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231225s2018 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201804450
|2 doi
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|a pubmed25n0964.xml
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|a (DE-627)NLM289312833
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|a (NLM)30295967
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Steele, Julian A
|e verfasserin
|4 aut
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|a Photophysical Pathways in Highly Sensitive Cs2 AgBiBr6 Double-Perovskite Single-Crystal X-Ray Detectors
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|c 2018
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 13.11.2018
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|a Date Revised 01.10.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a The sensitive detection of X-rays embodies an important research area, being motivated by a common desire to minimize the radiation doses required for detection. Among metal halide perovskites, the double-perovskite Cs2 AgBiBr6 system has emerged as a promising candidate for the detection of X-rays, capable of high X-ray stability and sensitivity (105 μC Gy-1 cm-2 ). Herein, the important photophysical pathways in single-crystal Cs2 AgBiBr6 are detailed at both room (RT) and liquid-nitrogen (LN2 T) temperatures, with emphasis made toward understanding the carrier dynamics that influence X-ray sensitivity. This study draws upon several optical probes and an RT excitation model is developed which is far from optimal, being plagued by a large trap density and fast free-carrier recombination pathways. Substantially improved operating conditions are revealed at 77 K, with a long fundamental carrier lifetime (>1.5 µs) and a marked depopulation of parasitic recombination pathways. The temperature dependence of a single-crystal Cs2 AgBiBr6 X-ray detecting device is characterized and a strong and monotonic enhancement to the X-ray sensitivity upon cooling is demonstrated, moving from 316 μC Gy-1 cm-2 at RT to 988 μC Gy-1 cm-2 near LN2 T. It is concluded that even modest cooling-via a Peltier device-will facilitate a substantial enhancement in device performance, ultimately lowering the radiation doses required
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|a Journal Article
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|a Cs2AgBiBr6
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|a X-ray detection
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|a double perovskite
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|a photophysics
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|a Pan, Weicheng
|e verfasserin
|4 aut
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|a Martin, Cristina
|e verfasserin
|4 aut
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|a Keshavarz, Masoumeh
|e verfasserin
|4 aut
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|a Debroye, Elke
|e verfasserin
|4 aut
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|a Yuan, Haifeng
|e verfasserin
|4 aut
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|a Banerjee, Subhasree
|e verfasserin
|4 aut
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|a Fron, Eduard
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|4 aut
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|a Jonckheere, Dries
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|4 aut
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|a Kim, Cheol Woong
|e verfasserin
|4 aut
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|a Baekelant, Wouter
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|4 aut
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|a Niu, Guangda
|e verfasserin
|4 aut
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|a Tang, Jiang
|e verfasserin
|4 aut
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|a Vanacken, Johan
|e verfasserin
|4 aut
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|a Van der Auweraer, Mark
|e verfasserin
|4 aut
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|a Hofkens, Johan
|e verfasserin
|4 aut
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|a Roeffaers, Maarten B J
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 30(2018), 46 vom: 30. Nov., Seite e1804450
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:30
|g year:2018
|g number:46
|g day:30
|g month:11
|g pages:e1804450
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|u http://dx.doi.org/10.1002/adma.201804450
|3 Volltext
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