Eco‐Friendly Laser‐Induced Graphene/Perovskite Hybrids for Eco‐Friendly Photodetectors

ABSTRACT

The growing demand for flexible electronics has paralleled increasing attention to sustainability and eco‐friendly device fabrication. Laser‐induced graphene (LIG), which can be directly generated from natural carbon sources, offers a cost‐effective and environmentally responsible approach to next‐generation electronics. In this work, we demonstrate the direct laser writing of LIG on cellulose filter paper under ambient conditions, producing a flexible and patterned sensing substrate. To enhance optoelectronic performance, LIG was further integrated with the highly light‐absorbing MAPbI ₃ perovskite via a simple solution deposition method. Photodetectors based on pure LIG and hybrid LIG/MAPbI ₃ structures were fabricated and systematically compared. The hybrid devices exhibited a nearly tenfold improvement in responsivity (13.9 to 136.9 mA/W) and a sevenfold increase in detectivity (7.67 × 10 ⁷ to 5.33 × 10 ⁸ Jones) over pure LIG devices, while retaining excellent stability after 1000 bending cycles. These results highlight paper‐based LIG/perovskite photodetectors as promising candidates for sustainable optoelectronic applications.