Pub Date : 2019-07-02DOI: 10.23919/AM-FPD.2019.8830560
Yan-De Li, Purushotham Thatiboyana, S. Biring, C. Lee, Shun‐Wei Liu
We introduce a high-efficiency small-molecule organic photovoltaic (OPV) device which can emit different color with different thickness of the organic layer. In this OPV device, we can change the color output by simply tuning the thickness organic layer which forms microcavity cathode between layers of silver. Our OPV exhibited a highest power conversion efficiency of 5.48%, with an open circuit voltage of 0.89 V, and short-circuit current density of 9.17 mA/cm2. Fill factor (FF) was calculated as 67.2 % under 1 sun solar illumination (AM 1.5G).
{"title":"A Colorful Organic Photovoltaic Devices with a 5.48 % Power Conversion Efficiency","authors":"Yan-De Li, Purushotham Thatiboyana, S. Biring, C. Lee, Shun‐Wei Liu","doi":"10.23919/AM-FPD.2019.8830560","DOIUrl":"https://doi.org/10.23919/AM-FPD.2019.8830560","url":null,"abstract":"We introduce a high-efficiency small-molecule organic photovoltaic (OPV) device which can emit different color with different thickness of the organic layer. In this OPV device, we can change the color output by simply tuning the thickness organic layer which forms microcavity cathode between layers of silver. Our OPV exhibited a highest power conversion efficiency of 5.48%, with an open circuit voltage of 0.89 V, and short-circuit current density of 9.17 mA/cm2. Fill factor (FF) was calculated as 67.2 % under 1 sun solar illumination (AM 1.5G).","PeriodicalId":129222,"journal":{"name":"2019 26th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129285579","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 : 2019-07-02DOI: 10.23919/am-fpd.2019.8830549
Jongsuk Bae
Over last 20 years, the evolution of display has been occurred rapidly to change our life style. Nowadays we could get any information at any time and any place through various forms of displays such as smart phones, pads, laptops and TV sets. It would be interesting to see the displays are changing forms to fit into our life style and meet our interests or convenience. Transparent, rollable and foldable displays would be the typical example of the transition. To meet the speed of transition, many new technologies have been applied and no one would deny the OLED has been leading the change of display technology and contributing to the change of life style. Furthermore, the fact that the OLED could control its properties of light emitted from each pixel of display would be another change of display to the new application for healthcare. In this talk, I’d like to mainly touch the OLED technology, its merits and development direction
{"title":"OLED, Change Your Lifestyle: Its Technologies","authors":"Jongsuk Bae","doi":"10.23919/am-fpd.2019.8830549","DOIUrl":"https://doi.org/10.23919/am-fpd.2019.8830549","url":null,"abstract":"Over last 20 years, the evolution of display has been occurred rapidly to change our life style. Nowadays we could get any information at any time and any place through various forms of displays such as smart phones, pads, laptops and TV sets. It would be interesting to see the displays are changing forms to fit into our life style and meet our interests or convenience. Transparent, rollable and foldable displays would be the typical example of the transition. To meet the speed of transition, many new technologies have been applied and no one would deny the OLED has been leading the change of display technology and contributing to the change of life style. Furthermore, the fact that the OLED could control its properties of light emitted from each pixel of display would be another change of display to the new application for healthcare. In this talk, I’d like to mainly touch the OLED technology, its merits and development direction","PeriodicalId":129222,"journal":{"name":"2019 26th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126887698","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 : 2019-07-02DOI: 10.23919/AM-FPD.2019.8830579
Po-Cheng Lai, M. Cheng, Li-Wei Shih, Chih-Lung Lin
This work proposes a simplified pixel circuit that involves only four low-temperature polycrystalline silicon (LTPS) thin-film transistors (TFTs) and two capacitors especially for high-resolution active matrix organic light-emitting diode (AMOLED) displays. The proposed circuit adopts the simultaneous emission driving method to extend the compensating time for precisely sensing the threshold voltage variation of driving TFTs. Moreover, the flicker phenomenon is ameliorated by adjusting the voltage level of ELVSS during the programming period. Simulation results show that the relative current error rates under various data voltages with VTH variation of driving TFT of ± 0.5 V are all less than 4.5%, demonstrating that the proposed pixel circuit can generate uniform driving currents flowing through OLEDs for high-quality images.
{"title":"Simplified Compensation Pixel Circuit Based on LTPS TFTs for High-Quality images of High-Resolution AMOLED Displays","authors":"Po-Cheng Lai, M. Cheng, Li-Wei Shih, Chih-Lung Lin","doi":"10.23919/AM-FPD.2019.8830579","DOIUrl":"https://doi.org/10.23919/AM-FPD.2019.8830579","url":null,"abstract":"This work proposes a simplified pixel circuit that involves only four low-temperature polycrystalline silicon (LTPS) thin-film transistors (TFTs) and two capacitors especially for high-resolution active matrix organic light-emitting diode (AMOLED) displays. The proposed circuit adopts the simultaneous emission driving method to extend the compensating time for precisely sensing the threshold voltage variation of driving TFTs. Moreover, the flicker phenomenon is ameliorated by adjusting the voltage level of ELVSS during the programming period. Simulation results show that the relative current error rates under various data voltages with VTH variation of driving TFT of ± 0.5 V are all less than 4.5%, demonstrating that the proposed pixel circuit can generate uniform driving currents flowing through OLEDs for high-quality images.","PeriodicalId":129222,"journal":{"name":"2019 26th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127118835","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 : 2019-07-02DOI: 10.23919/AM-FPD.2019.8830593
D. Chowdhury, S. Garner, Sue C. Lewis
Organic Light Emitting Diodes (OLEDs) for lighting are quickly becoming the new lighting source for residential, commercial, and automotive markets. Backlights are the first automotive application for OLED lighting. Thin, light weight, uniform and homogeneous surface lighting with high contrast segmentation are the key values that some OEMs are capitalizing on. With Corning® Willow® Glass, conformable OLED lighting panels enable unique design and a new branding paradigm for automotive OEMs.
{"title":"Application of OLED for Automotive Lighting","authors":"D. Chowdhury, S. Garner, Sue C. Lewis","doi":"10.23919/AM-FPD.2019.8830593","DOIUrl":"https://doi.org/10.23919/AM-FPD.2019.8830593","url":null,"abstract":"Organic Light Emitting Diodes (OLEDs) for lighting are quickly becoming the new lighting source for residential, commercial, and automotive markets. Backlights are the first automotive application for OLED lighting. Thin, light weight, uniform and homogeneous surface lighting with high contrast segmentation are the key values that some OEMs are capitalizing on. With Corning® Willow® Glass, conformable OLED lighting panels enable unique design and a new branding paradigm for automotive OEMs.","PeriodicalId":129222,"journal":{"name":"2019 26th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116569616","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 : 2019-07-02DOI: 10.23919/AM-FPD.2019.8830632
Shih-Hung Lin, Yan-Chih Lu, C.C. Tai, Cheng Tzu-Huan
CIGS solar cells has high opportunity to achieve high efficiency. The analysis of efficiency loss plays an important role for efficiency boost. The recombination loss often occurs at junction, bulk, surface, and edge position and leads to solar cell efficiency loss. Electroluminescence from defect-related optical transition is applied for defect analysis in CIGS solar cells. The micro-QE measurement is used for edge recombination analysis and reveals the recombination behavior of CIGS solar cells. EQE response at short wavelength region represents the quality of shallow region along light incident direction and used in the edge recombination study as well as EL intensity distribution.
{"title":"Identification of Edge Recombination from CIGS Solar Cells","authors":"Shih-Hung Lin, Yan-Chih Lu, C.C. Tai, Cheng Tzu-Huan","doi":"10.23919/AM-FPD.2019.8830632","DOIUrl":"https://doi.org/10.23919/AM-FPD.2019.8830632","url":null,"abstract":"CIGS solar cells has high opportunity to achieve high efficiency. The analysis of efficiency loss plays an important role for efficiency boost. The recombination loss often occurs at junction, bulk, surface, and edge position and leads to solar cell efficiency loss. Electroluminescence from defect-related optical transition is applied for defect analysis in CIGS solar cells. The micro-QE measurement is used for edge recombination analysis and reveals the recombination behavior of CIGS solar cells. EQE response at short wavelength region represents the quality of shallow region along light incident direction and used in the edge recombination study as well as EL intensity distribution.","PeriodicalId":129222,"journal":{"name":"2019 26th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116661101","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 : 2019-07-02DOI: 10.23919/AM-FPD.2019.8830586
C. Lin, Shu-mei Yang, W. Kuo, Kai-ling Liang, Yen-Hsiang Fang, Chih-I Wu
The development of thin film micro LEDs has led the display industry into a new era. The highly-efficient and color-saturated pixels provided by the semiconductor chips can be the foundation of the new type of micro-display or large signage. Meanwhile various issues in micro-assembly need to optimize to obtain satisfactory process flow and throughput yield for this technology. Both RGB method and color-conversion method are promising for micro-LED based displays and their progress in ITRI lab will be fully reviewed in this study.
{"title":"The Advanced Thin Film Micro LED Array","authors":"C. Lin, Shu-mei Yang, W. Kuo, Kai-ling Liang, Yen-Hsiang Fang, Chih-I Wu","doi":"10.23919/AM-FPD.2019.8830586","DOIUrl":"https://doi.org/10.23919/AM-FPD.2019.8830586","url":null,"abstract":"The development of thin film micro LEDs has led the display industry into a new era. The highly-efficient and color-saturated pixels provided by the semiconductor chips can be the foundation of the new type of micro-display or large signage. Meanwhile various issues in micro-assembly need to optimize to obtain satisfactory process flow and throughput yield for this technology. Both RGB method and color-conversion method are promising for micro-LED based displays and their progress in ITRI lab will be fully reviewed in this study.","PeriodicalId":129222,"journal":{"name":"2019 26th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116039746","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 : 2019-07-02DOI: 10.23919/AM-FPD.2019.8830630
Sheng-Kuang Peng, Po-Hsiang Fang, P. Kuo, Horng-Long Cheng, F. Tang, W. Chou
Organic thin-film transistor (OTFT) devices with polyimide (PI) layers of various solid contents were fabricated. In OTFT devices, the factor of interface between modification and active layers exhibits profound correlation with electrical stability of devices. To improve the performance of stability of OTFTs during long-term operation, effective interface engineering needs to be utilized. Herein, this study demonstrated the relevance about interface properties and microstructures of N,N′-ditridecyl-3,4,9,10-perylene tetracarboxylic diimide (PTCDI-C13H27) grown the PI layers of various solid content. Moreover, the microstructure of PTCDI-C13H27 affects the trap state in the channel, leading to the enhancement of electrical stability of the devices. Consequently, we further adopted an appropriate solid content of PI with smooth surface and lower trap state to fabricate low voltage-driven organic devices.
{"title":"Modulation of interfacial properties for low voltage-driven organic thin-film transistors","authors":"Sheng-Kuang Peng, Po-Hsiang Fang, P. Kuo, Horng-Long Cheng, F. Tang, W. Chou","doi":"10.23919/AM-FPD.2019.8830630","DOIUrl":"https://doi.org/10.23919/AM-FPD.2019.8830630","url":null,"abstract":"Organic thin-film transistor (OTFT) devices with polyimide (PI) layers of various solid contents were fabricated. In OTFT devices, the factor of interface between modification and active layers exhibits profound correlation with electrical stability of devices. To improve the performance of stability of OTFTs during long-term operation, effective interface engineering needs to be utilized. Herein, this study demonstrated the relevance about interface properties and microstructures of N,N′-ditridecyl-3,4,9,10-perylene tetracarboxylic diimide (PTCDI-C13H27) grown the PI layers of various solid content. Moreover, the microstructure of PTCDI-C13H27 affects the trap state in the channel, leading to the enhancement of electrical stability of the devices. Consequently, we further adopted an appropriate solid content of PI with smooth surface and lower trap state to fabricate low voltage-driven organic devices.","PeriodicalId":129222,"journal":{"name":"2019 26th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121722782","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 : 2019-07-02DOI: 10.23919/am-fpd.2019.8830582
You Xiang Stacy Wu
Displays have become a key HMI element in automotive interior design. The article is meant to give an overview of market size changes, specification development trends, technology roadmaps, and suppliers’ competition analysis.
{"title":"Automotive Display Market Outlook","authors":"You Xiang Stacy Wu","doi":"10.23919/am-fpd.2019.8830582","DOIUrl":"https://doi.org/10.23919/am-fpd.2019.8830582","url":null,"abstract":"Displays have become a key HMI element in automotive interior design. The article is meant to give an overview of market size changes, specification development trends, technology roadmaps, and suppliers’ competition analysis.","PeriodicalId":129222,"journal":{"name":"2019 26th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122349776","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 : 2019-07-02DOI: 10.23919/AM-FPD.2019.8830621
T. Yokota, T. Someya
We have developed ultra-flexible and lightweight organic electronics and photonics devices with few micron substrates. We fabricated the 2-V operational organic transistor and circuits which has very thin gate dielectric layers. And also we fabricated highly efficient, ultra-flexible, air-stable, three-color, polymer light-emitting diodes (PLEDs) have been manufactured on one-micrometer-thick parylene substrates. Due to the very thin substrate and neutral position, our device shows the highly flexibility and conformability. The device doesn’t be broken after crumpling. Using this novel characteristic, we succeed to detect the bio information such as pulse wave and blood oxygen ratio.
{"title":"Electronic skin for healthcare monitoring","authors":"T. Yokota, T. Someya","doi":"10.23919/AM-FPD.2019.8830621","DOIUrl":"https://doi.org/10.23919/AM-FPD.2019.8830621","url":null,"abstract":"We have developed ultra-flexible and lightweight organic electronics and photonics devices with few micron substrates. We fabricated the 2-V operational organic transistor and circuits which has very thin gate dielectric layers. And also we fabricated highly efficient, ultra-flexible, air-stable, three-color, polymer light-emitting diodes (PLEDs) have been manufactured on one-micrometer-thick parylene substrates. Due to the very thin substrate and neutral position, our device shows the highly flexibility and conformability. The device doesn’t be broken after crumpling. Using this novel characteristic, we succeed to detect the bio information such as pulse wave and blood oxygen ratio.","PeriodicalId":129222,"journal":{"name":"2019 26th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122560878","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 : 2019-07-02DOI: 10.23919/AM-FPD.2019.8830558
Kumar Mallem, Sehyeon Kim, Sanchari Chowdary, Seyoun Kim, Jinsu Park, Jamein Kim, S. Dutta, M. Ju, Youngkuk Kim, Y. Cho, E. Cho, J. Yi
Ultra-thin MoOx is capable of exhibiting high work function (< 6 eV), large band gaps (< 3 eV) are benefiting for surface passivation and hole selectivity layer in silicon solar cells instead of the doped layers due to high parasitic absorption. Importantly, MoOx electronic structure by oxygen dilution during the evaporation have influence to the MoOx work function and hence reduce hole injection. XPS study confirmed the electronic structure and chemical composition of the evaporated and annealed (Ar and O2 atmosphere) MoOx sample. TEM showed a clear interface contact between the ITO/MoOx/a-SiH(i) layers and no diffusion between the layers after annealed at 140 °C. Fabricated 10 nm thick MoOx/n-Si solar cells archived an efficiency of 20.04%, FF of 73.79 % and Jsc of 38.40 mA/cm2. A sever degradation in FF and Jsc was noticed by increasing the MoOx thickness due to diffusion of layers and high parasitic absorption of MoOx.
{"title":"Influence of molybdenum oxide thickness, electronic structure, and work function on the performance of hole selective silicon heterojunction solar cells","authors":"Kumar Mallem, Sehyeon Kim, Sanchari Chowdary, Seyoun Kim, Jinsu Park, Jamein Kim, S. Dutta, M. Ju, Youngkuk Kim, Y. Cho, E. Cho, J. Yi","doi":"10.23919/AM-FPD.2019.8830558","DOIUrl":"https://doi.org/10.23919/AM-FPD.2019.8830558","url":null,"abstract":"Ultra-thin MoO<inf>x</inf> is capable of exhibiting high work function (< 6 eV), large band gaps (< 3 eV) are benefiting for surface passivation and hole selectivity layer in silicon solar cells instead of the doped layers due to high parasitic absorption. Importantly, MoO<inf>x</inf> electronic structure by oxygen dilution during the evaporation have influence to the MoO<inf>x</inf> work function and hence reduce hole injection. XPS study confirmed the electronic structure and chemical composition of the evaporated and annealed (Ar and O<inf>2</inf> atmosphere) MoO<inf>x</inf> sample. TEM showed a clear interface contact between the ITO/MoOx/a-SiH(i) layers and no diffusion between the layers after annealed at 140 °C. Fabricated 10 nm thick MoO<inf>x</inf>/n-Si solar cells archived an efficiency of 20.04%, FF of 73.79 % and J<inf>sc</inf> of 38.40 mA/cm<sup>2</sup>. A sever degradation in FF and J<inf>sc</inf> was noticed by increasing the MoO<inf>x</inf> thickness due to diffusion of layers and high parasitic absorption of MoO<inf>x</inf>.","PeriodicalId":129222,"journal":{"name":"2019 26th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131215268","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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