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Graphene–Perovskite Hybrids Achieve Ultrasensitive Broadband Photodetection

Researchers have created graphene‑perovskite hybrid photodetectors by inkjet‑printing mixed‑phase CsPbBr₃/Cs₄PbBr₆ films directly onto CVD graphene. The intimate photogating between the high‑mobility graphene channel and the perovskite layer yields responsivities above 5.7 × 10⁴ A W⁻¹ and detectivities exceeding 10¹⁶ Jones at 312 nm. The “raisin‑bread” perovskite morphology stabilizes the active domains, while the lithography‑free process preserves graphene quality and supports large‑area, flexible substrates. These metrics place the devices among the most sensitive graphene‑perovskite hybrids reported.