TY - JOUR
T1 - Controllable bandgap of Cu2ZnSn(S,Se)4 thin films via simultaneous supercritical fluid chalcogenization
AU - Nakayasu, Yuta
AU - Tomai, Takaaki
AU - Oka, Nobuto
AU - Honma, Itaru
N1 - Publisher Copyright:
© 2015 The Japan Society of Applied Physics
PY - 2015/2/1
Y1 - 2015/2/1
N2 - Supercritical ethanol (scEtOH), with its high solubility and reducibility, can be used as a medium to fabricate chalcogenide semiconductors from stable solid chalcogen sources. We fabricated Cu2ZnSn(S,Se)4 films via chalcogenization of Cu-Zn-Sn oxide precursor films using scEtOH to dissolve SeO2 and elemental sulfur (S8). The S/Se molar ratio and the bandgap of Cu2ZnSn(S,Se)4 films were controlled by changing the input ratio of selenium source (SeO2) to sulfur source (S8). Analysis indicated that high-density atomic chalcogens are the dominant reactive species. This process may contribute to the development of non-vacuum fabrication methods for chalcogenide-semiconductor solar cells.
AB - Supercritical ethanol (scEtOH), with its high solubility and reducibility, can be used as a medium to fabricate chalcogenide semiconductors from stable solid chalcogen sources. We fabricated Cu2ZnSn(S,Se)4 films via chalcogenization of Cu-Zn-Sn oxide precursor films using scEtOH to dissolve SeO2 and elemental sulfur (S8). The S/Se molar ratio and the bandgap of Cu2ZnSn(S,Se)4 films were controlled by changing the input ratio of selenium source (SeO2) to sulfur source (S8). Analysis indicated that high-density atomic chalcogens are the dominant reactive species. This process may contribute to the development of non-vacuum fabrication methods for chalcogenide-semiconductor solar cells.
UR - http://www.scopus.com/inward/record.url?scp=84922369251&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84922369251&partnerID=8YFLogxK
U2 - 10.7567/APEX.8.021201
DO - 10.7567/APEX.8.021201
M3 - Article
AN - SCOPUS:84922369251
VL - 8
SP - 21201
JO - Applied Physics Express
JF - Applied Physics Express
SN - 1882-0778
IS - 2
ER -