National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yutian Road, Shanghai 200083, China.; University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, China.
National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yutian Road, Shanghai 200083, China.
Sci Adv. 2016 Aug 12;2(8):e1600027. doi: 10.1126/sciadv.1600027. eCollection 2016 Aug.
Three-dimensional (3D) design and manufacturing enable flexible nanomembranes to deliver unique properties and applications in flexible electronics, photovoltaics, and photonics. We demonstrate that a quantum well (QW)-embedded nanomembrane in a rolled-up geometry facilitates a 3D QW infrared photodetector (QWIP) device with enhanced responsivity and detectivity. Circular geometry of nanomembrane rolls provides the light coupling route; thus, there are no external light coupling structures, which are normally necessary for QWIPs. This 3D QWIP device under tube-based light-trapping mode presents broadband enhancement of coupling efficiency and omnidirectional detection under a wide incident angle (±70°), offering a unique solution to high-performance focal plane array. The winding number of these rolled-up QWIPs provides well-tunable blackbody photocurrents and responsivity. 3D self-assembly of functional nanomembranes offers a new path for high conversion efficiency between light and electricity in photodetectors, solar cells, and light-emitting diodes.
三维（3D）设计和制造使灵活的纳米膜能够在灵活的电子产品、光伏和光子学中提供独特的性能和应用。我们证明，在卷成的几何形状中嵌入量子阱（QW）的纳米膜促进了具有增强的响应率和探测率的 3D QW 红外光电探测器（QWIP）器件。纳米膜卷的圆形几何形状提供了光耦合路径；因此，没有通常对于 QWIP 所需的外部光耦合结构。这种基于管的光捕获模式下的 3D QWIP 器件在宽入射角（±70°）下呈现宽带增强的耦合效率和全向检测，为高性能焦平面阵列提供了独特的解决方案。这些卷绕 QWIP 的匝数提供了可良好调节的黑体光电流和响应率。功能纳米膜的 3D 自组装为光电探测器、太阳能电池和发光二极管中光与电之间的高转换效率提供了新途径。
