Novel hybrid organic-inorganic perovskite detector designs based on multilayered device architectures: simulation and design

摘要

Cost effective direct conversion detectors for different photon energies that provide high performance are of fundamental importance in medical diagnosis. Conventional direct conversion detectors typically provide either large area devices with moderate performance at reduced costs or expensive high performance architectures with limited size. In order to investigate the feasibility of highly efficient detectors based on low-cost large area processable hybrid organic-inorganic materials, multilayered device architectures consisting of stacked conversion layers are investigated. For this purpose, models that describe the sensitivity and the detective quantum efficiency are extended to the proposed detector design. This enables to evaluate the performance of multilayered detectors based on scintillator-sensitized organic and polycrystalline perovskite materials. A sensitivity analysis based on various multilayered designs at different photon energies shows significantly higher performance of polycrystalline perovskite conversion layers compared to scintillator-sensitized organic materials. The evaluation of detective quantum efficiencies lead to limitations for the number of stacked layers and enables to deduce design rules based on optimal layout parameters. The comparison with conventional single layer detectors shows competitive performance of multilayered detectors compared to high quality single crystals for all investigated photon energies.