基于PbS量子点光电探测器的脉搏检测系统研究

李力; 耿会娟; 张天昊; 朱建平

doi:10.37188/CO.2024-0018

基于PbS量子点光电探测器的脉搏检测系统研究

doi: 10.37188/CO.2024-0018

李力^1,,
耿会娟^{2, 3,},
张天昊^3,,
朱建平^1, ,

1.
上海海洋大学工程学院, 上海 200000
2.
安阳师范学院物理与电气工程学院, 河南安阳 455000
3.
上海交通大学电子信息与电气工程学院薄膜与微细技术教育部重点实验室, 上海 200240

基金项目: 上海市自然科学基金（No. 19ZR1426900）；上海交通大学深蓝计划（No. SL2020MS001）；河南省科技攻关项目（No. 242102240050）

详细信息

作者简介:
朱建平（1977—），女，上海人，博士，副教授，硕士生导师，主要从事无线传感器、检测技术研究工作。E-mail：jp-zhu@shou.edu.cn

中图分类号: TP212.9
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出版历程
- 收稿日期: 2024-01-17
- 修回日期: 2024-02-22
- 录用日期: 2024-04-26
- 网络出版日期: 2024-05-14

Research on pulse detection system based on PbS quantum dot photodetector

LI Li^1
,,
GENG Hui-juan^{2, 3
,},
ZHANG Tian-hao^3
,,
ZHU Jian-ping^{1
, ,}

1.
School of Engineering, Shanghai Ocean University, Shanghai 200000, China
2.
School of Physics & Electrical Engineering, Anyang Normal University, Anyang 455000, China
3.
Key Laboratory for Thin Film and Microfabcrication Technology (Ministry of Education), School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Funds: Supported by the Shanghai Natural Science Foundation (No. 19ZR1426900); Shanghai Jiao Tong University Deep Blue Program (No. SL2020MS001); Henan Province Science and Technology Research Project (No. 242102240050)

More Information

Corresponding author: jp-zhu@shou.edu.cn

摘要

摘要:
脉搏蕴含人体丰富的血流信息，检测脉搏并推导出人体心血管系统健康状态正成为研究的热点。本文利用热注射法合成得到尺寸为3 nm的PbS量子点，在金叉指电极表面通过旋涂的方法构筑PbS量子点光电探测器。基于已制备的PbS量子点光电探测器研制了数据可视化的脉搏检测系统。运用光电容积脉搏波描记法，对同一测试者不同运动状态以及不同测试者同一运动状态进行测量，经过电路处理将测得的数据显示在电子显示屏上。结果表明，探测器在15.2 μW·cm⁻²光强度照射下，其响应度(R)和探测率(D*)在−3 V偏压下分别为0.33 A/W和1.33×10¹² Jones。将其应用于测量脉搏电路中，系统能够有效接收并测得人体脉搏信号。上述结果表明基于PbS量子点光电探测器的脉搏检测系统在灵敏度、稳定性以及可靠性均满足应用要求。
- 硫化铅量子点 /
- 光电探测器 /
- 光电容积脉搏波描记法 /
- 脉搏波测量
Abstract:
As the pulse contains rich blood flow information of the human body, detecting the pulse and deducing the health status of human cardiovascular system are becoming a hot spot. In this study, PbS quantum dots with a size of 3 nm were synthesized using the hot injection method, and a PbS quantum dot photodetector was constructed on the surface of gold forked finger electrode through spin coating. Based on the prepared PbS quantum dot photodetector, a data visualization pulse detection system was developed. Using the optoelectronic capacitance pulse wave recording method, the same tester was measured under different exercise states and different testers were measured under the same exercise state. The measured data was displayed on the electronic display screen through circuit processing. The results show that under the illumination of 15.2 μW·cm⁻² light intensity, its responsivity (R) and light detection rate (D*) are 0.33 A/W and 1.33×10¹² Jones under −3 V bias voltage, respectively. When used in a pulse measurement circuit, the system can effectively receive and measure the human pulse signal. It can be concluded that the pulse detection system based on the PbS quantum dot photodetector meets the application requirements regarding sensitivity, stability, and reliability.
- PbS QDs /
- photoelectric detector /
- photoplethysmography /
- pulse detection sensor

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图 1 可视化脉搏检测系统前端电路原理图

Figure 1. Schematic diagram of the front-end circuit of the visual pulse detection system

下载: 全尺寸图片幻灯片

图 2 PbS光电探测器的各项测试结果。(a) 所制备材料的XRD数据图；(b) PbS量子点的TEM图，插图为PbS量子点的直径大小分布直方图；(c) PbS光电探测器的SEM图；(d) PbS光电探测器的SEM-EDS图

Figure 2. Performance test results of photodetector. (a) XRD data of PbS quantum dots; (b) TEM of PbS quantum dots, the illustration is a histogram showing the distribution of diameter sizes of PbS quantum dots, (c) SEM of PbS photodetectors, (d) SEM-EDS of PbS photodetector

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图 3 (a) PbS量子点光电探测器在不同光功率密度下的电流-电压（I-V）图；(b) −3 V偏压下PbS量子点光电探测器在不同光功率密度下的电流-时间(I-T)图；(c) PbS量子点光电探测器在9390 μW·cm⁻²光强下的响应时间图；(d) PbS光电探测器件在不同光功率密度下的响应度曲线图和比探测率曲线图

Figure 3. (a) Current-voltage (I-V) diagram of PbS quantum dot photodetector at different optical power densities; (b) current-time (I-T) diagram of PbS quantum dot photodetector at different optical power densities when bias is −3 V; (c) response time of PbS quantum dot photodetector at 9390 μW·cm⁻² light intensity, (d) responsivity curve and specific detection rate curve of PbS photodetector at different optical power densities

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图 4 (a) 基于PbS量子点光电探测器的可视化脉搏检测系统实物图；(b) 系统实测时电子显示屏显示图

Figure 4. (a) The physical image of the visual pulse detection system based on the PbS quantum dot photodetector; (b) the display diagram of the electronic display screen during the actual measurement of the system

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图 5 同一测试者不同运动状态时的脉搏变化图

Figure 5. Pulse changes of the same test subject at different motor states

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图 6 (a) 不同测试者同一运动状态的脉搏变化图；(b) 同一测试者不同测试时间的脉搏变化图

Figure 6. (a) Pulse change plot of different testers at the same exercise state; (b) pulse change plot of the same tester at different test times

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图 7 同一测试者不同检测系统的电压示意图

Figure 7. Voltage diagram of the same tester tested by different test systems

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表 1 两种系统脉搏检测结果统计表

Table 1. Statistical table of pulse test results of the two systems (Unit: times/minute)

名称第一次测试第二次测试第三次测试

PbS量子点光电探测器 63 73 68
gladstone 64 70 73

下载: 导出CSV

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