Professional Education

  • Master of Engineering, Kyoto University (2012)
  • Bachelor of Engineering, Kyoto University (2010)

Stanford Advisors

All Publications

  • Chemical Approaches to Addressing the Instability and Toxicity of Lead-Halide Perovskite Absorbers INORGANIC CHEMISTRY Slayney, A. H., Smaha, R. W., Smith, I. C., Jaffe, A., Umeyama, D., Karunadasa, H. I. 2017; 56 (1): 46-55


    The impressive rise in efficiencies of solar cells employing the three-dimensional (3D) lead-iodide perovskite absorbers APbI3 (A = monovalent cation) has generated intense excitement. Although these perovskites have remarkable properties as solar-cell absorbers, their potential commercialization now requires a greater focus on the materials' inherent shortcomings and environmental impact. This creates a challenge and an opportunity for synthetic chemists to address these issues through the design of new materials. Synthetic chemistry offers powerful tools for manipulating the magnificent flexibility of the perovskite lattice to expand the number of functional analogues to APbI3. To highlight improvements that should be targeted in new materials, here we discuss the intrinsic instability and toxicity of 3D lead-halide perovskites. We consider possible sources of these instabilities and propose methods to overcome them through synthetic design. We also discuss new materials developed for realizing the exceptional photophysical properties of lead-halide perovskites in more environmentally benign materials. In this Forum Article, we provide a brief overview of the field with a focus on our group's contributions to identifying and addressing problems inherent to 3D lead-halide perovskites.

    View details for DOI 10.1021/acs.inorgchem.6b01336

    View details for Web of Science ID 000391248900007

    View details for PubMedID 27494338

  • Red-to-Black Piezochromism in a Compressible Pb-l-SCN Layered Perovskite CHEMISTRY OF MATERIALS Umeyama, D., Lin, Y., Karunadasa, H. I. 2016; 28 (10): 3241-3244