Please use this identifier to cite or link to this item:
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
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:
It is part of: Advanced Electronic Materials, 2022, vol. 8, num. 10, p. 2200293
Related resource:
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)

Files in This Item:
File Description SizeFormat 
729825.pdf1.61 MBAdobe PDFView/Open

This item is licensed under a Creative Commons License Creative Commons