Journal
Publisher
IEEE
Keywords
Kesterite; CZTSSe; CZGSSe; Band-gap engineering; Band-gap tuning
Categories
Funding
- German Federal Ministry of Education and Research (BMBF) [FKZ 03SF0530B]
- Karlsruhe School of Optics and Photonics (KSOP) at KIT
- European Union [640868]
- Flemish government, Department Economy, Science and Innovation
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The replacement dynamics of Se by S is investigated in kesterite Cu2ZnSn(S,Se)(4) and Cu2ZnGe(S,Se)(4). Two different post-sulphurization techniques yield the same results. In the initial stages of the replacement, the original selenium-rich phase coexists with a second mixed phase. This phase has an increased sulphur content of 30 %. In later stages of the reaction, the initial phase disappears in favor of the second phase. Thus, sulphur inclusions of less than 30 % seem impossible while above 30 % the sulphur amount is adjustable.
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