1 华南师范大学半导体科学与技术学院，广东 广州 510631
2 东莞南方半导体科技有限公司，广东 东莞 523781
界面工程是提高光电探测器性能的有效方法之一。报道了基于界面工程调控的石墨烯（Gr，2D）/GaN（3D）范德瓦耳斯异质结紫外光电探测器。GaN吸收光子产生电子空穴对，并在内建电场作用下发生分离。其中，光生空穴利用隧穿效应向Gr一侧迁移，而光生电子向GaN一侧迁移。在较高的电场驱动下，载流子将发生碰撞，造成光电流倍增，使得器件的光吸收效率与光电转化效率有明显提升。因此，器件在-2 V偏压条件和5 μW/cm2紫外光照射下，展示出较高的响应度（395.2 A/W）和较大的探测率（4.425×1015 Jones）值。该研究丰富了界面工程技术在Gr基紫外光电探测器的应用，为制备高性能紫外探测器提供了可能。
氮化镓 二维/三维 金属有机化学气相沉积 紫外探测器 激光与光电子学进展
2024, 61(3): 0304001
Author Affiliations
Abstract
1 Key Laboratory of Cardiovascular Remodeling and Function Research, Department of Cardiology, Qilu Hospital of Shandong University, Jinan 250012, China
2 MOE Key Laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
3 Department of Cardiology, The Juye Hospital of Traditional Chinese Medicine, Heze 274900, China
Photoacoustic imaging (PAI) has been used to characterize the spatial and quantitative features of lipid-rich atherosclerotic plaques with high sensitivity and specificity. In this Letter, we first validate that the ultra-low temperature and formaldehyde treatment have no effect on photoacoustic characteristics of the artery samples. Comparative experiments between the PAI and histological results demonstrate that the ultra-low temperature or formaldehyde treatment has few effects on the PAI of the lipid-rich atherosclerotic plaques; the lipid relative concentration and the lipid percentage by PAI hold high correlation with histology.
170.5120 Photoacoustic imaging Chinese Optics Letters
2018, 16(3): 031702
