Phase-change materials exhibiting tristability: Interconverting forms of crystalline α-, β-, and glassy K 2ZnSn 3S 8

Zohreh Hassanzadeh Fard, Mercouri Kanatzidis*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

20 Scopus citations

Abstract

We show that K 2ZnSn 3S 8 is a phase-change system that exhibits tristability. Kinetic and thermodynamic forms of different compounds in the K/Zn/Sn/S system have been synthesized and thoroughly characterized. We report an example where slow and rapid cooling of a melt of K 2CO 3/S/Sn/Zn leads to different kinetically stable products (crystalline layered α-K 2ZnSn 3S 8, 1, and glassy K 2ZnSn 3S 8, A, respectively). These forms convert to a thermodynamically stable compound (crystalline cubic β-K 2ZnSn 3S 8, 2) upon annealing below their melting points. The band gaps of compounds 1, A, and 2 are 2.30, 2.15, and 2.55 eV, respectively.

Original languageEnglish (US)
Pages (from-to)7963-7965
Number of pages3
JournalInorganic chemistry
Volume51
Issue number15
DOIs
StatePublished - Aug 6 2012

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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