论文标题
高灵敏度混合PBS CQD-TMDC光电电视器最多2 $μ$ m
High Sensitivity Hybrid PbS CQD-TMDC Photodetectors up to 2 $μ$m
论文作者
论文摘要
开发具有高灵敏度，宽带光谱覆盖，与硅电子易于集成和低成本的红外光探测器的最新方法是基于过渡金属二甲藻元化（TMDC）（TMDC）和PBS胶体量子点（CQDS）的混合结构。但是，迄今为止，据报道，此类光电探测器的灵敏度高达1.5 $ m $ m。在这里，我们将该技术的频谱覆盖范围扩展到2 $μ$ m，这是首次引人注目的表现，并以1.8 $μ$ m为1400 a/w，在室温下，具有1V偏置和检测高达$ 10^{12} $ jones。 To do this we studied two TMDC materials as a carrier transport layer, tungsten disulfide (WS$_2$) and molybdenum disulfide (MoS$_2$) and demonstrate that WS$_2$ based hybrid photodetectors outperform those of MoS$_2$ due to a more adequate band alignment that favors carrier transfer from the CQDs.
Recent approaches to develop infrared photodetectors characterized by high sensitivities, broadband spectral coverage, easy integration with silicon electronics and low cost have been based on hybrid structures of transition metal dichalcogenides (TMDCs) and PbS colloidal quantum dots (CQDs). However, to date, such photodetectors have been reported with high sensitivity up to 1.5 $μ$m. Here we extend the spectral coverage of this technology towards 2 $μ$m demonstrating for the first time compelling performance with responsivities 1400 A/W at 1.8 $μ$m with 1V bias and detectivities as high as $10^{12}$ Jones at room temperature. To do this we studied two TMDC materials as a carrier transport layer, tungsten disulfide (WS$_2$) and molybdenum disulfide (MoS$_2$) and demonstrate that WS$_2$ based hybrid photodetectors outperform those of MoS$_2$ due to a more adequate band alignment that favors carrier transfer from the CQDs.
