Controlling the Vapor Transport Crystal Growth of Hg 3 Se 2 I 2 Hard Radiation Detector Using Organic Polymer

Yihui He, Grant C.B. Alexander, Sanjib Das, Zhifu Liu, Ido Hadar, Kyle M. McCall, Wenwen Lin, Yadong Xu, Duck Young Chung, Bruce W. Wessels, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

Abstract

The chalcohalide compound Hg 3 Se 2 I 2 with a defect anti-perovskite structure has been demonstrated to be a promising semiconductor for room temperature X- and γ-ray detection. In this work, we use transport agents during the vapor growth of Hg 3 Se 2 I 2 crystals under gradient temperature profiles to dramatically improve the size and yield of Hg 3 Se 2 I 2 single crystals. Various growth conditions with combinations of organic polymer (polyethylene) with elemental Hg, Se, or I 2 are compared. The largest single crystals (with size up to 7 × 5 × 3.5 mm 3 ) were obtained using both polyethylene and excess I 2 as the transport agents. The as-prepared detector devices based on these crystals have excellent photo response to a series of radiation sources, including low flux X-ray source, alpha particles, and γ-rays. The X-ray induced photocurrent of Hg 3 Se 2 I 2 detectors is 3 orders of magnitude higher than the dark current, indicating excellent X-ray photosensitivity. Under 241 Am α particle source (5.5 MeV), the best energy resolution obtained is ∼8.1%. The Hg 3 Se 2 I 2 device also shows improved detector performance under 57 Co and 137 Cs γ-ray sources. The improved crystal growth and detector performance using this polymer additive during the vapor transport process further confirms the great potential for the development of Hg 3 Se 2 I 2 for radiation detection.

Original languageEnglish
Pages (from-to)2074-2080
Number of pages7
JournalCrystal Growth and Design
Volume19
Issue number4
DOIs
Publication statusPublished - Apr 3 2019

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Radiation detectors
Organic polymers
radiation detectors
Crystallization
Crystal growth
crystal growth
Vapors
vapors
Detectors
rays
detectors
polymers
Polyethylene
X rays
Polyethylenes
polyethylenes
Single crystals
Radiation
Crystals
Photosensitivity

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Controlling the Vapor Transport Crystal Growth of Hg 3 Se 2 I 2 Hard Radiation Detector Using Organic Polymer . / He, Yihui; Alexander, Grant C.B.; Das, Sanjib; Liu, Zhifu; Hadar, Ido; McCall, Kyle M.; Lin, Wenwen; Xu, Yadong; Chung, Duck Young; Wessels, Bruce W.; Kanatzidis, Mercouri G.

In: Crystal Growth and Design, Vol. 19, No. 4, 03.04.2019, p. 2074-2080.

Research output: Contribution to journalArticle

He, Y, Alexander, GCB, Das, S, Liu, Z, Hadar, I, McCall, KM, Lin, W, Xu, Y, Chung, DY, Wessels, BW & Kanatzidis, MG 2019, ' Controlling the Vapor Transport Crystal Growth of Hg 3 Se 2 I 2 Hard Radiation Detector Using Organic Polymer ', Crystal Growth and Design, vol. 19, no. 4, pp. 2074-2080. https://doi.org/10.1021/acs.cgd.8b01646
He, Yihui ; Alexander, Grant C.B. ; Das, Sanjib ; Liu, Zhifu ; Hadar, Ido ; McCall, Kyle M. ; Lin, Wenwen ; Xu, Yadong ; Chung, Duck Young ; Wessels, Bruce W. ; Kanatzidis, Mercouri G. / Controlling the Vapor Transport Crystal Growth of Hg 3 Se 2 I 2 Hard Radiation Detector Using Organic Polymer In: Crystal Growth and Design. 2019 ; Vol. 19, No. 4. pp. 2074-2080.
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