The University of Tokyo · Engineering
Hiroshi Segawa 교수의 연구실은 주로 태양전지 및 에너지 변환 소재를 중심으로 연구를 진행하고 있습니다. 페로브스카이트 태양전지의 효율성 향상과 안정성 향상을 위한 홀 수송 물질 개발, 그리고 광촉매 및 다이아졸센시티브 태양전지 기반의 에너지 저장 시스템 개발이 핵심 연구 방향입니다. 특히, 금속이 없는 효율적 홀 수송 재료, 고안정성 포르피린 유도체, 그리고 광전기화학적 에너지 저장 장치의 설계에 초점을 맞추고 있습니다.
Figures are computed from collected data and may differ slightly.
The recently certified efficiency of 22.7% makes perovskite solar cells (PSCs) rise to the top among the thin film technologies of photovoltaics. The research activities of PSCs have been triggered by the ground-breaking report on a 9.7% efficient and 500 h-stable solid-state perovskite solar cell employing methylammonium lead iodide adsorbed on mesoporous TiO2 film and an organic hole conducting layer in 2012. However, PSCs are facing issues on stability, current–voltage hysteresis, ion migrati
A novel photo-sensitized polymerization of pyrrole by the use of tris(2,2′-bipyridine)ruthenium(II) as a photo-sensitizer has been investigated in aqueous solution and in polymer matrix for the fabrication of fine conducting polymer patterns.
N-fused carbazole-zinc porphyrin-free-base porphyrin triad featuring an ethynyl-linkage was synthesized; efficient sensitization as long as 900 nm was demonstrated and an overall light-to-electricity conversion efficiency of 5.21% was achieved under AM 1.5 G one sun illumination.
An efficient metal-free formulation of a hole transport material (HTM) based on an ionic liquid polymer is developed for n–i–p perovskite solar cells (PSCs), to address reproducibility issues related to the use of complex dopant mixtures based on lithium salts and cobalt coordination complexes. The conductivity of the HTM is thus significantly improved by 4 orders of magnitude, up to 1.9 × 10–3 S·cm–1, using poly(1-butyl-3-vinylimidazolium bis(trifluoromethylsulfonyl)imide) (PVBI-TFSI) as dopant
Water-stable, axial dialkoxy hypervalent phosphorus(V)tetraphenylporphyrins have been synthesised in a novel fashion by efficient substitution of axial chloride ligands of dichlorophosphorus(V)-tetraphenylporphyrin.
A three-electrode-type solar-rechargeable battery, energy-storable dye-sensitized solar cell (ES-DSSC), has been constructed by the hybridization of a typical Gratzel cell and a conducting polymer charge-storage electrode; efficient photo-charging can be accomplished by visible-light irradiation.
ADVERTISEMENT RETURN TO ISSUEArticleNEXTPhotoinduced electron-transfer reactions of porphyrin heteroaggregates: energy gap dependence of an intradimer charge recombination processHiroshi Segawa, Chie Takehara, Kenichi Honda, Takeo Shimidzu, Tsuyoshi Asahi, and Noboru MatagaCite this: J. Phys. Chem. 1992, 96, 2, 503–506Publication Date (Print):January 1, 1992Publication History Published online1 May 2002Published inissue 1 January 1992https://pubs.acs.org/doi/10.1021/j100181a001https://doi.org/10
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