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Solution‐Processed MAPbBr3 and CsPbBr3 Single‐Crystal Detectors with Improved X‐Ray Sensitivity via Interfacial Engineering
Physica Status Solidi (A) - Applications and Materials Science Pub Date : 2020-03-26 , DOI: 10.1002/pssa.202000104 Zhengfang Fan 1 , Jiang Liu 1 , Wentao Zuo 1 , Guoqiang Liu 1 , Xulin He 1 , Kun Luo 1 , Qinyan Ye 1 , Cheng Liao 1
Physica Status Solidi (A) - Applications and Materials Science Pub Date : 2020-03-26 , DOI: 10.1002/pssa.202000104 Zhengfang Fan 1 , Jiang Liu 1 , Wentao Zuo 1 , Guoqiang Liu 1 , Xulin He 1 , Kun Luo 1 , Qinyan Ye 1 , Cheng Liao 1
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Organic–inorganic hybrid perovskites have been recognized as prospective materials for use in radiation detection application due to their high atomic number, ease of crystal processing, and excellent electronic properties. Herein, solution‐synthesized MAPbBr3 and CsPbBr3 detectors with different structures are constructed. Charge diffusion length and trap density analysis reveal that CsPbBr3 possesses better thermal stability but worse charge‐transport properties than MAPbBr3. To improve the signal current under X‐ray radiation, MoO3 is applied as a hole‐extraction layer to increase hole‐carrier collection. The sensitivity of X‐ray detectors with MoO3 layer can reach up to 2552 μC Gyair−1 cm−2 at an electric field of 45 V cm−1, which is higher than that without the MoO3 layer. It is shown that charge‐transport capability significantly affects the response of the signal current to X‐ray radiation; it also reveals the importance of interface engineering as a means to realize high‐sensitivity X‐ray detectors.
中文翻译：
通过界面工程解决方案处理的MAPbBr3和CsPbBr3单晶探测器具有增强的X射线敏感性
由于有机-无机杂化钙钛矿的原子序数高，易于晶体加工以及具有出色的电子性能，因此被公认为用于辐射检测的潜在材料。在此，构建了具有不同结构的溶液合成的MAPbBr 3和CsPbBr 3检测器。电荷扩散长度和陷阱密度分析表明CsPbBr 3具有更好的热稳定性，但比MAPbBr更糟电荷传输性质3。为了改善X射线辐射下的信号电流，MoO 3被用作空穴提取层，以增加空穴载体的收集。具有MoO 3的X射线探测器的灵敏度该层在45 V cm -1的电场下可达到2552μCGy空气-1 cm -2，这比没有MoO 3层的电场高。结果表明，电荷传输能力显着影响信号电流对X射线辐射的响应。它还揭示了接口工程作为实现高灵敏度X射线探测器的一种手段的重要性。
更新日期：2020-03-26
中文翻译：
通过界面工程解决方案处理的MAPbBr3和CsPbBr3单晶探测器具有增强的X射线敏感性
由于有机-无机杂化钙钛矿的原子序数高，易于晶体加工以及具有出色的电子性能，因此被公认为用于辐射检测的潜在材料。在此，构建了具有不同结构的溶液合成的MAPbBr 3和CsPbBr 3检测器。电荷扩散长度和陷阱密度分析表明CsPbBr 3具有更好的热稳定性，但比MAPbBr更糟电荷传输性质3。为了改善X射线辐射下的信号电流，MoO 3被用作空穴提取层，以增加空穴载体的收集。具有MoO 3的X射线探测器的灵敏度该层在45 V cm -1的电场下可达到2552μCGy空气-1 cm -2，这比没有MoO 3层的电场高。结果表明，电荷传输能力显着影响信号电流对X射线辐射的响应。它还揭示了接口工程作为实现高灵敏度X射线探测器的一种手段的重要性。
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