Perovskite (structure)

Condensed matter physics

Engineering

Chemical engineering

Optoelectronics

Coercivity

Nanotechnology

Layer (electronics)

Thin-film transistor

Crystallite

Thin film

Metallurgy

Materials science

Physics

Advanced Functional Materials

Thanks to its strong X‐ray absorption and large carrier diffusion length, perovskites have demonstrated excellent performance for X‐ray detection. Combination of perovskite with thin‐film transistor (TFT) arrays to construct flat‐panel X‐ray imager (FPXI) is required for X‐ray imaging, yet this is rarely reported. Solution processing of perovskite thick film onto TFT can enable the electronic connection, however the amounts of pinholes inevitably form during the solvent evaporation and result in a porous film with deteriorated performance and stability. Here a novel strategy is raised to achieve high‐quality perovskite thick films for TFT integration via soft‐pressing and in situ polymerization of multi‐functional binder (TMTA). The combined process largely eliminates the pinholes, improves the surface smoothness, passivates grains boundaries, reduces ionic migration, and improves stability. Accordingly, a compact and smooth MAPbI 3 thick film integrating with TFT arrays is prepared for flat‐panel X‐ray imagi...

Compact and Large‐Area Perovskite Films Achieved via Soft‐Pressing and Multi‐Functional Polymerizable Binder for Flat‐Panel X‐Ray Imager