Dry processing of perovskite-polymer composites for photon conversion and detection

• Autores: Bas Antonius Hendrikus Huisman
• Directores de la Tesis: Henk Jan Bolink (dir. tes.), Michele Sessolo (codir. tes.)
• Lectura: En la Universitat de València ( España ) en 2024
• Idioma: inglés
• Número de páginas: 121
• Tribunal Calificador de la Tesis: Francisco Palazón Huet (presid.), Raquel Eugenia Galian (secret.), Gustavo De Miguel Rojas (voc.)
• Programa de doctorado: Programa de Doctorado en Nanociencia y Nanotecnología por la Universidad de Alicante; la Universidad de Castilla-La Mancha; la Universidad de La Laguna; la Universidad Jaume I de Castellón y la Universitat de València (Estudi General)
• Calificación: Sobresaliente Cum Laude
• Materias:
  • Física
• Enlaces
  • Tesis en acceso abierto en: TESEO
• Resumen

  • In the last 10 years, semiconducting metal-halide perovskites have become of great interest in the international research community due to their excellent optoelectronic properties. Nowadays, most efficient perovskite-incorporated devices are processed with solution-based techniques. Nevertheless, there are some disadvantages and limitations with this processing technique, mostly related to the use of solvents in this process. Therefore, an alternative solvent-free method to obtain perovskites is desirable, particularly when it is a scalable technique leading to high-quality materials and films. Here a novel dry processing route to convert mechanochemical synthesized granular perovskite materials into disks with dimensions suitable for use in optoelectronic applications is demonstrated by mixing the perovskite with an inert thermoplastic polymer followed by high-pressure molding. These disks are then characterized for multiple optoelectronic applications. First color converters are produced, using the metal halide perovskite, MAPbBr3 which has a relatively low thermal stability and can lead to highly luminescent particles. Furthermore, optoelectronic devices can be produced by selecting an adhesive polymer, here, PBMA, where the disks can be integrated on a substrate configuration by simple hot-roll lamination. The perovskite CsPbBr3 is mixed with PBMA and lateral photoconductors are obtained for broad and narrowband detection by laminating the disks on a pre-patterned interdigitated electrode. By producing a vertical device structure, direct X-ray detectors can be obtained with good stability, and a low limit of detection. Furthermore, flexible X-ray detectors could be produced, which are on par with rigid ones showing the versatility of this processing technique.