 (2023)
The effects of guanidinium (C(NH2)3, GA) and cesium (Cs) co-additions on methylammonium lead iodide (CH3NH3PbI3, MAPbI3) perovskite solar cells were investigated. The first-principles calculations on the density of the states and band structures show
Externí odkaz:
https://doaj.org/article/209900828b164311898df2ef5e90cb49
Autor:
Riku Okumura, Takeo Oku, Atsushi Suzuki, Masanobu Okita, Sakiko Fukunishi, Tomoharu Tachikawa, Tomoya Hasegawa
Publikováno v:
Engineering Proceedings, Vol 31, Iss 1, p 29 (2022)
Copper, alkali metals, and organic cations were added to perovskite precursor solutions to enhance the photovoltaic conversion properties and durability of perovskite solar cells. Device properties were improved by the co-addition of copper and sodiu
Externí odkaz:
https://doaj.org/article/b76dce604df947978349347a51d4eea2
Autor:
Yugo Asakawa, Takeo Oku, Masashi Kido, Atsushi Suzuki, Riku Okumura, Masanobu Okita, Sakiko Fukunishi, Tomoharu Tachikawa, Tomoya Hasegawa
Publikováno v:
Technologies, Vol 10, Iss 6, p 112 (2022)
Perovskite photovoltaic devices added with tin (Sn) dichloride and copper (Cu) bromide were fabricated and characterized. The thin film devices were prepared by an ordinary spin-coating technique using an air blowing method in ambient air. A decaphen
Externí odkaz:
https://doaj.org/article/a00cbe21faf9435da34b20e92ba95934