黄色生长态 LiInSe2 晶体组分调控与生长坩埚材质选择

Translated title of the contribution: Composition regulation of yellow growing LiInSe2 crystal and material selection of growing crucible

Zhi Zheng, Zheren Zhang, Rui Zhang, Menghua Zhu, Yadong Xu

Research output: Contribution to journalArticlepeer-review

Abstract

LiInSe2 crystal is a semiconductor material used for thermal neutron detection at room temperature. In the paper, red and yellow LiInSe2 crystals are successfully synthesized via the vertical Bridgman method after optimization of the synthesis process and the crucible material used. The crystal structural characteristics, relative content of elements, optical properties and macroscopic inclusion phase of the yellow crystals are studied. According to the results, the yellow LiInSe2 polycrystalline material with controllable composition can be stably obtained by improving synthesis process and adding 3% of Li and 0. 002 7 mol of Se as additional components. Meanwhile, it is found that utilizing a graphite crucible and implementing appropriate crucible rotation techniques, such as accelerated crucible rotation technique (ACRT), enables the production of high-quality LiInSe2 crystals for neutron detection. Calculated by the transmission spectrum, the optical bandgap widths of the yellow crystals grown by different methods are approximately 2. 8 eV. The density of the precipitates in the middle section of the yellow growing crystal is 3. 50 × 103/cm2, and the size of the inclusion phase is about 5-10 μm.

Translated title of the contributionComposition regulation of yellow growing LiInSe2 crystal and material selection of growing crucible
Original languageChinese (Traditional)
Pages (from-to)73-77
Number of pages5
JournalHarbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology
Volume57
Issue number2
DOIs
StatePublished - Feb 2025

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