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Qiwei Han

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  1. arXiv

    Perovskite models stumble on new alloys: encoding solid-solution continuity cuts unseen-alloy error by 15.7–19.0%

    V-PaSS encodes the physical continuity of perovskite solid solutions, cutting error by 15.7–19.0% on unseen absorber alloys under a protocol where every test device comes from an unseen laboratory.

    Duke UniversityGeorgia Institute of Technology
    Qiwei Han（First author）
    Virtual-Alloy Physics-Aware Semantic Systemperovskite solar cells
  2. arXiv

    Perovskite model scoring gets a new split: a lookup table matches the published best on random splits, and neural models overtake trees on unseen institutions

    Evaluating perovskite solar-cell machine learning with provenance-grouped splits shows a lookup table that learns nothing matches the published state of the art on a random split, while neural models overtake tree ensembles on unseen institutions and later years.

    Duke UniversityGeorgia Institute of Technology
    Qiwei Han（First author）
    Provenance-grouped protocolPerovskite DatabaseData leakageBenchmarking thirteen modelsperovskite solar cells

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