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Related Concept Videos

P-N junction01:11

P-N junction

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A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
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Well-aligned Vertically Oriented ZnO Nanorod Arrays and their Application in Inverted Small Molecule Solar Cells
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Slanted Titanium Dioxide Nano-Rod Based Hybrid Solar Cells.

Hyong-Jun Kim, Yunseok Choi

    Journal of Nanoscience and Nanotechnology
    |September 3, 2015
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    Summary

    Researchers created slanted titanium dioxide nano-rods for solar cells. These nano-rods, when used in a hybrid solar cell with specific organic materials, achieved a power conversion efficiency of 1.67%.

    Area of Science:

    • Materials Science
    • Nanotechnology
    • Renewable Energy

    Background:

    • Titanium dioxide (TiO2) is a widely studied semiconductor material for photovoltaic applications.
    • Developing efficient nanostructures is crucial for enhancing solar cell performance.
    • Hybrid solar cells offer a promising route to combine the advantages of different light-harvesting materials.

    Purpose of the Study:

    • To fabricate slanted columnar titanium dioxide nano-rods using glancing angle deposition.
    • To investigate the structural and crystalline properties of the fabricated nano-rods after annealing.
    • To evaluate the performance of a hybrid solar cell incorporating these nano-rods.

    Main Methods:

    • Glancing angle deposition (GAD) was employed to create slanted columnar TiO2 nano-rods.

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  • Annealing was performed to transform the TiO2 crystallinity into the anatase phase.
  • A hybrid solar cell was constructed using poly-3-hexylthiophene (P3HT) and methanofullerene (PC61BM) in a 1:0.7 weight ratio with the TiO2 nano-rods.

    • Main Results:

    • Slanted columnar TiO2 nano-rods with anatase phase crystallinity were successfully fabricated.
    • The resulting hybrid solar cell demonstrated a power conversion efficiency (PCE) of 1.67%.
    • The nanostructure and crystallinity influenced the photovoltaic performance of the device.

    Conclusions:

    • Slanted TiO2 nano-rods are viable components for hybrid solar cells.
    • The GAD technique offers control over nano-rod morphology for potential efficiency improvements.
    • Further optimization of materials and architecture could enhance the PCE of these devices.