2018年第65回応用物理学会春季学術講演会

講演情報

一般セッション(口頭講演)

6 薄膜・表面 » 6.3 酸化物エレクトロニクス

[18a-C102-1~11] 6.3 酸化物エレクトロニクス

2018年3月18日(日) 09:00 〜 12:00 C102 (52-102)

廣瀬 靖(東大)

11:15 〜 11:30

[18a-C102-9] Control of TiO2 thin film density and mechanical properties by laser radiation.

〇(DC)Dauksta Edvins1,2、Arturs Medvids2、Vygantas Mizeikis1、Kenji Murakami1 (1.Shizuoka University、2.Riga Technical Univ.)

キーワード:tio2, laser, solar cells

In this study, the effects of laser radiation were investigated on the TiO2 thin density and mechanical properties.
TiO2 thin films were prepared by the spray deposition technique on glass substrates and ITO/PEN substrates.
Samples were modified by a direct laser write technique without prior annealing in the furnace. In this study we have used 1064 nm pulsed nanosecond Nd:YAG laser with pulse duration of 6 ns and continuous wave UV 405 nm laser diode. Adhesion to the glass substrate was tested by sonication with 120 W power at 38 kHz in water for 1, 3 and 5 min. Samples on the flexible substrate where tested by bending. Raman spectroscopy was used to determine a polymorph phase change.
Laser irradiation leads to the densification of TiO2 nanoparticles without a change of the polymorph phase according to the Raman spectroscopy results. Moreover, the densified TiO2 thin film has higher mechanical hardness and higher adhesion to the substrate than the pristine TiO2 thin film.