SIMS Analysis of CIGS Thin Film Solar Cells for PV Efficiency

The Application

CIGS (CuInGaSe₂) thinfilm solar cells are among the most promising photovoltaic technologies thanks to their high efficiency and tunable bandgap. Optimizing these devices requires detailed understanding of elemental distributions—especially alkali metals like sodium (Na) and potassium (K), which significantly enhance conversion efficiency.

The Challenge

CIGS solar cells consist of complex multilayer stacks where small variations in composition, alkali diffusion, or interface quality can greatly influence efficiency. Traditional analytical tools lack the depth resolution and sensitivity needed to characterize thin layers, trace alkali elements at low concentrations, or detect subtle structural differences between samples. Reliable quantitative depth profiling is essential for understanding performance variations and ensuring production quality—but difficult to achieve without highly specialized instrumentation.

Our Unique Solution

CAMECA’s IMS 7fAuto delivers unmatched depth profiling performance for CIGS materials, offering:

• High sensitivity and dynamic range for detecting key elements, including Na and K, that affect device efficiency.
• High depth resolution to resolve thin layers and interfaces within the solar cell stack.
• High mass resolution, enabling accurate analysis of matrix species and trace dopants.
• Fast analysis throughput ideal for routine characterization and R&D workflows.
• Precise indepth elemental distribution, essential for investigating alkali diffusion, interface quality, and impurity control.

Based on the well-established SIMS technique, this powerful platform helps researchers pinpoint variables that drive solar cell performance and improve manufacturing consistency.

Case Study

In a study conducted using SIMS, CIGS films were deposited on Mo bilayer back contacts over sodalime glass (SLG) substrates. By adding or removing a SiOₓ barrier layer, researchers controlled the diffusion of Na into the CIGS layer and then used SIMS to measure the indepth distribution of both matrix elements and alkali metals. The results clearly showed how Na and K concentrations varied across samples and how these differences impact device quality. The characterization demonstrated the IMS 7fAuto’s capability to resolve complex multilayer structures and provide insights into doping distribution and impurity levels.

SIMS depth profiles of matrix species and alkali metals (Na and K) in a CIGS-based multilayered sample. Data collected on IMS 7f at KIST (South Korea). From: Structural and compositional analyses of Cu(In,Ga)Se2 thin film solar cells with different cell performances. M. Kim et al, J. Vac. Sci. Technol. B.

BestFit Product: CAMECA IMS 7fAuto

The IMS 7fAuto is designed for highperformance SIMS depth profiling and excels in applications requiring high sensitivity, high depth resolution, and excellent dynamic range. For CIGS solar cell research, it offers the ideal balance of throughput and analytical precision, enabling detailed characterization of absorber layers, interface quality, dopant distribution, and alkali element behavior. Its capabilities make it a key tool for advancing nextgeneration thinfilm PV technologies.

Learn More

Enhance your CIGS solar cell development with industryleading SIMS capabilities.

👉 Contact our experts today to discuss your analytical needs, request a demo, or obtain detailed technical specifications.

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