A High-Performance WSe2/h-BN Photodetector using a Triphenylphosphine (PPh3)-Based n-Doping Technique

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• 作者：Seo-Hyeon Jo ; Dong-Ho Kang ; Jaewoo Shim ; Jaeho Jeon ; Min Hwan Jeon ; Gwangwe Yoo ; Jinok Kim ; Jaehyeong Lee ; Geun Young Yeom ; Sungjoo Lee ; Hyun-Yong Yu ; Changhwan Choi and Jin-Hong Park
• 刊名：Advanced Materials
• 出版年：2016
• 出版时间：June 22, 2016
• 年：2016
• 卷：28
• 期：24
• 页码：4824-4831
• 全文大小：1861K
• ISSN：1521-4095

文摘

The effects of triphenylphosphine (PPh₃)-based n-doping and hexagonal boron nitride (h-BN) insertion on a tungsten diselenide (WSe₂) photodetector are systematically studied, and a very high performance WSe₂/h-BN heterostucture-based photodetector is demonstrated with a record photoresponsivity (1.27 × 10⁶ A W⁻¹) and temporal photoresponse (rise time: 2.8 ms, decay time: 20.8 ms) under 520 nm wavelength and 5 pW power laser illumination.