High performance X-ray detectors can be realized by a variety of different approaches. However, more and more attention is paid to direct conversion X-ray detectors in a planar device geometry that use hybrid organic-inorganic perovskite semiconductors as absorber material. This study follows an alternative approach and uses a folded instead of a planar device architecture in order to realize a high performance X-ray detector. By reporting on the fabrication of a foldable perovskite sensor array and by demonstrating a high X-ray sensitivity and a high spatial resolution when the array is folded, we prove the concept of the folded perovskite detector design.
We present a fully printed temperature array yielding a total of 625 sensor pixel on a 12 mm by 12 mm area. Screen and aerosol jet printing are combined to fabricate the sensor stack. The active area features a bottom and top silver electrode sandwiching a thermoplastic based thermistor material. Due to the robust behavior towards humidity no encapsulation or special treatment was necessary. The sensor was operated between 0°C to 110°C exhibiting measurement accuracy of +/- 1°C. As demonstration, a laser was used to heat the sensor array locally and its beam properties and diameter could be observed.
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