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

Journal Article · Fri Nov 07 00:00:00 EST 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4899203· OSTI ID:22308203

Islam, S. M. Z. ^[1]; Gayen, Taposh ^[1]; Tint, Naing; Alfano, Robert ^[1]; Shi, Lingyan ^[1]; Seredych, Mykola; Bandosz, Teresa J. ^[2]

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1. IUSL, Department of Physics, The City College of New York, 160 Convent Ave., New York, New York 10031 (United States)
2. Department of Chemistry, The City College of New York, 160 Convent Ave., New York, New York 10031 (United States)

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.

• OSTI ID: 22308203
• Journal Information: Journal of Applied Physics, Vol. 116, Issue 17; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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