(Photoinduced charge separation in solid-state and molecular systems: Year three progress report)

Technical Report · Tue Jan 01 00:00:00 EST 1991

DOI:https://doi.org/10.2172/5730107· OSTI ID:5730107

Bocarsly, A B

Our goal is to understand the role of intrinsic cyanometalate overlayers in modulating interfacial photoinduced charge transfer processes occurring at the cadmium chalconide/aqueous ferri-ferrocyanide interface. To accomplish this goal, detailed structural and charge transfer studies of (CdFe(CN){sub 6}){sup 2-/1-} overlayers generated either intrinsically via photoelectrochemistry at the illuminated CdX/(Fe(CN){sub 6}){sup 4-/32} (X=S or Se) interface, or synthesized as chemical modification layers on inert metal electrodes have been undertaken. From these studies, a picture has evolved which directly links charge transfer mediated cation intercalation processes to surface overlayer crystal structure, and overlayer structure to critical charge transfer parameters. We have discovered that a photoelectrochemical cell of composition n-CdSe/(1M) KCN provides a relatively unique environment for testing the dynamic effects of chemisorption processes on heterogeneous charge transfer at the semiconductor-liquid junction. Thus, our retrospective studies have provided for new insight into semiconductor photochemistry. In parallel with our photoelectrochemical projects we have also introduced work on the spatially resolved photodeposition of platinum metal on nonconducting and semiconducting substrates. This chemistry provides new opportunities for the design of semiconductor (or insulator)-metal heterostructures which have applications in solar energy conversion.

• Research Organization: Princeton Univ., NJ (United States). Dept. of Chemistry
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-85ER13438
• OSTI ID: 5730107
• Report Number(s): DOE/ER/13438-3; ON: DE92010130
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ELECTROLYTES
INTERFACES
PLATINUM
DEPOSITION
SEMICONDUCTOR MATERIALS
CADMIUM SELENIDES
CADMIUM SULFIDES
CHEMISORPTION
ELECTRON TRANSFER
FERROCYANIDES
PHOTOCHEMICAL REACTIONS
PHOTOELECTROCHEMICAL CELLS
PROGRESS REPORT
SCANNING ELECTRON MICROSCOPY
VOLTAMETRY
CADMIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPLEXES
DOCUMENT TYPES
ELECTROCHEMICAL CELLS
ELECTRON MICROSCOPY
ELEMENTS
EQUIPMENT
INORGANIC PHOSPHORS
IRON COMPLEXES
MATERIALS
METALS
MICROSCOPY
PHOSPHORS
PLATINUM METALS
SELENIDES
SELENIUM COMPOUNDS
SEPARATION PROCESSES
SOLAR EQUIPMENT
SORPTION
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS
400500* - Photochemistry
400400 - Electrochemistry