In-situ observation of phase transformation in amorphous silicon during Joule-heating induced crystallization process

Dong Hyun Kim, Won Eui Hong, Jae Sang Ro, Seong Hyuk Lee, Chang Hoon Lee, Seungho Park

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10 Citations (Scopus)

Abstract

During the Joule-heating induced crystallization (JIC) process of amorphous silicon for display applications, its phase transformation from amorphous to polycrystalline phases occurs through two different kinetic paths of either solid-to-solid or solid-to-liquid-to-solid phases. Depending on input conditions such as power density and pulsing time, each path results in nano-crystalline silicon phases or large grain structures produced by lateral growth, respectively. In this study, the phase-transformation phenomena during the JIC process were detected electrically and optically by the in-situ measurements of input voltage/current and normal reflectance at wavelength of 532 nm. The temperature field estimated from a simple conduction model confirms the phase-transformation behavior observed experimentally. In addition we could obtain the poly-Si structure produced by solid phase crystallization having the process time of 250 μs and reaching the highest temperature around 1350 K.

Original languageEnglish
Pages (from-to)5516-5522
Number of pages7
JournalThin Solid Films
Volume519
Issue number16
DOIs
Publication statusPublished - 2011 Jun 1

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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