TY - JOUR
T1 - The roles of cesium ions in regulating photoinduced interfacial charge transfer at the n-type cadmium chalcogenide/ferrocyanide interface
AU - Arent, Douglas J.
AU - Hidalgo-Luangdilok, Carmela
AU - Chun, Jonathan K.M.
AU - Bocarsly, Andrew Bruce
AU - Woods, Robert E.
N1 - Funding Information:
This material is based upon work supported by the Department of Energy, Office of Basic Energy Sciences, under grant DE-FG02-85ER13938 .
PY - 1992/7/1
Y1 - 1992/7/1
N2 - Addition of Cs+ ions to electrolytes utilized with n-type cadmium chalcogenide photoanodes has previously been reported to have major effects on the stability and in some cases the electrochemical output parameters of such cells. The observed behavior has been attributed both to chemical effects occurring in the electrolyte and to semiconductor surface modification based on the adsorption of Cs+ ions. The present study evaluates the effects of Cs+ on n-CdX/ferri-ferrocyanide (X= S, Se) photo- electrochemical cells. Two effects are observed: the intercalation of Cs+ into [CdFe(CN)6] 2- 1- overlayers which are intrinsic to the semiconductor surface, and the specific chemisorption of Cs+ onto CdSe surfaces. The former effect is found to reorganize the overlayer microstructure allowing for enhanced interfacial charge transport, while the latter process leads to unfavorable heterogeneous charge-transfer kinetics.
AB - Addition of Cs+ ions to electrolytes utilized with n-type cadmium chalcogenide photoanodes has previously been reported to have major effects on the stability and in some cases the electrochemical output parameters of such cells. The observed behavior has been attributed both to chemical effects occurring in the electrolyte and to semiconductor surface modification based on the adsorption of Cs+ ions. The present study evaluates the effects of Cs+ on n-CdX/ferri-ferrocyanide (X= S, Se) photo- electrochemical cells. Two effects are observed: the intercalation of Cs+ into [CdFe(CN)6] 2- 1- overlayers which are intrinsic to the semiconductor surface, and the specific chemisorption of Cs+ onto CdSe surfaces. The former effect is found to reorganize the overlayer microstructure allowing for enhanced interfacial charge transport, while the latter process leads to unfavorable heterogeneous charge-transfer kinetics.
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U2 - 10.1016/0022-0728(92)80186-8
DO - 10.1016/0022-0728(92)80186-8
M3 - Article
AN - SCOPUS:0001700829
SN - 0022-0728
VL - 328
SP - 295
EP - 310
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
IS - 1-2
ER -