@article{0ac283850bff4376a08b90ed6725501d,
title = "Experimental determination of solidified lithium disilicate crystal bandgap energy using EELS and XPS",
abstract = "Lithium disilicate (LS2) has been a crucial parent composition for glass-ceramics since the 1950s because of its excellent chemical and physical durability. In addition, a wide range of electrical properties can be obtained by changing the composition and crystallinity. Bandgap energy is one of the critical electrical properties for designing new lithium silicate-based materials. In this study, the bandgap energy of a synthesized LS2 crystal is evaluated using electron energy-loss spectroscopy and X-ray photoelectron spectroscopy. These two techniques unambiguously establish that the bandgap energy of LS2 is 7.7-7.8 eV, which is in the vacuum ultraviolet region. This confirms the insulating nature of the LS2 crystal.",
keywords = "X-ray photoelectron spectroscopy (XPS), bandgap, electron energy-loss spectroscopy (EELS), lithium disilicate",
author = "Masanori Tashiro and Sohei Sukenaga and Sakiko Kawanishi and Yohei Sato and Yuji Takakuwa and Hiroyuki Shibata",
note = "Funding Information: This work was supported in part by JSPS KAKENHI (grant numbers 18H00287 and 19H00276) and was performed under the {"}Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials{"} from the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT). The authors thank Mr Masaki Chiba, Mr Yoshiyuki Gambe, and Ms Mariko Ando, Tohoku University, for their technical support in the XRD, XPS, and NMR experiments, respectively. Publisher Copyright: {\textcopyright} 2020 The American Ceramic Society",
year = "2020",
month = sep,
day = "1",
doi = "10.1111/jace.17221",
language = "English",
volume = "103",
pages = "5139--5144",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
publisher = "Wiley-Blackwell",
number = "9",
}