Science Advances

This PDF file includes:

• Fig. S1. SEM characterization of seeded substrate using a flow seeding process.
• Fig. S2. Optical microscopy image of PbI₂ plates grown on a transparent glass substrate.
• Fig. S3. EDX studies of prepared perovskite plates.
• Fig. S4. Digital image of perovskite photodetector arrays on a transparent glass substrate.

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