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Title: The effects of fabrication temperature on current-voltage characteristics and energy efficiencies of quantum dot sensitized ZnOH-GO hybrid solar cells

The effects of fabrication temperature are investigated on the performance of CdSe quantum dot (QD)-sensitized hybrid solar cells of the composite material of zinc (hydr)oxide (ZnOH-GO)with 2 wt. % graphite oxide. The current-voltage (I-V) and photo-current measurements show that higher fabrication temperatures yield greater photovoltaic power conversion efficiencies that essentially indicate more efficient solar cells. Two Photon Fluorescence images show the effects of temperature on the internal morphologies of the solar devices based on such materials. The CdSe-QD sensitized ZnOH-GO hybrid solar cells fabricated at 450 °C showing conversion of ∼10.60% under a tungsten lamp (12.1 mW/cm{sup 2}) are reported here, while using potassium iodide as an electrolyte. The output photocurrent, I (μA) with input power, P (mW/cm{sup 2}) is found to be superlinear, showing a relation of I = P{sup n}, where n = 1.4.
Authors:
 [1] ;  [2] ;  [2] ;  [1] ;  [2] ; ;  [1] ;  [2] ;  [1] ;  [2] ; ;  [3]
  1. IUSL, Department of Physics, The City College of New York, 160 Convent Ave., New York, New York 10031 (United States)
  2. (United States)
  3. Department of Chemistry, The City College of New York, 160 Convent Ave., New York, New York 10031 (United States)
Publication Date:
OSTI Identifier:
22308203
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 17; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CADMIUM SELENIDES; COMPOSITE MATERIALS; CONVERSION; CURRENTS; ELECTRIC CONDUCTIVITY; ELECTRIC POTENTIAL; ELECTROLYTES; ENERGY EFFICIENCY; FLUORESCENCE; GRAPHITE; IMAGES; PHOTONS; PHOTOVOLTAIC EFFECT; POTASSIUM IODIDES; QUANTUM DOTS; SOLAR CELLS; ZINC HYDROXIDES