Research

My research interests are focused on preparation of semiconducting and ferromagnetic oxide thin films and construction of electronics devices including photovoltaic devices with electrochemical reactions in aqueous solutions. Major research activities are on the preparation and controlling the quality of oxide semiconductors (ZnO,Cu2O,CuO), construction and science on the oxide and hybrid photovoltaic device (bulk and heterointerface science), and development of Cu(InGa)Se2 photovoltaic device.

Theme1：Preparation of metal oxide and metallic smart layers by electrochemical process designed using thermodynamics

Overview

Thermodynamic calculation of the solution chemical properties, and the CuO/Cu2O bilayer photocathode fabricated by the electrochemical process designed using thermodynamics

The direct preparation process of ZnO layer has been discovered at 1996, and the advantages of the solution chemical process and the thermodynamic design has been revealed by demonstrating the direct preparation of Fe3O4, Cu2O, CuO, CeO2, and Ag2O. And, the process is extending to fabricate directly the bilayers and nanostructures with excellent photoactivity.

Selected publications and works

伊﨑昌伸、他、日本金属学会誌, 57, 182(1993) : Ni-Al
M. Izaki, et al., Appl. Phys. Lett., 68,2439(1996).: ZnO
M. Izaki, et al., Met. Mater. Trans., A, 27A, 483(1996) : Fe-C
M. Izaki, Electrochem. Solid State Lett., 1, 215(1997).: In2O3
M. Izaki, et al., Advanced Materials, 13(2000), 142. : Fe3O4
M. Izaki, Electrodeposition of Iron and Iron Alloys, Modern Electroplating 4th edition(JOHN WILEY & SONS, 2000)
M. izaki, et al., J. Mater. Chem., 11, 1972(2001). : CeO2
M. Izaki, et al., J. Electrochemical. Soc., 152, C179(2005). : Cu2O
M. Izaki, Electrodeposition of Iron and Iron Alloys, Modern Electroplating 5th edition(JOHN WILEY & SONS, 2010)
M. Izaki, et al. J. Electrochemical. Soc., 158, D578(2011). : CuO
伊﨑昌伸、水溶液電気化学製膜法による酸化物半導体膜の形成と太陽電池への展開（技術情報協会、2014)
伊﨑昌伸、CERAMICS JAPAN, 51, 504(2016).
M. Izaki, J. Jpn Inst. Met. Mater., 84, 177(2020)
M. Izaki, et al., ACS OMEGA, 5, 683(2020). : CuO/Cu2O bilayers
T. Shinagawa, M. izaki, et al., ACS OMEGA, 6, 2312(2021)
M. Izaki, et al., J. Electrochem. Soc., 168, 112510(2021).
D. Katsuma, M. Izaki, et al., J. Electrochem. Soc., 169, 042501(2022).

Keywords

Theme2：Ordered arrangement of the atoms and molecules

Overview

Room temperature ultraviolet-light emitting ZnO vertical nanowire, and growth steps formed on the <001>-C8-BTBT layer

Fundamental studies on oxide photovoltaic devices with copper oxide (Cu2O & CuO)-light-absorbing layers and hybrid photovoltaic devices composed of oxide semiconductors and organic semiconductors such as C60 and phthalocyanine compounds are performed to open the door to high performance solar cells by using solution electrochemical process and vacuum processes including electron-beam and thermal evaporation and sputtering techniques under financial supports of JSPS, JST, and NEDO. Figure shows the change in surface potential of the surface for Ga:ZnO:Cu-phthalocyanine bulk heterojunction layer by irradiating light with photon-assisted kelvin force microscopy(PKFM).

M. Izaki, et al., J. Phys. D: Appl. Phys., 40(2007), 3326.
M. Izaki, et al., American Chemical Society, Appl. Mater. Interface, 4(2012), 3558.M. Izaki, et al.,American Chemical Society, Appl. Mater. Interface, 5(2013), 9386.
M. Izaki, et al., RSC Advance, 4(2014), 14956.

Selected publications and works

M. Izaki, et al., Advanced Materials, 15,2000(2003).
M. Kobayashi, M. Izaki, et al., Appl. Phys. Lett., 106, 081909(2015).
M. Izaki, et al., Phys. Status Solidi A, 214, 1600473(2017).
伊﨑昌伸、湖山貴之、他、構造体及び構造体の製造方法、特願2017-083466(2017).
A. M. Moh, M. Izaki, Phys. Status Solidi A, 215, 1700862(2018).A. M. Moh, M. Izaki, Phys. Status Solidi A, 215, 1700862(2018).
H. Ohara, S. Wakazuki, P. L. Khoo, M. Kobayashi, A. Nakanishi, M. Nakamura, S. Watase, J. Shinozaki, M. Izaki, J. Electrochem. Soc., 169(2022), 042507.

Keywords

Theme3：Energy conversion of sustainable solar energy

Overview

CuO-Cu2O bilayer and nano composite fabricated by electrochemical reactions, and the photovoltaic performance

Theoretical design and consideration of the solution electrochemical process based on thermochemistry are performed to develop the process for preparing smart oxide semiconductors from aqueous solutions. The calculation of potential-pH diagram and solubility curves is carried out for the process we use, and we have demonstrated the advantage of the thermochemistry simulation for the design of the CuO semiconductor preparation process. And, light-assisted electrochemical process for stacking the n-ZnO on p-Cu2O has been developed based on the chemistry of the semiconductor/solution interface as shown in figure.

M. Izaki, et al., Electrochem. Solid State Lett., 14, D30(2011).
B. M. Fariza, M. izaki, et al., Thin Solid Films, 520(2012), 2261.

Selected publications and works

（Metal oxide photovoltaic devices）
M. Izaki, et al., J. Physics D, 40,3326(2007). (Top1% paper in Physics)
M. izaki, et al., ACS Appl. Mater. Interface, 6, 13461(2014).
M. Izaki, et al., Japanese patent, 2017-54917(2017).
M. Izaki, et al., ACS Appl. Ener. Mater., 2, 4833(2019).
M. Izaki, et al., ACS OMEGA, 6, 27587(2021).

（Organic photovoltaic devices）
M. Izaki, et al., ACS Appl. Mater. Interface, 5, 9386(2013).
M. Izaki, et al., RSC Advance, 4, 14956(2014).
M. Hiramoto, M. izaki, et al., ACS Appl. Ener. Mater., 2, 2087(2019).

(Other)
伊﨑昌伸、無機太陽電池、新エネルギー最前線（化学同人, 2006)
伊﨑昌伸、Cu2O系太陽電池、化合物薄膜太陽電池の最新技術（シーエムシー出版、2007)
伊﨑昌伸、CBD方によるバッファ層の形成技術、化合物薄膜太陽電池の最新技術II（シーエムシー出版、2014)
伊﨑昌伸、エネルギーデバイス、3, 52(2016).
伊﨑昌伸、銅酸化物系太陽電池、次世代の太陽電池・太陽光発電（技術情報協会、2018)

Keywords

Title of class

Introduction to mechanical engineering（B11530050),Physics III(B1013007b), Material science(B11620210),Fundamental Material Science(B11622010),Projective research(B11510080),Mterial processing technology(M21622030)，Production enginnering(D311030030)，Science and technology of thin films(M41630080)

Others (Awards, Committees, Board members)

著書：
伊﨑昌伸、分担執筆、レアメタル便覧（丸善, 2011).
伊﨑昌伸、分担執筆、化学便覧基礎編改訂６版（丸善, 2020)

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