High-Pressure Phase Transition of Metastable Wurtzite-Like CuInSe2 Nanocrystals
Journal Article
·
· Chemistry of Materials
- Washington State University, Pullman, WA (United States)
- University of Southern California, Los Angeles, CA (United States)
Ternary I–III–VI2 semiconductors, such as CuInSe2, exhibit diverse polymorphs with unique structural characteristics and optoelectronic properties. This study investigates the pressure-induced phase transitions of metastable wurtzite-like CuInSe2 nanocrystals. Using a combination of synchrotron X-ray diffraction, pair distribution function analysis, and density functional theory calculations, we reveal a transition from cation-ordered wurtzite-like (Pmc21) to cation-disordered NaCl-like (Fm3̅m) structures at 7.7 GPa. The cation-disordered NaCl-like phase persists upon decompression. Bulk modulus calculations highlight size-dependent deviations from bulk material behavior. These findings deepen our understanding of phase stability in colloidal I–III–VI2 semiconductor nanocrystals, with implications for tailoring functional materials under extreme conditions.
- Research Organization:
- University of Southern California, Los Angeles, CA (United States); Washington State University, Pullman, WA (United States)
- Sponsoring Organization:
- National Science Foundation (NSF), Division of Materials Research; USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
- Grant/Contract Number:
- AC02-06CH11357; SC0006812; SC0025423
- OSTI ID:
- 2533598
- Alternate ID(s):
- OSTI ID: 2551834
OSTI ID: 3013921
- Journal Information:
- Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 7 Vol. 37; ISSN 0897-4756
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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