电子元器件产品null检测 | 形态与电荷复合对基于共轭聚合物的近红外光电探测器性能的影响-北京欧兰科技发展有限公司

方案摘要

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应用领域	电子/电气
检测样本	电子元器件产品
检测项目
参考标准	暂无

采用立陶宛Ekspla公司纳秒激光泵浦光学参量振荡器NT342A-10，输出激光10Hz, 波长860nm，结合1台150W连续氙灯研究了近红外光电探测器瞬态光伏弛豫性能。

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配置单

Ekspla NT340 高能量可调谐激光器（OPO）
型号：NT340

¥50万 - 100万
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方案详情

Near-infrared (NIR) photodetectors sensitive to 860 nm light were fabricated through a solution process using two different conjugated polymers (CPs) that share a similar conjugated backbone consisting of a diketopyrrolopyrrole (DPP) moiety. The two CPs had a comparable conjugated nature, but their detection capabilities were significantly different depending on the applied linker units, namely thiophene for PDPP-T and fluorinated
thiophene for PDPP-FBT. First, we revealed that employing an additive during active film preparation was beneficial for achieving an optimum film morphology for both CPs, which could suppress dark current and provide enhanced detectivity. In addition, when a highly electronegative fluorine atom, which induces a surface dipole, was introduced into the conjugated skeleton, it was clearly demonstrated via transient photovoltage measurements that the charge recombination time was lengthened, which implies an increase in the probability of charge extraction in actual devices by suppressing charge recombination. Thus, PDPP-FBT exhibited higher external quantum efficiency and responsivity across all wavelengths. Our results indicated that the management of both film morphology and surface dipoles of CPs are equally important for achieving high detectivity and responsivity in organic NIR photodetectors.

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北京欧兰科技发展有限公司

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