Details

Autor(en) / Beteiligte

• Thirimanne, H M
• Jayawardena, K D G I
• Parnell, A J
• Bandara, R M I
• Karalasingam, A
• Pani, S
• Huerdler, J E
• Lidzey, D G
• Tedde, S F
• Nisbet, A
• Mills, C A
• Silva, S R P

Titel

High sensitivity organic inorganic hybrid X-ray detectors with direct transduction and broadband response

Ist Teil von

• Nature communications, 2018-07, Vol.9 (1), p.2926-10, Article 2926

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2018

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• X-ray detectors are critical to healthcare diagnostics, cancer therapy and homeland security, with many potential uses limited by system cost and/or detector dimensions. Current X-ray detector sensitivities are limited by the bulk X-ray attenuation of the materials and consequently necessitate thick crystals (~1 mm-1 cm), resulting in rigid structures, high operational voltages and high cost. Here we present a disruptive, flexible, low cost, broadband, and high sensitivity direct X-ray transduction technology produced by embedding high atomic number bismuth oxide nanoparticles in an organic bulk heterojunction. These hybrid detectors demonstrate sensitivities of 1712 µC mGy  cm for "soft" X-rays and ~30 and 58 µC mGy  cm under 6 and 15 MV "hard" X-rays generated from a medical linear accelerator; strongly competing with the current solid state detectors, all achieved at low bias voltages (-10 V) and low power, enabling detector operation powered by coin cell batteries.