Direct preparation of laser-induced doped graphite films on glass surfaces under domain-limiting effect for photonic debonding

Abstract

Constructing doped carbon-based multifunctional films with stable structures and excellent adhesion on glass substrates represents a core challenge and research focus in contemporary materials processing. Traditional high-temperature fabrication processes often suffer from aging and agglomeration of dopant particles, leading to reduced film structural uniformity and severely limiting their application potential in broad-spectrum light absorption and efficient thermal management. Here, we propose an in situ preparation method for laser-induced doped graphite films (LDGF) based on the domain-limiting effect, enabling the one-step construction of multifunctional release layers on glass surfaces. This approach utilizes the localized transient thermal field and non-equilibrium dynamics induced by ultraviolet lasers to promote the formation of stable interlayer bridging structures between metal ions and heteroatoms within the defective carbon matrix. The photothermal shock resistance of the LDGF film stems from the interfacial adhesion established through local substrate re-deposition and is further enhanced by the mechanical reinforcement imparted by metal ion bridges. Meanwhile, LDGF exhibits outstanding optical absorption performance (200–1200 nm, >91.99 %), coupled with extremely low light transmittance (<0.01 %). Experiments further demonstrate that LDGF reduces the photonic debonding threshold for identical bonding pairs by approximately 41 %, significantly broadening the applicability and operational window of photonic debonding processes. This laser-induced doping graphitization strategy provides an innovative and feasible material preparation pathway for photothermal conversion layers required in wafer-level and panel-level photonic debonding technologies for advanced packaging.