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高效的范德瓦尔斯异质连接在Graphdiyne上向高性能光电探测器
Dinh Phuc Do1, Chengyun Hong2, Viet Q Bui3
1Department of Chemistry, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
概括
石墨烯 (GDY) 和二硫化物 (MoS2) 构成了高性能光探测器的有效的II型异质连接. 这种新的连接增强了电荷分离,抑制了重组,并实现了高响应性和速度的宽带检测.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 光电学是指光电子产品.
背景情况:
- Graphdiyne (GDY) 是一种具有直接带隙和高流动性的新型2D材料,对光探测器应用具有前景.
- 由于其独特的电子特性,GDY为基于石墨烯的异质连接的局限性提供了解决方案.
- 高效的电荷分离对于高性能光电探测器至关重要.
研究的目的:
- 报告一个高效的石墨/二硫化物 (GDY/MoS2) 类型II异质连接,用于先进的光探测器应用.
- 为了研究GDY/MoS2接口上的电荷分离和重组动态.
- 探索基于GDY的异质连接在光电子学中的潜力.
主要方法:
- 一个GDY/MoS2II型异质连接的制造.
- 异质连接的电子和光电子性能的表征.
- 测量光伏行为,电荷载体动态和光电探测器性能.
主要成果:
- 由于GDY的电子排斥丰富结构,GDY/MoS2异质连接表现出有效的电子孔对分离和转移.
- 与原始材料相比,在接口上的Auger重组被抑制了多达六倍,这归因于超快的热孔从MoS2转移到GDY.
- 该设备显示光伏行为,短路电流为-1.3 × 10^-5 A,开放电路电压为0.23 V.
- 来自GDY的阳性光效应在照明下增强了MoS2中的光流.
- 实现了宽带检测 (453-1064 nm),最大响应率为78.5 A/W,快速响应时间为50 μs.
结论:
- 开发的GDY/MoS2异质连接对高性能光探测器非常有效.
- GDY的独特特性促进了有效的电荷分离,抑制了重组,克服了现有材料的局限性.
- 这项工作提出了在先进的光电子设备中利用GDY的有希望的策略.
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