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Title: High-quality II-VI films grown on amorphous substrates using tunable tetradymite templates

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4903268· OSTI ID:1370084
 [1];  [1];  [2];  [1];  [2];  [1];  [1]
  1. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Physics
  2. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Materials Science and Engineering

We demonstrate the growth of highly oriented CdSe and ZnTe films at ~300 °C on amorphous substrates such as glass and flexible polyimide using ultrathin tetradymite buffer layers composed of SbxBi2-xTe3 alloys lattice-matched to the film overgrowth. This leads to significant improvement of the crystallinity, roughness, grain size, and pit density of the II-VI overlayer along with enhancement of the optoelectronic properties. For example, photoluminescence emission is observed at ~1.74 eV for optimized CdSe films, the same as in a single crystal reference. An in-plane carrier diffusion length of ~500 nm is inferred from transient optical data. The use of tetradymite buffer layers to control II-VI compound deposition on non-crystalline substrates is a promising route for large area optoelectronic applications such as photovoltaic, light-emission, or infrared detector devices.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Solar and Thermal Energy Conversion (CSTEC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0000957; FG02-06ER46273; AC02-06CH11357
OSTI ID:
1370084
Alternate ID(s):
OSTI ID: 1226576
Journal Information:
Applied Physics Letters, Vol. 105, Issue 22; Related Information: CSTEC partners with University of Michigan (lead); Kent State University; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

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