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Optical properties and bridge photodetector integration of lead sulfide nanowires

机译:铅硫化物纳米线的光学性能和桥梁光电探测器集成

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We studied optical properties and photocurrent characteristics of PbS nanowires grown by chemical vapor deposition. Distinct bandedge photoluminescence (PL) emission was observed in the mid-infrared spectral range and the quantum confinement effect estimated from the PL peak energy was within 40 meV, consistent with the average diameter of the nanowire (similar to 70 nm) being significantly larger than the exciton Bohr radius (similar to 18 nm). We also demonstrated interdigit photo detectors making use of these PbS nanowires suspended between two pre-patterned Ti electrodes, where Ti also acted as metal catalyst for the nanowire growth. The threshold wavelength of the photocurrent was found to be similar to 3 mu m at room temperature.
机译:通过化学气相沉积研究了PBS纳米线的光学性质和光电流特性。 在中红外光谱范围内观察到不同的配音光致发光(PL)发射,并且从PL峰值能量估计的量子限制效果在40mEV范围内,与纳米线的平均直径一致(类似于70nm)明显大于 激子Bohr半径(类似于18 nm)。 我们还证明了使用这些PBS纳米线悬浮在两个预图案的Ti电极之间的interdigit照片探测器,其中Ti也用作纳米线生长的金属催化剂。 发现光电流的阈值波长在室温下类似于3μm。

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