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A universal design and benchmarking framework for indoor photovoltaics
Indoor photovoltaics (IPVs) can sustainably power the growing smart-device ecosystem, yet they are commonly designed and evaluated using human-vision metrics and arbitrary spectra, impairing progress. Khampa et al. propose a universal, spectrum-aware framework for IPV design and benchmarking. By charting realistic indoor lighting diversity, they reveal an expanded optimal band-gap range (1.45–2.1 eV), introduce the spectral onset at 95% cumulative irradiance to unify IPV trends, and implement locus-based benchmarking to capture full efficiency spaces of IPVs, enabling fair cross-device comparisons.
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