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Hbaromega Private Limited, an India-based PV characterization technology company, has reported initial results from adapting light beam induced current (LBIC) characterization for BC solar cells. The company said the method provides deeper diagnostic insight than conventional PV characterization. “The method facilitates resolving carrier transport behavior and localized electrical losses in BC architectures,” says Prashant Kumar, CTO of Hbaromega. In LBIC, a focused laser beam scans the solar cell surface while the generated photocurrent is recorded, producing a spatial map of carrier collection efficiency. The method can identify a long list of parameters, including microcracks, recombination-active regions, transport non-uniformities, and several more. The BC cells add diagnostic complexity because carriers move vertically through the silicon bulk and laterally toward interdigitated rear contacts. Thus, the state-of-the-art characterization methods such as EL and PL lead to scattered signals, reducing measurement resolution. “LBIC, in contrast, employs an external, highly focused light spot that directly probes, which minutes internal scattering and significantly improves measurement precision,” says Prof. K. S. Narayan, Founder Director Hbaromega. On top, while LBIC typically requires several hours, Hbaromega has broken these barriers to cut down these measurement times to seconds-scale. The company is commercializing this capability through PV Vision Pro for cell characterization and ModuleXpert for module diagnostics and is currently seeking industrial partnerships for next-generation solar cell manufacturing.
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