Liquid Silicon

  • Tatsuya Shimoda


Since Cyclopentasilane (CPS) is used as a raw material for all of the silicon-based solutions needed for solar cells, thin-film transistors, and ultimately metal-oxide semiconductor field-effect transistors (MOSFETs), its basic properties are first introduced in this chapter. Concerning the production or conversion steps from CPS to Si films shown in Fig. 3.2, I introduce the production steps up to the formation of Si ink (i, p, n) in this chapter. How to synthesize the silicon solution and its physical properties are described. CPS can be polymerized by irradiation with ultraviolet (UV) light so as to form polydihydrosilane (polysilane) and then is dissolved into an organic solvent to form an intrinsic silicon solution or silicon ink. During polymerization under UV irradiation, doped silicon solutions of both n-type and p-type can be prepared by doping with phosphorus and boron, respectively.


Cyclopentasilane (CPS) Polydihydrosilane Si ink Size-exclusion chromatography-multi-angle laser light scattering (SEC-MALLS) Specific viscosity 


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© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Tatsuya Shimoda
    • 1
  1. 1.Japan Advanced Institute of Science and TechnologyNomiJapan

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