Pub Date : 2021-12-06DOI: 10.1109/SSLChinaIFWS54608.2021.9675209
Guoshuai Dong, Fanny Zhao, Hao Wu, Guoming Yang, Ronghua Deng, Brian Shieh, S. W. R. Lee
The KrCl Excimer lamps (Excilamps) with 222nm peak wavelength have been developed for 20 years, however, there are few researches found regarding on their life projection. To insure the enough radiation for the important inactivating effectiveness during the service life, this work focuses on irradiance maintenance of KrCl Excilamps at different tube wall temperatures. In general, the activation energy of the Arrhenius equation modelling the lifetime for electronic products suffering from temperature stress below 500K can be considered as temperature-independent. However, due to the unique configuration of KrCl Excilamps without the electrodes inside their tubes and the chemical reaction of Chlorine with the quartz tube wall, their degradation model might need to be verified. In our study, the irradiance of the KrCl Excilamps at tube temperatures around 80, 90 and 100°C for 1000 hours was investigated to find the associated rate coefficients using the exponential and the logarithmic least square curve-fitting. For the better accuracy of life projection, the power-law and the linear relations with temperature are assumed to obtain the temperature-dependent Arrhenius parameters: the pre-exponential factor and the activation energy of the Arrhenius Equation. It is found that the life projection based on the irradiance maintenance can be obtained with a better agreement by the temperature-dependent models using the logarithmic least square curve-fitting for the KrCl Excilamps with 222nm peak wavelength.
{"title":"Life Projection of Far-UVC KrCl Excilamp with 222nm Peak Wavelength","authors":"Guoshuai Dong, Fanny Zhao, Hao Wu, Guoming Yang, Ronghua Deng, Brian Shieh, S. W. R. Lee","doi":"10.1109/SSLChinaIFWS54608.2021.9675209","DOIUrl":"https://doi.org/10.1109/SSLChinaIFWS54608.2021.9675209","url":null,"abstract":"The KrCl Excimer lamps (Excilamps) with 222nm peak wavelength have been developed for 20 years, however, there are few researches found regarding on their life projection. To insure the enough radiation for the important inactivating effectiveness during the service life, this work focuses on irradiance maintenance of KrCl Excilamps at different tube wall temperatures. In general, the activation energy of the Arrhenius equation modelling the lifetime for electronic products suffering from temperature stress below 500K can be considered as temperature-independent. However, due to the unique configuration of KrCl Excilamps without the electrodes inside their tubes and the chemical reaction of Chlorine with the quartz tube wall, their degradation model might need to be verified. In our study, the irradiance of the KrCl Excilamps at tube temperatures around 80, 90 and 100°C for 1000 hours was investigated to find the associated rate coefficients using the exponential and the logarithmic least square curve-fitting. For the better accuracy of life projection, the power-law and the linear relations with temperature are assumed to obtain the temperature-dependent Arrhenius parameters: the pre-exponential factor and the activation energy of the Arrhenius Equation. It is found that the life projection based on the irradiance maintenance can be obtained with a better agreement by the temperature-dependent models using the logarithmic least square curve-fitting for the KrCl Excilamps with 222nm peak wavelength.","PeriodicalId":6816,"journal":{"name":"2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)","volume":"17 1","pages":"239-242"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78906314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aiming at the problems of poor illumination uniformity and the low effective light energy utilization on the target surface of traditional plant lighting source, it is difficult to meet the requirements of efficient production of high-quality crops in plant factories. In this paper, the layout of LED plant light source was optimized according to the characteristics of RGB LED, and to find a better optimization method of LED light layout. Firstly, we conduct the research based on the characteristics of RGB LED light source. Specifically, the LED array method is simulated and analyzed using an Optical Design Software TracePro (Lambda Research Corporation), and the influence of the LED layout distribution and the distance of the light source on the illuminance was explored. Secondly, the optimal array mode is obtained through Taguchi optimization method and ANOVA theoretical analysis. The results indicate that the optimal layout is that the distance of light source is 85mm, the first term of transverse symmetric arithmetic sequence is 61mm, the first term of longitudinal symmetric arithmetic sequence is 55mm. The illumination uniformity is 83. 987% and the color-mixed uniformity is 84. 54%. This design method provides a new idea for the design of high uniformity area light source.
针对传统植物光源目标表面照明均匀度差、有效光能利用率低的问题，难以满足植物工厂高效生产优质作物的要求。本文针对RGB LED的特点，对LED植物光源的布局进行了优化，找到了一种更好的LED光源布局优化方法。首先，我们根据RGB LED光源的特性进行了研究。具体而言，利用光学设计软件TracePro (Lambda Research Corporation)对LED阵列方法进行了仿真分析，探讨了LED布局分布和光源距离对照度的影响。其次，通过田口优化法和方差分析理论分析得到最优阵列模式。结果表明，最优布局为光源距离85mm，横向对称等差序列第一项为61mm，纵向对称等差序列第一项为55mm。照度均匀度为83。98.7%，混色均匀度84。54%。这种设计方法为高均匀度区域光源的设计提供了一种新的思路。
{"title":"Design method for improving illumination distribution uniformity of LED plant growth light source","authors":"Zezhou Zheng, Zhiyu Ma, Rui Li, Hongyu Wei, X. Chu, Hongli Liu","doi":"10.1109/SSLChinaIFWS54608.2021.9675191","DOIUrl":"https://doi.org/10.1109/SSLChinaIFWS54608.2021.9675191","url":null,"abstract":"Aiming at the problems of poor illumination uniformity and the low effective light energy utilization on the target surface of traditional plant lighting source, it is difficult to meet the requirements of efficient production of high-quality crops in plant factories. In this paper, the layout of LED plant light source was optimized according to the characteristics of RGB LED, and to find a better optimization method of LED light layout. Firstly, we conduct the research based on the characteristics of RGB LED light source. Specifically, the LED array method is simulated and analyzed using an Optical Design Software TracePro (Lambda Research Corporation), and the influence of the LED layout distribution and the distance of the light source on the illuminance was explored. Secondly, the optimal array mode is obtained through Taguchi optimization method and ANOVA theoretical analysis. The results indicate that the optimal layout is that the distance of light source is 85mm, the first term of transverse symmetric arithmetic sequence is 61mm, the first term of longitudinal symmetric arithmetic sequence is 55mm. The illumination uniformity is 83. 987% and the color-mixed uniformity is 84. 54%. This design method provides a new idea for the design of high uniformity area light source.","PeriodicalId":6816,"journal":{"name":"2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)","volume":"43 1","pages":"202-210"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76633751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-06DOI: 10.1109/SSLChinaIFWS54608.2021.9675241
Qingyuan Han
Nanohole light-emitting diodes (NHLED) is designed based on three-dimensional thermoelectric coupling simulation. By etching nanoholes through active layer, uniformity of current distribution is improved. Furthermore, an experimental NHLED sample is fabricated and tested. Experimental data and initial simulation result have good coincidence. This proves the validity of simulation model. By going deep to the simulation model, we find model with low-resistance transparent conductive layer (TCL) performs better uniformity. Then the effect of nonradiative-recombination heat is considered. When the input current is comparatively low, the effect of nonradiative-recombination heat is slight. In addition, effects on uniformity with different input current is discussed. When current density is comparatively low, NHLED performs 3-folds better uniformity than its counterpart without nanoholes. To further improve the uniformity of current distribution, the size of chip and period of nanoholes are discussed. To ensure NHLED performs impressive improvement on current uniformity, chips should be with big size, small period and used for comparatively low input current situation.
{"title":"Improved Uniformity of Current Distribution in Nanohole Light-Emitting Diode","authors":"Qingyuan Han","doi":"10.1109/SSLChinaIFWS54608.2021.9675241","DOIUrl":"https://doi.org/10.1109/SSLChinaIFWS54608.2021.9675241","url":null,"abstract":"Nanohole light-emitting diodes (NHLED) is designed based on three-dimensional thermoelectric coupling simulation. By etching nanoholes through active layer, uniformity of current distribution is improved. Furthermore, an experimental NHLED sample is fabricated and tested. Experimental data and initial simulation result have good coincidence. This proves the validity of simulation model. By going deep to the simulation model, we find model with low-resistance transparent conductive layer (TCL) performs better uniformity. Then the effect of nonradiative-recombination heat is considered. When the input current is comparatively low, the effect of nonradiative-recombination heat is slight. In addition, effects on uniformity with different input current is discussed. When current density is comparatively low, NHLED performs 3-folds better uniformity than its counterpart without nanoholes. To further improve the uniformity of current distribution, the size of chip and period of nanoholes are discussed. To ensure NHLED performs impressive improvement on current uniformity, chips should be with big size, small period and used for comparatively low input current situation.","PeriodicalId":6816,"journal":{"name":"2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)","volume":"2016 1","pages":"93-99"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86393732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-06DOI: 10.1109/SSLChinaIFWS54608.2021.9675221
F. Wu, Hongping Ma, Jie Zhang, Xinlan Hou, Yuanlan Zhang, Qingchun Zhang
This study explores the effect of implantation temperature on defect information at a total implantation dose of 1×1014 cm−2. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) were used to investigate defect formation of 4H-SiC in which a medium dose of aluminum ions had been implanted at different temperatures. In the XRD spectrum, a subtle difference was observed among samples, while the TEM images show that defect formation after post-implantation annealing was highly similar on the three samples. On the other hand, secondary ion mass spectroscopy (SIMS) indicates that the implanted temperature has no significant effect on the ions' concentration distribution. The study concludes that room temperature can be used instead of high temperature in the implantation process at such a medium dose.
{"title":"Temperature-Dependence of Aluminum Implanted 4H-SiC After High-Temperature Annealing","authors":"F. Wu, Hongping Ma, Jie Zhang, Xinlan Hou, Yuanlan Zhang, Qingchun Zhang","doi":"10.1109/SSLChinaIFWS54608.2021.9675221","DOIUrl":"https://doi.org/10.1109/SSLChinaIFWS54608.2021.9675221","url":null,"abstract":"This study explores the effect of implantation temperature on defect information at a total implantation dose of 1×1014 cm−2. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) were used to investigate defect formation of 4H-SiC in which a medium dose of aluminum ions had been implanted at different temperatures. In the XRD spectrum, a subtle difference was observed among samples, while the TEM images show that defect formation after post-implantation annealing was highly similar on the three samples. On the other hand, secondary ion mass spectroscopy (SIMS) indicates that the implanted temperature has no significant effect on the ions' concentration distribution. The study concludes that room temperature can be used instead of high temperature in the implantation process at such a medium dose.","PeriodicalId":6816,"journal":{"name":"2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)","volume":"7 1","pages":"71-73"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88181790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Light source is an important factor in digital camera-based spectral reconstruction since it influence the camera responses of the object. In this paper, we explored the influence of light sources on spectral reconstruction from several aspects. Firstly, we tested the influence of correlated color temperature (CCT) of simulated daylight sources on spectral reconstruction. Then, the influence of light sources with same CCT but different spectral power distribution (SPD) on the spectral reconstruction was explored. After that, the influence of light sources with special shape of SPDs on spectral reconstruction was tested. Results indicated that the CCT can be used to describe the performance of the daylight source in spectral reconstruction, but can not be used to describe the other non-daylight sources, the red component in visible spectrum is important for higher spectral reconstruction accuracy. Four feature metrics of SPDs are proposed to evaluate the performance of light sources in spectral reconstruction. Further tests showed that the higher the metrics score the better the spectral reconstruction accuracy.
{"title":"Exploring the Influence of Light Sources on Digital Camera-based Spectral Reflectance Reconstruction","authors":"Jinxing Liang, Anping Liu, Lei Xin, Weiyu Zheng, Qiang Zhu, X. Hu, Jia Chen","doi":"10.1109/SSLChinaIFWS54608.2021.9675203","DOIUrl":"https://doi.org/10.1109/SSLChinaIFWS54608.2021.9675203","url":null,"abstract":"Light source is an important factor in digital camera-based spectral reconstruction since it influence the camera responses of the object. In this paper, we explored the influence of light sources on spectral reconstruction from several aspects. Firstly, we tested the influence of correlated color temperature (CCT) of simulated daylight sources on spectral reconstruction. Then, the influence of light sources with same CCT but different spectral power distribution (SPD) on the spectral reconstruction was explored. After that, the influence of light sources with special shape of SPDs on spectral reconstruction was tested. Results indicated that the CCT can be used to describe the performance of the daylight source in spectral reconstruction, but can not be used to describe the other non-daylight sources, the red component in visible spectrum is important for higher spectral reconstruction accuracy. Four feature metrics of SPDs are proposed to evaluate the performance of light sources in spectral reconstruction. Further tests showed that the higher the metrics score the better the spectral reconstruction accuracy.","PeriodicalId":6816,"journal":{"name":"2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)","volume":"30 1","pages":"173-176"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84131548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-06DOI: 10.1109/SSLChinaIFWS54608.2021.9675177
Fei Wang, Xiaoxiao Ji, Luqiao Yin, A. Guo, Jianhua Zhang
Underwater lighting systems and imaging systems are mainly used in underwater pipeline internal inspection, underwater environment information collection, resource detection, etc. This article explores a panoramic lighting imaging system based on an underwater environment. Mainly from the intelligent lighting system, panoramic imaging system, and system integration optimization. The intelligent lighting system mainly explores a high-brightness intelligent lighting device with a high-brightness lighting system. The imaging system mainly works in conjunction with the lighting system. The imaging system mainly collects 250° panoramic picture information and 250° video information for scientific research and other tasks. Provide appropriate information and data. Finally, system integration optimization and joint work are carried out.
{"title":"Research on panoramic illumination imaging system based on SURF algorithm","authors":"Fei Wang, Xiaoxiao Ji, Luqiao Yin, A. Guo, Jianhua Zhang","doi":"10.1109/SSLChinaIFWS54608.2021.9675177","DOIUrl":"https://doi.org/10.1109/SSLChinaIFWS54608.2021.9675177","url":null,"abstract":"Underwater lighting systems and imaging systems are mainly used in underwater pipeline internal inspection, underwater environment information collection, resource detection, etc. This article explores a panoramic lighting imaging system based on an underwater environment. Mainly from the intelligent lighting system, panoramic imaging system, and system integration optimization. The intelligent lighting system mainly explores a high-brightness intelligent lighting device with a high-brightness lighting system. The imaging system mainly works in conjunction with the lighting system. The imaging system mainly collects 250° panoramic picture information and 250° video information for scientific research and other tasks. Provide appropriate information and data. Finally, system integration optimization and joint work are carried out.","PeriodicalId":6816,"journal":{"name":"2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)","volume":"40 1","pages":"114-117"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84849608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-06DOI: 10.1109/SSLChinaIFWS54608.2021.9675212
Tian Lixin, Yang Fei, Niu Xiping, An Yunlai, Zhang Wenting, Liu Rui, Duan Zechen, Wu Junmin
We have successfully developed 6500V SiC MOSFET on 6-inch wafer with the on-resistance of 160mΩ and specific on-resistance of 55mΩ.cm2. In this paper, simulation, fabrication and electrical characteristic are reported. At the same time, some body diode characteristics are revealed. Experiments and simulations show that when Vgs=0V the p-well surface doping concentration affects the body diode conduction characteristics. The conduction current mainly flows from the N+ source region to the N-drift region through the channel. The greater the p-well surface doping concentration, the greater the body diode turn-on voltage, and vice versa. When Vgs=-4, the current flows mainly from the P+ base region to the N-drift region and the conduction characteristics of the body diode are mainly affected by the P+ base region.
我们在6英寸晶圆上成功开发了6500V SiC MOSFET，导通电阻160mΩ，比导通电阻55mΩ.cm2。本文报道了该系统的仿真、制作和电学特性。同时，揭示了本体二极管的一些特性。实验和仿真结果表明，当Vgs=0V时，p阱表面掺杂浓度影响体二极管的导通特性。导通电流主要通过通道从N+源区流向N漂移区。p阱表面掺杂浓度越大，体二极管导通电压越大，反之亦然。当Vgs=-4时，电流主要从P+基极区流向n漂移区，体二极管的导通特性主要受P+基极区影响。
{"title":"Development and Analysis of 6500V SiC Power MOSFET","authors":"Tian Lixin, Yang Fei, Niu Xiping, An Yunlai, Zhang Wenting, Liu Rui, Duan Zechen, Wu Junmin","doi":"10.1109/SSLChinaIFWS54608.2021.9675212","DOIUrl":"https://doi.org/10.1109/SSLChinaIFWS54608.2021.9675212","url":null,"abstract":"We have successfully developed 6500V SiC MOSFET on 6-inch wafer with the on-resistance of 160mΩ and specific on-resistance of 55mΩ.cm2. In this paper, simulation, fabrication and electrical characteristic are reported. At the same time, some body diode characteristics are revealed. Experiments and simulations show that when Vgs=0V the p-well surface doping concentration affects the body diode conduction characteristics. The conduction current mainly flows from the N+ source region to the N-drift region through the channel. The greater the p-well surface doping concentration, the greater the body diode turn-on voltage, and vice versa. When Vgs=-4, the current flows mainly from the P+ base region to the N-drift region and the conduction characteristics of the body diode are mainly affected by the P+ base region.","PeriodicalId":6816,"journal":{"name":"2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)","volume":"29 1","pages":"6-9"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86699768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-06DOI: 10.1109/SSLChinaIFWS54608.2021.9675256
Zengyi Xu, Tianqu Chen, Guojin Qin, N. Chi
Visible light communication (VLC) is predicted to become an indispensable part of 6G network as it has a rich spectrum resource and other desired characteristics in communication such as high security and low electromagnetic interference. However, the direct modulation/demodulation in VLC introduces the non-linearity effect that limits the performance in communication. To tackle this problem, recent researches apply the emerging machine learning technique (ML) and neural network (NN) to enhance the system performance under high non-linearity. This article introduces four applications of machine learning in VLC system, and discusses their effectiveness.
{"title":"Applications of Machine Learning in Visible Light Communication","authors":"Zengyi Xu, Tianqu Chen, Guojin Qin, N. Chi","doi":"10.1109/SSLChinaIFWS54608.2021.9675256","DOIUrl":"https://doi.org/10.1109/SSLChinaIFWS54608.2021.9675256","url":null,"abstract":"Visible light communication (VLC) is predicted to become an indispensable part of 6G network as it has a rich spectrum resource and other desired characteristics in communication such as high security and low electromagnetic interference. However, the direct modulation/demodulation in VLC introduces the non-linearity effect that limits the performance in communication. To tackle this problem, recent researches apply the emerging machine learning technique (ML) and neural network (NN) to enhance the system performance under high non-linearity. This article introduces four applications of machine learning in VLC system, and discusses their effectiveness.","PeriodicalId":6816,"journal":{"name":"2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)","volume":"9 5 1","pages":"198-201"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90824018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-06DOI: 10.1109/SSLChinaIFWS54608.2021.9675159
Pengsen Lin, Xiaoxiao Ji, Luqiao Yin, Jianhua Zhang
We propose a simulation scheme for studying quantum dot (QD) light effects of full-color micro-light-emitting-diode (micro-LED) arrays. We have studied the influence of QD thickness and concentration on light efficiency. The results show that the QD concentration and thickness have an impact on the light efficiency. When the thickness of the QD is 5 µm, or the maximum light conversion efficiency can be obtained when the concentration is 0.1 mol/L. By analyzing the light field distribution of different QD thicknesses, the light crosstalk phenomenon is observed. This kind of crosstalk can cause blurry display images and should be avoided.
{"title":"Computational Analysis of Quantum Dots as Color Conversion Layer for Micro-LED Applications","authors":"Pengsen Lin, Xiaoxiao Ji, Luqiao Yin, Jianhua Zhang","doi":"10.1109/SSLChinaIFWS54608.2021.9675159","DOIUrl":"https://doi.org/10.1109/SSLChinaIFWS54608.2021.9675159","url":null,"abstract":"We propose a simulation scheme for studying quantum dot (QD) light effects of full-color micro-light-emitting-diode (micro-LED) arrays. We have studied the influence of QD thickness and concentration on light efficiency. The results show that the QD concentration and thickness have an impact on the light efficiency. When the thickness of the QD is 5 µm, or the maximum light conversion efficiency can be obtained when the concentration is 0.1 mol/L. By analyzing the light field distribution of different QD thicknesses, the light crosstalk phenomenon is observed. This kind of crosstalk can cause blurry display images and should be avoided.","PeriodicalId":6816,"journal":{"name":"2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)","volume":"127 2 1","pages":"154-157"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79581465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-06DOI: 10.1109/SSLChinaIFWS54608.2021.9675279
Henan Lyu, Shaohua Zhang, Tiangang Lyu, Yuefei Wang, Yanchun Yang
LED has been applied in the field of cannabis cultivation due to its high efficiency, energy saving and controllable spectrum. This article introduces the botanical characteristics of cannabis, the cannabinoids and the classification and application of cannabis. Through the analysis of relevant research at home and abroad, it focuses on the effects of photon flux density (PPFD), light quality, and photoperiod on the growth and development of cannabis and cannabinoid accumulation, then puts forward relevant suggestions and considerations. Finally, the design of LED artificial lighting system is discussed.
{"title":"Discussion on the Effect of LED Light on Cannabinoid Accumulation and the Design of Artificial Lighting System for Hemp (Cannabis Sativa L.) Cultivation","authors":"Henan Lyu, Shaohua Zhang, Tiangang Lyu, Yuefei Wang, Yanchun Yang","doi":"10.1109/SSLChinaIFWS54608.2021.9675279","DOIUrl":"https://doi.org/10.1109/SSLChinaIFWS54608.2021.9675279","url":null,"abstract":"LED has been applied in the field of cannabis cultivation due to its high efficiency, energy saving and controllable spectrum. This article introduces the botanical characteristics of cannabis, the cannabinoids and the classification and application of cannabis. Through the analysis of relevant research at home and abroad, it focuses on the effects of photon flux density (PPFD), light quality, and photoperiod on the growth and development of cannabis and cannabinoid accumulation, then puts forward relevant suggestions and considerations. Finally, the design of LED artificial lighting system is discussed.","PeriodicalId":6816,"journal":{"name":"2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)","volume":"43 1","pages":"216-227"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88341292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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