Publication date: 21st July 2025
We demonstrate the inkjet printing of CsPbBr₃-based dual-phase perovskite systems for broadband photodetector applications. By leveraging the solution-processed approach, these perovskite films exhibit complementary optical properties that enable spectral coverage across the 275-650 nm UV–visible range. Through comprehensive structural and optoelectronic characterization, we confirm successful phase co-deposition via inkjet printing, which directly translates to strong absorption throughout the target spectral range. Building upon this foundation, integration with complementary materials further enhances charge extraction and device performance, as evidenced by the observed improvements in carrier dynamics and photoluminescence quenching. Consequently, the resulting photodetectors demonstrate exceptional responsivity, achieving values up to 57,245 A/W, while maintaining high sensitivity across the entire broad spectral range. Subsequently, wavelength and power-dependent measurements reveal the system's inherent tunability and suitability for various illumination conditions, with rapid photoresponse confirming excellent operational characteristics. Beyond demonstrating inkjet printing as a scalable manufacturing approach for perovskite-based optoelectronic devices, these results establish that perovskites can form effective synergistic partnerships with various complementary materials – such as graphene, charge transport layers, and other semiconductor systems—thereby overcoming individual material limitations to achieve enhanced photodetection performance. Such hybrid approaches open promising pathways for next-generation broadband photodetectors with tailored properties for diverse sensing applications.
This work was funded by the Ministry of Science and Innovation of Spain under the projects LIP-FREE (PID2022-140978OB-I00) and PIXIE-SENS (PDC2023-145804-I00). This work has been partially supported by PROMETEO Program from Generalitat Valenciana (Q-Solutions project reference CIPROM/2021/078). J.Marí-Guaita acknowledges the financial backing from grant JDC2022-049260-I funded by the Spanish Ministry of Science and Innovation and by the European Union Next Generation EU/PRTR.
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