Full-Color High-Resolution Inkjet-Printed Perovskite Imager with Monolithically Integrated Thin-Film Transistor Array

Full-colour imagers are essential for capturing both spatial and spectral information, yet conventional architectures rely on broadband photodiodes integrated with passive colour filters, which introduce optical losses and constrain pixel density and colour fidelity. Here we report a full-colour perovskite imaging sensor based on the monolithic integration of inkjet-printed perovskite photodetector (PPD) arrays with a thin-film transistor (TFT) backplane. In this architecture, colour discrimination is achieved through vertically stacked perovskite photoactive and filter layers, enabling intrinsic narrowband photodetection without external optical filters. To realize high-resolution integration on TFT circuitry, we develop an inkjet-printing strategy based on controlled droplet dynamics, substrate superhydrophilicity and regulated nucleation/crystallization, which suppresses coffee-ring formation and enables uniform, defect-minimized perovskite micropatterns. The resulting active-matrix imager features 30 µm patterned perovskite pixels on a 160 µm Bayer-pattern pitch, corresponding to a 64 × 64 colour-pixel array with a resolution of 159 pixels per inch. The red, green and blue PPDs exhibit narrowband spectral selectivity over 570–750, 500–570 and 450–500 nm, respectively, together with high responsivity, low dark current, linear dynamic ranges of up to 24.83 dB, and self-powered operation with a − 3 dB bandwidth of 140 Hz. Using a custom-built readout platform, we further demonstrate faithful colour image acquisition and reconstruction. This work establishes inkjet-printed perovskite/TFT integration as a scalable route towards compact, lightweight and high-performance full-colour imaging systems.