Semiconductor electrodes. 50. Effect of mode of illumination and doping on photoelectrochemical behavior of phthalocyanine films. Technical report 1 Sep 82-1 Aug 83

Technical Report · Fri Feb 25 00:00:00 EST 1983

OSTI ID:5795414

Leempoel, P; Fan, F F; Bard, A J

The behavior of photoelectrochemical (PEC) cells composed of SnO/sub 2/ or Pt electrodes with coatings of different phthalocyanines (Pc) -H/sub 2/Pc, ZnPc, MgPc, (CuPc, InPc) 1 was investigated. Spectral sensitization at the Sn0/sub 2//Pc interface leads to photooxidation currents, while efficient photoreduction occurs at the Pc/solution interface through bulk generation of charge carriers. The presence of both anodic and cathodic photocurrents leads to different net photocurrent responses for back and front side illumination, especially with thicker films. The efficiency of the reduction process was sensitive to the potential of the redox couple in solution and maximized when E redox was about 0.37V for N/sub 2/Pc, ZnPc and -MgPc. A dramatic improvement of the photoelectrochemical behavior of the coating results from doping with an electron acceptor (e.g.,o-chloranil) and quantum yields as high a s 4.6% were measured for Pt/H/sub 2/Pc electrodes.

• Research Organization: Texas Univ., Austin (USA). Dept. of Chemistry
• OSTI ID: 5795414
• Report Number(s): AD-A-125856/5; TR-28
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
ELECTRODES
COATINGS
PHOTOELECTROCHEMICAL CELLS
PHTHALOCYANINES
PHOTOCHEMICAL REACTIONS
INTERFACES
OXIDATION
OXIDES
PLATINUM
QUANTUM EFFICIENCY
SUBSTRATES
TIN COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
DYES
EFFICIENCY
ELECTROCHEMICAL CELLS
ELEMENTS
EQUIPMENT
HETEROCYCLIC COMPOUNDS
METALS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PLATINUM METALS
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TRANSITION ELEMENTS
140505* - Solar Energy Conversion- Photochemical
Photobiological
& Thermochemical Conversion- (1980-)