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  Chemical Sensors 2013, 3: 10
  Research Article
 
Photosensitizing effect of methyl red dye in a doped organic photodetector
  Marcos A. L. dos Reisa, Lucimara S. Romanb, Jordan Del Neroc  
     
a Faculdade de Ciências Exatas e Tecnologia, Universidade Federal do Pará, Rua Manoel de Abreu, Abaetetuba, PA 68440-00, Brazil
b Departamento de Física, Universidade Federal do Paraná, Curitiba, PR ,C.P. 19044, 81531-990, Brazil
c Departamento de Física, Universidade Federal do Pará, Belém, PA 66075-110, Brazil

   
  Abstract  
  An organic photodetector has been developed for dark and spectral response under intense illumination of visible light at 1% Sun. The photosensor devices were fabricated with and without a blended polymer-methyl red dye layer and its photovoltaic properties have been studied. The polymers and blended layers were deposited onto fluorine-doped tin oxide covered glass substrates by spin-coating techniques and an aluminum electrode was prepared on top by electron beam evaporation techniques forming an active area of 0.06 cm2. The characterizations were performed by UV-visible spectrophotometers and picoammeter to investigate their absorption spectra and photovoltaic parameters of dye-doped photodetectors such as open circuit voltages, short circuit currents, fill factors and power conversion efficiency have been calculated to be 614 mV, 7.87 nA, 0.267 and 0.00214%, respectively. The photovoltaic current was also measured under dark and illuminated regimes with rise times at 300 msec. indicating potential application as dye-sensitized photosensors.
     
  Keywords  
  Dye-doped; Photodetector; Photovoltaic; Methyl red  
     
   
   
   
   
     

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