D
Daisuke Hirotani
Researcher at Kyushu Institute of Technology
Publications - 33
Citations - 1572
Daisuke Hirotani is an academic researcher from Kyushu Institute of Technology. The author has contributed to research in topics: Perovskite (structure) & Tin. The author has an hindex of 12, co-authored 29 publications receiving 801 citations.
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Journal ArticleDOI
Lead-free tin-halide perovskite solar cells with 13% efficiency
Kohei Nishimura,Muhammad Akmal Kamarudin,Daisuke Hirotani,Kengo Hamada,Qing Shen,Satoshi Iikubo,Takashi Minemoto,Kenji Yoshino,Shuzi Hayase,Shuzi Hayase +9 more
TL;DR: In this article, the A site cation of tin halide perovskite solar cells was replaced with formamidinium cation to achieve a tolerance factor of nearly 1.
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Mixed Sn–Ge Perovskite for Enhanced Perovskite Solar Cell Performance in Air
Nozomi Ito,Muhammad Akmal Kamarudin,Daisuke Hirotani,Yaohong Zhang,Qing Shen,Yuhei Ogomi,Satoshi Iikubo,Takashi Minemoto,Kenji Yoshino,Shuzi Hayase +9 more
TL;DR: This work proposes a new type of perovskite material based on mixed tin and germanium, which showed a band gap around 1.4-1.5 eV as measured from photoacoustic spectroscopy, which is ideal from the perspective of solar cells.
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Suppression of Charge Carrier Recombination in Lead-Free Tin Halide Perovskite via Lewis Base Post-treatment.
Muhammad Akmal Kamarudin,Daisuke Hirotani,Zhen Wang,Kengo Hamada,Kohei Nishimura,Qing Shen,Taro Toyoda,Satoshi Iikubo,Takashi Minemoto,Kenji Yoshino,Shuzi Hayase +10 more
TL;DR: The X-ray photoelectron spectroscopy data suggest that the recombination reaction is originated from the nonstoichiometric Sn:I ratio rather than Sn4+:Sn2+ ratio, which is the highest reported efficiency to date for pure tin-halide PSCs.
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All-Inorganic CsPb 1-x Ge x I 2 Br Perovskite with Enhanced Phase Stability and Photovoltaic Performance
Fu Yang,Daisuke Hirotani,Gaurav Kapil,Muhammad Akmal Kamarudin,Chi Huey Ng,Yaohong Zhang,Qing Shen,Shuzi Hayase +7 more
TL;DR: Novel inorganic CsPb1-x Gex I2 Br perovskite solar cells prepared in humid ambient atmosphere without a glovebox showed nearly no decay after 7 h measurement in 50-60 % relative humidity without encapsulation and the phase stability of the all-inorganic perovkite was effectively enhanced after germanium addition.
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Strain Relaxation and Light Management in Tin–Lead Perovskite Solar Cells to Achieve High Efficiencies
Gaurav Kapil,Gaurav Kapil,Takeru Bessho,Chi Huey Ng,Kengo Hamada,Manish Pandey,Muhammad Akmal Kamarudin,Daisuke Hirotani,Takumi Kinoshita,Takashi Minemoto,Qing Shen,Taro Toyoda,Takurou N. Murakami,Hiroshi Segawa,Shuzi Hayase +14 more
TL;DR: Tin-lead (Sn-Pb)-based perovskite solar cells (PSCs) still exhibit inferior power conversion efficiency (PCE) compared to their pure Pb counterparts because of high voltage loss (VL) and high photo...