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https://hdl.handle.net/2445/193822
Title: | X‐ray Detectors With Ultrahigh Sensitivity Employing High Performance Transistors Based on a Fully Organic Small Molecule Semiconductor/Polymer Blend Active Layer |
Author: | Tamayo, Adrián Fratelli, Ilaria Ciavatti, Andrea Martínez Domingo, Carme Branchini, Paolo Colantoni, Elisabetta Rosa, Stefania de Tortora, Luca Contillo, Adriano Santiago, Raúl Bromley, Stefan Thomas Fraboni, Beatrice Mas Torrent, Marta Basiricò, Laura |
Keywords: | Ciència dels materials Detectors de radiació Semiconductors orgànics Raigs X Materials science Nuclear counters Organic semiconductors X-rays |
Issue Date: | 22-Jun-2022 |
Publisher: | Wiley-VCH |
Abstract: | The implementation of organic semiconductor (OSC) materials in X-ray detec tors provides exciting new opportunities for developing a new generation of biocompatible devices with high potential for the fabrication of sensitive and low-cost X-ray imaging systems. Here, the fabrication of high performance organic field-effect transistors (OFETs) based on blends of 1,4,8,11-tetrame thyl-6,13-triethylsilylethynyl pentacene (TMTES) with polystyrene is reported. The films are printed employing a low cost and high-throughput deposition technique. The devices exhibit excellent electrical characteristics with a high mobility and low density of hole traps, which is ascribed to the favorable her ringbone packing (different from most pentacene derivatives) and the vertical phase separation in the blend films. As a consequence, an exceptional high sensitivity of (4.10 ± 0.05) × 1010 µC Gy-1cm-3 for X-ray detection is achieved, which is the highest reported so far for a direct X-ray detector based on a tissue equivalent full organic active layer, and is higher than most perovskite film-based X-ray detectors. As a proof of concept to demonstrate the high potential of these devices, an X-ray image with sub-millimeter pixel size is recorded employing a 4-pixel array. This work highlights the potential exploi tation of high performance OFETs for future innovative large-area and highly sensitive X-ray detectors for medical dosimetry and diagnostic applications |
Note: | Reproducció del document publicat a: https://doi.org/10.1002/aelm.202200293 |
It is part of: | Advanced Electronic Materials, 2022, vol. 8, num. 10, p. 2200293 |
URI: | https://hdl.handle.net/2445/193822 |
Related resource: | https://doi.org/10.1002/aelm.202200293 |
ISSN: | 2199-160X |
Appears in Collections: | Articles publicats en revistes (Institut de Química Teòrica i Computacional (IQTCUB)) Articles publicats en revistes (Ciència dels Materials i Química Física) |
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