Bifacial dye-sensitized solar cells based on vertically oriented TiO2 nanotube arrays

Area of Science:

• Materials Science
• Renewable Energy
• Photovoltaics

Background:

• Dye-sensitized solar cells (DSCs) are a type of photovoltaic technology.
• Bifacial solar cells offer enhanced power generation by capturing light from both sides.
• Traditional DSC designs are typically monofacial.

Purpose of the Study:

• To introduce and evaluate a novel bifacial design for dye-sensitized solar cells (DSCs).
• To assess the performance of bifacial DSCs under single-sided and dual-sided illumination.
• To explore the potential of bifacial DSCs for cost-effective solar electricity generation in high albedo environments.

Main Methods:

• Fabrication of bifacial DSCs using double-sided TiO(2) nanotube arrays on a Ti metal substrate.
• Utilizing ruthenium complex for dye sensitization.
• Employing two electron-collecting counter electrodes.
• Measuring conversion efficiencies and output power under front, rear, and simultaneous illumination.

Main Results:

• Bifacial DSCs demonstrated comparable conversion efficiencies when illuminated from the front or rear side.
• The device achieved a summated output power when illuminated on both sides simultaneously.
• The bifacial DSC could sum output power even in an 'unsymmetrical' mode with differing front and rear illumination intensities.

Conclusions:

• The novel bifacial DSC design shows significant promise for enhancing solar energy capture.
• This design has the potential to reduce the cost of solar electricity, particularly in environments with high reflected light (albedo).
• Further development of bifacial DSCs could expand their applicability in renewable energy solutions.