Paper-Based ZnS:Cu Alternating Current Electroluminescent Devices for Current Humidity Sensors with High–Linearity and Flexibility
Humidity sensors are indispensable for various electronic systems and instrumentations. To develop a new humidity sensing mechanism is the key for the next generation of sensor technology. In this work, a novel flexible paper-based current humidity sensor is proposed. The developed alternating curre...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-10-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/19/21/4607 |
| _version_ | 1828276896238927872 |
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| author | Yaqin He Mengyao Zhang Nan Zhang Danrong Zhu Chun Huang Ling Kang Xiaofeng Zhou Menghan Hu Jian Zhang |
| author_facet | Yaqin He Mengyao Zhang Nan Zhang Danrong Zhu Chun Huang Ling Kang Xiaofeng Zhou Menghan Hu Jian Zhang |
| author_sort | Yaqin He |
| collection | DOAJ |
| description | Humidity sensors are indispensable for various electronic systems and instrumentations. To develop a new humidity sensing mechanism is the key for the next generation of sensor technology. In this work, a novel flexible paper-based current humidity sensor is proposed. The developed alternating current electroluminescent devices (ACEL) consist of the electroless plating Ni on filter paper and silver nanowires (AgNWs) as the bottom and upper electrodes, and ZnS:Cu as the phosphor layer, respectively. The proposed humidity sensor is based on ACEL with the paper substrate and the ZnS:Cu phosphor layer as the humidity sensing element. The moisture effect on the optical properties of ACELs has been studied firstly. Then, the processing parameters of the paper-based ACELs such as electroless plated bottom electrode and spin-coated phosphor layer as a function of the humidity-sensitive characteristics are investigated. The sensing mechanism of the proposed sensor has been elucidated based on the <inline-formula> <math display="inline"> <semantics> <mrow> <mi>Q</mi> <mo>~</mo> <mi>V</mi> </mrow> </semantics> </math> </inline-formula> analysis. The sensor exhibits an excellent linearity (<inline-formula> <math display="inline"> <semantics> <mrow> <msup> <mi>R</mi> <mn>2</mn> </msup> <mo>=</mo> <mn>0.99965</mn> </mrow> </semantics> </math> </inline-formula>) within the humidity range from 20% to 90% relative humidity (RH) and shows excellent flexibility. We also demonstrate its potential application in postharvest preservation where the EL light is used for preservation and the humidity can be monitored simultaneously through the current. |
| first_indexed | 2024-04-13T07:05:43Z |
| format | Article |
| id | doaj.art-a482a536451a4ed2a7d37c53e66ff679 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T07:05:43Z |
| publishDate | 2019-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-a482a536451a4ed2a7d37c53e66ff6792022-12-22T02:57:00ZengMDPI AGSensors1424-82202019-10-011921460710.3390/s19214607s19214607Paper-Based ZnS:Cu Alternating Current Electroluminescent Devices for Current Humidity Sensors with High–Linearity and FlexibilityYaqin He0Mengyao Zhang1Nan Zhang2Danrong Zhu3Chun Huang4Ling Kang5Xiaofeng Zhou6Menghan Hu7Jian Zhang8Shanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, 500 Dongchuan Road, Shanghai 200241, ChinaShanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, 500 Dongchuan Road, Shanghai 200241, ChinaShanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, 500 Dongchuan Road, Shanghai 200241, ChinaShanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, 500 Dongchuan Road, Shanghai 200241, ChinaShanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, 500 Dongchuan Road, Shanghai 200241, ChinaShanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, 500 Dongchuan Road, Shanghai 200241, ChinaShanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, 500 Dongchuan Road, Shanghai 200241, ChinaShanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, 500 Dongchuan Road, Shanghai 200241, ChinaShanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, 500 Dongchuan Road, Shanghai 200241, ChinaHumidity sensors are indispensable for various electronic systems and instrumentations. To develop a new humidity sensing mechanism is the key for the next generation of sensor technology. In this work, a novel flexible paper-based current humidity sensor is proposed. The developed alternating current electroluminescent devices (ACEL) consist of the electroless plating Ni on filter paper and silver nanowires (AgNWs) as the bottom and upper electrodes, and ZnS:Cu as the phosphor layer, respectively. The proposed humidity sensor is based on ACEL with the paper substrate and the ZnS:Cu phosphor layer as the humidity sensing element. The moisture effect on the optical properties of ACELs has been studied firstly. Then, the processing parameters of the paper-based ACELs such as electroless plated bottom electrode and spin-coated phosphor layer as a function of the humidity-sensitive characteristics are investigated. The sensing mechanism of the proposed sensor has been elucidated based on the <inline-formula> <math display="inline"> <semantics> <mrow> <mi>Q</mi> <mo>~</mo> <mi>V</mi> </mrow> </semantics> </math> </inline-formula> analysis. The sensor exhibits an excellent linearity (<inline-formula> <math display="inline"> <semantics> <mrow> <msup> <mi>R</mi> <mn>2</mn> </msup> <mo>=</mo> <mn>0.99965</mn> </mrow> </semantics> </math> </inline-formula>) within the humidity range from 20% to 90% relative humidity (RH) and shows excellent flexibility. We also demonstrate its potential application in postharvest preservation where the EL light is used for preservation and the humidity can be monitored simultaneously through the current.https://www.mdpi.com/1424-8220/19/21/4607paper-based acelcapacitive humidity sensorzns:cuflexiblehigh–linearity |
| spellingShingle | Yaqin He Mengyao Zhang Nan Zhang Danrong Zhu Chun Huang Ling Kang Xiaofeng Zhou Menghan Hu Jian Zhang Paper-Based ZnS:Cu Alternating Current Electroluminescent Devices for Current Humidity Sensors with High–Linearity and Flexibility Sensors paper-based acel capacitive humidity sensor zns:cu flexible high–linearity |
| title | Paper-Based ZnS:Cu Alternating Current Electroluminescent Devices for Current Humidity Sensors with High–Linearity and Flexibility |
| title_full | Paper-Based ZnS:Cu Alternating Current Electroluminescent Devices for Current Humidity Sensors with High–Linearity and Flexibility |
| title_fullStr | Paper-Based ZnS:Cu Alternating Current Electroluminescent Devices for Current Humidity Sensors with High–Linearity and Flexibility |
| title_full_unstemmed | Paper-Based ZnS:Cu Alternating Current Electroluminescent Devices for Current Humidity Sensors with High–Linearity and Flexibility |
| title_short | Paper-Based ZnS:Cu Alternating Current Electroluminescent Devices for Current Humidity Sensors with High–Linearity and Flexibility |
| title_sort | paper based zns cu alternating current electroluminescent devices for current humidity sensors with high linearity and flexibility |
| topic | paper-based acel capacitive humidity sensor zns:cu flexible high–linearity |
| url | https://www.mdpi.com/1424-8220/19/21/4607 |
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