A Taxonomy for Three-Terminal Tandem Solar Cells

Area of Science:

• Photovoltaics and Renewable Energy
• Materials Science
• Device Physics

Background:

• Tandem and multijunction solar cells are crucial for achieving terrestrial 1-sun solar cell efficiencies exceeding 30%.
• Three-terminal tandem (3TT) solar cells present an alternative to two-terminal and four-terminal designs, potentially overcoming specific limitations.
• The complexity of 3TT devices and their performance measurement necessitates standardized terminology.

Purpose of the Study:

• To propose a standardized taxonomy for three-terminal tandem (3TT) solar cells.
• To establish a common nomenclature for discussing 3TT device structures and loading topologies.
• To provide a historical overview of three-terminal devices in scientific literature.

Main Methods:

• Literature review of existing three-terminal solar cell configurations.
• Development of a classification system (taxonomy) for 3TT device structures.
• Analysis of performance metrics and reporting standards for 3TT devices.

Main Results:

• A proposed taxonomy for classifying 3TT solar cell configurations and loading topologies.
• Demonstration that various 3TT device designs can achieve efficiencies above 30% with proper engineering.
• Identification of the need for standardized reporting to facilitate research and development.

Conclusions:

• A standardized taxonomy is essential for clear communication and comparison of 3TT solar cell research.
• The proposed nomenclature will aid in understanding the diversity of 3TT device architectures.
• Optimized 3TT solar cells hold significant potential for high-efficiency solar energy conversion.