Surface Modification of Heterojunction with Intrinsic Thin Layer Solar Cell Electrode with Organosilane

Area of Science:

• Materials Science
• Renewable Energy Technologies
• Semiconductor Physics

Background:

• Solar cells (SC) are crucial for sustainable energy, with heterojunction with intrinsic thin-layer (HIT) solar cells offering high efficiency.
• The indium tin oxide (ITO) layer in solar cells can present surface-related limitations.
• Surface passivation and energy level alignment are key strategies for improving photovoltaic device performance.

Purpose of the Study:

• To investigate the impact of 3-aminopropyltrimethoxysilane (APTMS) self-assembled monolayers (SAMs) on the ITO surface of HIT solar cells.
• To evaluate the enhancement of optical and electrical properties of HIT solar cells treated with APTMS SAMs.
• To determine the effect of APTMS SAMs on the overall efficiency and reliability of HIT solar cells.

Main Methods:

• Fabrication of HIT solar cells with an APTMS SAMs layer on the ITO surface.
• Utilizing photoluminescence (PL) mapping to assess optical properties and surface characteristics.
• Measuring key photovoltaic parameters including open-circuit voltage, fill factor, maximum power output, and efficiency.

Main Results:

• Photoluminescence mapping indicated increased brightness and photocurrent in HIT samples treated with APTMS SAMs.
• APTMS SAMs treatment resulted in improved energy level alignment and passivation of the ITO surface.
• Significant enhancements were observed in open-circuit voltage, fill factor, maximum power output, and overall efficiency.

Conclusions:

• The application of APTMS SAMs effectively passivates the ITO surface and optimizes energy level alignment in HIT solar cells.
• APTMS SAMs enhance charge carrier dynamics, leading to improved optical and electrical performance.
• This study demonstrates the potential of APTMS SAMs as a viable method for improving the efficiency and reliability of HIT solar cells.