Heterostructured WS2/CH3NH3PbI3 Photoconductors with Suppressed Dark Current and Enhanced Photodetectivity

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• 作者：Chun Ma ; Yumeng Shi ; Weijin Hu ; Ming-Hui Chiu ; Zhixiong Liu ; Ashok Bera ; Feng Li ; Hong Wang ; Lain-Jong Li and Tom Wu
• 刊名：Advanced Materials
• 出版年：2016
• 出版时间：May 18, 2016
• 年：2016
• 卷：28
• 期：19
• 页码：3683-3689
• 全文大小：1529K
• ISSN：1521-4095

文摘

Heterostructured photoconductors based on hybrid perovskites and 2D transition-metal dichalcogenides are fabricated and characterized. Due to the superior properties of CH₃NH₃PbI₃ and WS₂, as well as the efficient interfacial charge transfer, such photoconductors show high performance with on/off ratio of ≈10⁵ and responsivity of ≈17 A W⁻¹. Furthermore, the response times of the heterostructured photoconductors are four orders of magnitude faster compared to the counterpart of a perovskite single layer.