{"title":"通过蓝光发射量子点的能量下移机制实现用于环境分析的紫外线 CMOS 图像传感器","authors":"Ui-Hyun Jeong, Jea-Gun Park","doi":"10.1007/s40042-024-01132-5","DOIUrl":null,"url":null,"abstract":"<div><p>Recently, there has been a global societal focus on the management of air pollution. Measurements of air pollution are conducted using various methods depending on the pollutants, including ultraviolet (UV) absorption methods for ozone (O<sub>3</sub>) and fluorescence methods for sulfur dioxide (SO<sub>2</sub>). However, the conventional silicon-based complementary metal–oxide–semiconductor image sensor (Si-CIS) is not suitable for UV measurements due to the low quantum efficiency (QE) of silicon for UV light. Consequently, different types of detection sensors are used for different air pollutants, leading to limitations in measurement locations and resulting in errors depending on the installation position. To address these limitations, we propose a quantum dot complementary metal–oxide–semiconductor image sensor (QD-CIS) capable of imaging UV light using the energy-down-shift (EDS) mechanism of quantum dots (QDs). The synthesized QDs absorb light at UV wavelengths, convert it into visible blue light through EDS, and emit luminescence. The converted intensity allows the detection of UV intensity by the CIS. Through the designed QD-CIS and UV LED illumination, we measured the sensitivity to changes in the concentrations of the representative air pollutants NO<sub>2</sub> and SO<sub>2</sub>. The results showed a sensitivity increase of 6.83 times for NO<sub>2</sub> and 21.39 times for SO<sub>2</sub> compared to conventional CIS. This suggests the potential of UV imaging to overcome these limitations using existing CIS components.</p></div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8000,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ultraviolet CMOS image sensor for environment analysis via energy-down-shift mechanism of blue-light emitting quantum dots\",\"authors\":\"Ui-Hyun Jeong, Jea-Gun Park\",\"doi\":\"10.1007/s40042-024-01132-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Recently, there has been a global societal focus on the management of air pollution. Measurements of air pollution are conducted using various methods depending on the pollutants, including ultraviolet (UV) absorption methods for ozone (O<sub>3</sub>) and fluorescence methods for sulfur dioxide (SO<sub>2</sub>). However, the conventional silicon-based complementary metal–oxide–semiconductor image sensor (Si-CIS) is not suitable for UV measurements due to the low quantum efficiency (QE) of silicon for UV light. Consequently, different types of detection sensors are used for different air pollutants, leading to limitations in measurement locations and resulting in errors depending on the installation position. To address these limitations, we propose a quantum dot complementary metal–oxide–semiconductor image sensor (QD-CIS) capable of imaging UV light using the energy-down-shift (EDS) mechanism of quantum dots (QDs). The synthesized QDs absorb light at UV wavelengths, convert it into visible blue light through EDS, and emit luminescence. The converted intensity allows the detection of UV intensity by the CIS. Through the designed QD-CIS and UV LED illumination, we measured the sensitivity to changes in the concentrations of the representative air pollutants NO<sub>2</sub> and SO<sub>2</sub>. The results showed a sensitivity increase of 6.83 times for NO<sub>2</sub> and 21.39 times for SO<sub>2</sub> compared to conventional CIS. This suggests the potential of UV imaging to overcome these limitations using existing CIS components.</p></div>\",\"PeriodicalId\":677,\"journal\":{\"name\":\"Journal of the Korean Physical Society\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.8000,\"publicationDate\":\"2024-08-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of the Korean Physical Society\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s40042-024-01132-5\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"PHYSICS, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Korean Physical Society","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s40042-024-01132-5","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
Ultraviolet CMOS image sensor for environment analysis via energy-down-shift mechanism of blue-light emitting quantum dots
Recently, there has been a global societal focus on the management of air pollution. Measurements of air pollution are conducted using various methods depending on the pollutants, including ultraviolet (UV) absorption methods for ozone (O3) and fluorescence methods for sulfur dioxide (SO2). However, the conventional silicon-based complementary metal–oxide–semiconductor image sensor (Si-CIS) is not suitable for UV measurements due to the low quantum efficiency (QE) of silicon for UV light. Consequently, different types of detection sensors are used for different air pollutants, leading to limitations in measurement locations and resulting in errors depending on the installation position. To address these limitations, we propose a quantum dot complementary metal–oxide–semiconductor image sensor (QD-CIS) capable of imaging UV light using the energy-down-shift (EDS) mechanism of quantum dots (QDs). The synthesized QDs absorb light at UV wavelengths, convert it into visible blue light through EDS, and emit luminescence. The converted intensity allows the detection of UV intensity by the CIS. Through the designed QD-CIS and UV LED illumination, we measured the sensitivity to changes in the concentrations of the representative air pollutants NO2 and SO2. The results showed a sensitivity increase of 6.83 times for NO2 and 21.39 times for SO2 compared to conventional CIS. This suggests the potential of UV imaging to overcome these limitations using existing CIS components.
期刊介绍:
The Journal of the Korean Physical Society (JKPS) covers all fields of physics spanning from statistical physics and condensed matter physics to particle physics. The manuscript to be published in JKPS is required to hold the originality, significance, and recent completeness. The journal is composed of Full paper, Letters, and Brief sections. In addition, featured articles with outstanding results are selected by the Editorial board and introduced in the online version. For emphasis on aspect of international journal, several world-distinguished researchers join the Editorial board. High quality of papers may be express-published when it is recommended or requested.