Solar Cell Drives CPV Technology

Concentrating Photovoltaics (CPV) delivers industry-best module efficiencies of 36 percent or more by utilizing low-cost optics and 2-axis tracking to concentrate light onto the highest-efficiency solar cells. CPV systems enable the lowest cost of energy in high DNI regions. At the heart of every CPV system is a multijunction solar cell.

CPV cell

Solar Junction’s Proprietary Materials Platform

Solar Junction’s lattice-matched solar cell increases yield, reliability, and efficiency by avoiding strain and defects common with metamorphic, or non-lattice matched, structures. Optimizing material quality is essential for lowering long-term epitaxial and wafer-processing costs, and for ensuring long-term reliability.

Lattice Matching

Multi-Junction Solar Cell

Solar Junction’s multi-junction solar cell is comprised of multiple individual solar cells grown on top of each other. Each sub-cell is composed of a unique material that absorbs a specific portion of the solar spectrum. The top cell absorbs blue light, while the bottom cell absorbs infrared light. Unlike the single junction silicon cell, Solar Junction’s multi-junction technology enables a roadmap to ever-increasing efficiency gains. By adding additional sub-cells designed to absorb increasingly narrow segments of the solar spectrum, we are in the unique position to drive solar cell efficiencies to 50% and beyond.

Multi-Junction #1
Multi-Junction #2

Bandgap Tunability

Solar Junction’s proprietary dilute nitride material is bandgap tunable from 0.8 eV to 1.25 eV, enabling high material quality for solar cells, a superior efficiency roadmap, and a wide range of applications in the infrared technology space. The following chart demonstrates:

Quantum Efficency

Technology

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