Built-In Potential in Fe2O3-Cr2O3 Superlattices for Improved Photoexcited Carrier Separation.
basic_science · Level V
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- Record sourced from PubMed, PMID 26679198.
- Also identified by DOI 10.1002/adma.201504545.
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Abstract
Hematite (α-Fe2 O3) is engineered to improve photoexcited electron-hole pair separation by synthesizing Fe2O3-Cr2O3 superlattices (SLs) with precise atomic control. The different surface terminations exhibited by Fe2O3 and Cr2O3 determine the hetero-junction interface structure and result in controllable, noncommutative band offset values. This controllable band alignment is harnessed to generate a built-in potential as large as 0.8 eV in Fe2 O3-Cr2O3 SLs.