高度稳定的半透明多层石墨烯/镧钒垂直异质结构光电探测器。

Highly stable semitransparent multilayer graphene/LaVOvertical-heterostructure photodetectors.

作者信息

Lee Jae Jun, Jung Dae Ho, Shin Dong Hee, Lee Hosun

机构信息

Department of Applied Physics, Institute of Natural Sciences, and Integrated Education Institute for Frontier Science and Technology (BK21 Four), Kyung Hee University, Yongin 17104, Republic of Korea.

Department of Physics, Andong National University, Andong, Gyeongbuk, 36729, Republic of Korea.

出版信息

Nanotechnology. 2022 Jul 4;33(39). doi: 10.1088/1361-6528/ac73a1.

DOI:10.1088/1361-6528/ac73a1

PMID:35617873

Abstract

A heterostructure composed of a combination of semi-metallic graphene (Gr) and high-absorption LaVOis ideal for high-performance translucent photodetector (PD) applications. Here, we present multilayer Gr/LaVOvertical-heterostructure semitransparent PDs with various layer numbers (). At= 2, the PD shows the best performance with a responsivity () of 0.094 A Wand a specific detectivity (*) of 7.385 × 10cm HzWat 532 nm. Additionally, the average visible transmittance of the PD is 63%, i.e. it is semitransparent. We increased photocurrent (PC) by approximately 13%, from 0.564 to 0.635A cmby using an Al reflector on the semitransparent PD. The PC of an unencapsulated PD maintains about 86% (from 0.571 to 0.493A cm) of its initial PC value after 2000 h at 25 °C temperature/30% relative humidity, showing good stability. This behavior is superior to that of previously reported graphene-based PDs. These results show that these PDs have great potential for semitransparent optoelectronic applications.

摘要

由半金属石墨烯（Gr）和高吸收性的LaVO组成的异质结构非常适合用于高性能半透明光电探测器（PD）应用。在此，我们展示了具有不同层数（）的多层Gr/LaVO垂直异质结构半透明PD。当 = 2时，该PD表现出最佳性能，在532 nm波长下响应度（）为0.094 A/W，比探测率（*）为7.385×10 cm Hz/W。此外，该PD的平均可见光透过率为63%，即它是半透明的。通过在半透明PD上使用铝反射器，我们将光电流（PC）提高了约13%，从0.564 A/cm增加到0.635 A/cm。在25°C温度/30%相对湿度下放置2000小时后，未封装的PD的PC保持其初始PC值的约86%（从0.571 A/cm降至0.493 A/cm），显示出良好的稳定性。这种性能优于先前报道的基于石墨烯的PD。这些结果表明，这些PD在半透明光电子应用中具有巨大潜力。