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Updated: Aug 29, 2025
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Printing Fabrication of Bulk Heterojunction Solar Cells and In Situ Morphology Characterization
Published on: January 29, 2017
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Device Modelling and Optimization of Nanomaterial-Based Planar Heterojunction Solar Cell (by Varying the Device
Vijai Meyyappan Moorthy1, Viranjay M Srivastava1
1Department of Electronic Engineering, Howard College, University of KwaZulu-Natal, Durban 4041, South Africa.
Nanomaterials (Basel, Switzerland)
|September 9, 2022
Summary
This study models organic photovoltaic devices using mathematical analysis to optimize performance. Key findings highlight the importance of thin layers, high exciton diffusion, and improved charge mobility for efficient solar cells.
Area of Science:
- Materials Science
- Renewable Energy
- Semiconductor Physics
Background:
- Organic photovoltaics (OPVs) offer a promising avenue for low-cost solar energy conversion.
- Standard planar heterojunction (PHJ) devices require optimization for enhanced efficiency and material selection.
- Mathematical modeling provides a framework for understanding and improving OPV device performance.
Purpose of the Study:
- To mathematically model a multi-physics organic photovoltaic (OPV) device.
- To analyze the behavior of a standard planar heterojunction (PHJ) device for optimization.
- To evaluate the impact of device structure, geometry, and material properties on performance.
Main Methods:
- Mathematical modeling and simulation of a PHJ OPV device.
- Analysis of device parameters including size, transport properties, and layer thickness.
- Investigation of Indium Tin Oxide (ITO), semiconducting single-wall carbon nanotube (s-SWCNT), fullerene C70, and Aluminum (Al) as device components.
Main Results:
- Optimized device structure and geometrical properties were evaluated.
- The effects of varying device size and transport parameters on performance were analyzed.
- The ITO/s-SWCNT/C70/Al configuration demonstrated a short-circuit current density (J) of 5.61 mA/cm², open-circuit voltage (V) of 0.7 V, fill factor (FF) of 79%, and efficiency (ɳ) of 3.1%.
Conclusions:
- A highly effective ITO/s-SWCNT/C70/Al PHJ solar cell can be fabricated with specific material properties.
- Key factors for high performance include a thin active layer, high exciton diffusion length, and improved charge carrier mobility, particularly hole mobility.
- Device performance is sensitive to the photoactive layer thickness, paving the way for inexpensive, efficient solar cells.
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