CH3NH3PbI3 Perovskite Solar Cells using CuSCN Inorganic Hole Transmitting Layer
Find out more about subscribing to add all events.
CH3NH3PbI3 Perovskite Solar Cells using CuSCN Inorganic Hole Transmitting Layer
Mon, 15/09/2014 - 11:15 to 12:15
Location:
Speaker:
Prof. Seigo Ito
Affiliation:
University of Hyogo
Synopsis:
Despite the rapid increase in efficiency of the hybrid organic-inorganic methylammonium lead halide perovskites (CH3NH3PbI3, X = Cl-, Br-, I-) solar cells, the hole transporting material (HTM) used were mainly limited to organic compounds, the start-of-the-art 2,2’,7,7’-tetrakis(N,N-di-p-methoxyphenylamine)-9,9’-spirobifluorene (spiro-MeOTAD) and conducting polymers. Compared to organic HTMs, inorganic p-type semiconductors appear to be an ideal choice from the point of view of high mobility, stability ease of synthesis and low cost. Here, we report that combining the perovskite CH3NH3PbI3 with CuSCN as p-type HTM lead to solar cells with very high power conversion efficiency (12.4%) under full sun illumination (Fig. 1). Moreover, to improve the stability, Sb2S3 layers were inserted at the interface between TiO2 and CH3NH3PbI3 perovskite to be CH3NH3PbI3 solar cells using inorganic hole transporting material (CuSCN) (Fig. 2). The CH3NH3PbI3 layer was spin-coated by one-drop method on nanocrystalline TiO2 layer. During the light exposure test without encapsulation, the CH3NH3PbI3 solar cells without Sb2S3 deteriorated to zero efficiency in 12 h and were completely changed from black to yellow, because the perovskite CH3NH3PbI3 was changed to hexagonal PbI2. With Sb2S3, on the other hand, the CH3NH3PbI3 solar cells became stable against light exposure without encapsulation, which didn’t change the crystal structure and the wavelength edges of absorption and IPCE. Therefore, it was considered that the degradation can occur at the interface between TiO2 and CH3NH3PbI3.
Biography:
Prof. Seigo Ito received his Ph.D. from the University of Tokyo (Japan), with a thesis that was the first to discuss Grätzel-type dye-sensitized solar cells in Japan. He worked in the Laboratory of Professor Shozo Yanagida (Osaka University, Japan) for two years, and in the Laboratory of Professor Michael Grätzel, at the Swiss federal Institute of Technology (EPFL) in Lausanne as a postdoctoral scientist for over three years, where his efforts focused on the progress of high-efficiency dye-sensitized solar cells. He is currently professor at University of Hyogo, making new printable cost-effective solar cells.
Education:
Bachelor of Engineering in Department of Hydrocarbon Chemistry, Faculty of Engineering, Kyoto University,
Kyoto, Japan, 1995
Master of Engineering in Department of Chemistry and Biochemistry, School of Engineering, the University of
Tokyo, Tokyo, Japan, 1997
PhD (Engineering) in Department of Chemistry and
Biochemistry, School of Engineering, the University of
Tokyo, Tokyo, Japan, 2000
Working Experience:
Post
Research Associate
Venture Business Laboratory,
Osaka University, Japan From April, 2000
to November, 2001
Post Doctoral Researcher
Faculty of Science, Kwansei Gakuin University, Japan From December, 2001
to March, 2002
Researcher
Research Institute of Innovative Technology for the Earth (RITE),
Japan From April, 2002
to January 2003
Ingénieur Chimiste
ICMB-LPI, Ecole Polytechnique
Fédérale de Lausanne
(EPFL), Switzerland. From February, 2003
to August, 2006
A member of a company
KYOCERA, Japan. From September, 2006
to September, 2007
Professor
University of Hyogo
From October, 2007 to the present
Biography:
Seigo Ito received his Ph.D. from the University of Tokyo (Japan), with a thesis that was the first to discuss Grätzel-type dye-sensitized solar cells in Japan. He worked in the Laboratory of Professor Shozo Yanagida (Osaka University, Japan) for two years, and in the Laboratory of Professor Michael Grätzel, at the Swiss federal Institute of Technology (EPFL) in Lausanne as a postdoctoral scientist for over three years, where his efforts focused on the progress of high-efficiency dye-sensitized solar cells. He is currently professor at University of Hyogo, making new printable cost-effective solar cells.
Institute:
Related Documents:
