Flexible Inkjet-Printed Triple Cation Perovskite X-ray Detectors
| Autor: | Uli Lemmer, Tobias Abzieher, Marcus Zuber, Gerardo Hernandez-Sosa, Fabian Schackmar, Tilo Baumbach, Ulrich W. Paetzold, Helge Eggers, Bryce S. Richards, E. Hamann, Henning Mescher |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry Detector X-ray detector 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Semiconductor PEDOT:PSS Quantum dot Optoelectronics General Materials Science 0210 nano-technology Absorption (electromagnetic radiation) business Dark current Perovskite (structure) |
| Zdroj: | ACS applied materialsinterfaces. 12(13) |
| ISSN: | 1944-8252 |
| Popis: | Flexible direct conversion X-ray detectors enable a variety of novel applications in medicine, industry, and science. Hybrid organic-inorganic perovskite semiconductors containing elements of high atomic number combine an efficient X-ray absorption with excellent charge transport properties. Due to their additional cost-effective and low-temperature processability, perovskite semiconductors represent promising candidates to be used as active materials in flexible X-ray detectors. Inspired by the promising results recently reported on X-ray detectors that are based on either triple cation perovskites or inkjet-printed perovskite quantum dots, we here investigate flexible inkjet-printed triple cation perovskite X-ray detectors. The performance of the detectors is evaluated by the X-ray sensitivity, the dark current, and the X-ray stability. Exposed to 70 kVp X-ray radiation, reproducible and highly competitive X-ray sensitivities of up to 59.9 μC/(Gyaircm2) at low operating voltages of 0.1 V are achieved. Furthermore, a significant dark current reduction is demonstrated in our detectors by replacing spin-coated poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS) with sputtered NiOx hole transport layers. Finally, stable operation of a flexible X-ray detector for a cumulative X-ray exposure of 4 Gyair is presented, and the applicability of our devices as X-ray imaging detectors is shown. The results of this study represent a proof of concept toward flexible direct conversion X-ray detectors realized by cost-effective and high-throughput digital inkjet printing. |
| Databáze: | OpenAIRE |
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