Self-Healing Cs_3Bi_2Br_3I_6 Perovskite Wafers for X-Ray Detection

Daum Manuel; Deumel Sarah; Sytnyk MykhailoAfify Hany A.Hock RainerEigen AndreasZhao BaolinHalik MarusThese AlbertMatt Gebhard J.Brabec Christoph J.Tedde Sandro F.Heiss Wolfgang

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Self-Healing Cs_3Bi_2Br_3I_6 Perovskite Wafers for X-Ray Detection

机译：Self-Healing Cs_3Bi_2Br_3I_6 Perovskite Wafers for X-Ray Detection

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Self-healing of defects imposed by external stimuli such as high energy radiation is a possibility to sustain the operational lifetime of electronic devices such as radiation detectors. Cs3Bi2Br3I6 polycrystalline wafers are introduced here as novel X-ray detector material, which not only guarantees a high X-ray stopping power due to its composition with elements with high atomic numbers, but also outperforms other Bi-based semiconductors in respect to detector parameters such as detection limit, transient behavior, or dark current. The polycrystalline wafers represent a size scalable technology suitable for future integration in imager devices for medical applications. Most astonishingly, aging of these wafer-based devices results in an overall improvement of the detector performance-dark currents are reduced, photocurrents are increased, and one of the most problematic properties of X-ray detectors, the base line drift is reduced by orders of magnitude. These aging induced improvements indicate self-healing effects which are shown to result from recrystallization. Optimized synthetic conditions also improve the as prepared X-ray detectors; however, the aged device outperforms all others. Thus, self-healing acts in Cs3Bi2Br3I6 as an optimization tool, which is certainly not restricted to this single compound, it is expected to be beneficial also for many further polycrystalline ionic semiconductors.

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《Advanced functional materials》 |2021年第47期|2102713.1-2102713.10|共10页
作者
Daum Manuel; Deumel Sarah; Sytnyk MykhailoAfify Hany A.Hock RainerEigen AndreasZhao BaolinHalik MarusThese AlbertMatt Gebhard J.Brabec Christoph J.Tedde Sandro F.Heiss Wolfgang;
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Friedrich Alexander Univ Erlangen Nurnberg, Inst Mat Elect & Energy Technol I MEET, Dept Mat Sci & Engn, Energy Campus Nurnberg,Furtherstr 250, D-90429 Nurnberg, Germany;

Friedrich Alexander Univ Erlangen Nurnberg, Inst Mat Elect & Energy Technol I MEET, Dept Mat Sci & Engn, Energy Campus Nurnberg,Furtherstr 250, D-90429 Nurnberg, Germany|Siemens HealthineersAG, Technol Excellence, Guenther Scharowsky Str 1, D-91058 Erlang;

Friedrich Alexander Univ Erlangen Nuremberg, Inst Crystallog & Struct Phys ICPS, Phys Dept, Staudtstr 3, D-91058 Erlangen, GermanyFriedrich Alexander Univ Erlangen Nurnberg, Organ Mat & Devices OMD, Inst Polymer Mat Interdisziplinares Zentrum Nanos, Cauerstr 3, D-91058 Erlangen, GermanyFriedrich Alexander Univ Erlangen Nurnberg, Inst Mat Elect & Energy Technol, Dept Mat Sci & Engn, Martensstr 7, D-91058 Erlangen, GermanyFriedrich Alexander Univ Erlangen Nurnberg, Inst Mat Elect & Energy Technol, Dept Mat Sci & Engn, Martensstr 7, D-91058 Erlangen, Germany|Helmholtz Inst Erlangen Nurnberg, Immerwahrstr 2, D-91058 Erlangen, GermanySiemens HealthineersAG, Technol Excellence, Guenther Scharowsky Str 1, D-91058 Erlangen, Germany;

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bismuth halides; lead-free perovskites; photoconductors; self-healing; X-ray detection;

Self-Healing Cs_3Bi_2Br_3I_6 Perovskite Wafers for X-Ray Detection

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