Band alignment at CdS/CuInS2 heterojunction

14 August 1995

journal article
Published by AIP Publishing in Applied Physics Letters

Vol. 67 (7) , 980-982
https://doi.org/10.1063/1.114965

Abstract

Band offsets at CdS/CuInS₂ heterojunctions are studied by x‐ray photoemission spectroscopy. At the CdS/cyanide‐treated CuInS₂ junction, the conduction band offset is as small as −0.05±0.15 eV, while the valence band offset is 1.18±0.10 eV. The CdS/Cu‐rich CuInS₂ heterojunction without the treatment, however, possesses a conduction band offset of ∼−0.7 eV. This result suggests that the cyanide treatment improves the interface to give rise to the alignment of the conduction band minima, which is suitable to the solar cell applications.

Keywords

CADMIUM SULFIDES
INDIUM SULFIDES
HETEROSTRUCTURES
HETEROJUNCTIONS
INTERFACE STATES
BAND STRUCTURE
ALIGNMENT
SOLAR CELLS
PHOTOEMISSION
ENERGY LEVELS

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