Thickness-dependent substitutional-Sn-Concentration in GeSn-on-Insulator by weak-laser-irradiation-enhanced solid-phase crystallization at low-Temperature (180°C)

Takayuki Sugino, Kenta Moto, Hiroshi Ikenoue, Masanobu Miyao, Taizoh Sadoh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Effects of film-Thickness on substitutional Sn concentration in GeSn films on insulator grown by combination of laser irradiation and subsequent thermal annealing are investigated. Here, the laser fluence is chosen as weak, which is below the critical fluence for crystallization of GeSn. It is clarified that for samples irradiated with low fluence, complete crystallization of a-Ge0.8Sn0.2 films (thickness: 50200 nm) is achieved by subsequent thermal annealing at 180°C for 5 h without incubation time. The substitutional Sn concentrations increase with decreasing film thickness. As a result, very high substitutional Sn concentration of ∼15%, which corresponds to high-substitution fraction of ∼75% of total Sn atoms, is achieved for film thickness of 50 nm. This technique will be useful to realize next-generation high performance devices on flexible insulating substrates.

Original languageEnglish
Title of host publicationAM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices
Subtitle of host publicationTFT Technologies and FPD Materials, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages241-243
Number of pages3
ISBN (Electronic)9784990875336
Publication statusPublished - Aug 8 2017
Event24th International Workshop on Active-Matrix Flatpanel Displays and Devices, AM-FPD 2017 - Kyoto, Japan
Duration: Jul 4 2017Jul 7 2017

Other

Other24th International Workshop on Active-Matrix Flatpanel Displays and Devices, AM-FPD 2017
CountryJapan
CityKyoto
Period7/4/177/7/17

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Computational Theory and Mathematics

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    Sugino, T., Moto, K., Ikenoue, H., Miyao, M., & Sadoh, T. (2017). Thickness-dependent substitutional-Sn-Concentration in GeSn-on-Insulator by weak-laser-irradiation-enhanced solid-phase crystallization at low-Temperature (180°C). In AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings (pp. 241-243). [8006137] Institute of Electrical and Electronics Engineers Inc..