Li Jiajun, Guo Qihua, Tao Ye, Li Dalin, Yang Yiting, Zhou Dandan, Pan Jiangyong, Liu Xiang, Tao Zhi
School of Electronics & Information Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China.
College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China.
Nanomaterials (Basel). 2023 Apr 14;13(8):1364. doi: 10.3390/nano13081364.
The sensitivity and photoelectric noise of UV photodetectors are challenges that need to be overcome in pharmaceutical solute detection applications. This paper presents a new device concept for a CsPbBr3 QDs/ZnO nanowire heterojunction structure for phototransistors. The lattice match of the CsPbBr3 QDs and ZnO nanowire reduces the generation of trap centers and avoids carrier absorption by the composite center, which greatly improves the carrier mobility and high detectivity (8.13 × 10 Jones). It is worth noting that by using high-efficiency PVK quantum dots as the intrinsic sensing core, the device has a high responsivity (6381 A/W) and responsivity frequency (300 Hz). Thus, a UV detection system for pharmaceutical solute detection is demonstrated, and the type of solute in the chemical solution is estimated by the waveform and the size of the output 2f signals.
紫外光探测器的灵敏度和光电噪声是药物溶质检测应用中需要克服的挑战。本文提出了一种用于光电晶体管的CsPbBr₃量子点/ZnO纳米线异质结结构的新器件概念。CsPbBr₃量子点与ZnO纳米线的晶格匹配减少了陷阱中心的产生，并避免了复合中心对载流子的吸收，这大大提高了载流子迁移率和高探测率（8.13×10琼斯）。值得注意的是，通过使用高效的PVK量子点作为本征传感核心，该器件具有高响应度（6381 A/W）和响应频率（300 Hz）。因此，展示了一种用于药物溶质检测的紫外检测系统，并通过输出2f信号的波形和大小来估计化学溶液中溶质的类型。
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