Organic Photonics + Electronics最新文献_第9页

A scalable digital microfluidic platform for automation of onsite testing of dairy samples 一个可扩展的数字微流控平台，用于乳品样品的现场自动化测试

Organic Photonics + Electronics Pub Date : 2021-08-01 DOI: 10.1117/12.2594613

R. Eswar, C. Brodie, C. Collier

{"title":"A scalable digital microfluidic platform for automation of onsite testing of dairy samples","authors":"R. Eswar, C. Brodie, C. Collier","doi":"10.1117/12.2594613","DOIUrl":"https://doi.org/10.1117/12.2594613","url":null,"abstract":"Antibiotic residues are regulated in commercially produced milk, with elevated concentrations being harmful. Detection of these antibiotic residues in milk pose a significant challenge for supply chain stakeholders due to the industry standard practice of low-interval off-site laboratory testing. This practice poses risk of non-compliant milk going undetected during on-site milk collection. On-site microfluidic technologies with integrated optical sensors are positioned to mitigate this challenge using increased screening intervals. Droplet-based (digital) microfluidic systems show promise to provide highthroughput screening in dairy applications with integrated fluorescence spectroscopy technologies. However, conventional digital microfluidic systems are subject to biofouling from the protein and fat content within milk. In this work, a biofouling-resistant digital microfluidic platform is introduced. The digital microfluidic platform leverages advancements in parafilm layers, and is demonstrated with actuation of milk and water microdroplets. Electrowetting-based microdroplet actuation is achieved via scalable grid arrays of uniplanar printed surface electrodes in open and closed system configurations. For this array technology, a reconfigurable firmware is developed for user control of automated microdroplet actuation at up to three hundred volts using a graphical computer interface. An exposition of the microdroplet actuation performance is demonstrated and assessed through an optical system for closed-open feedback and positioning of microdroplets. This optical closed-loop allows the actuation velocity of microdroplets to be characterized for polydimethylsiloxane and parafilm dielectric layers, for both water and milk as a function of frequency and voltage. Scalability and automation of the microfluidic platform is discussed, and future integration of fluorescence spectroscopy is investigated.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"134 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114059238","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}

引用次数: 1

Lessons learned from the first outdoor test of perovskite/silicon tandem solar cells 钙钛矿/硅串联太阳能电池第一次室外试验的经验教训

Organic Photonics + Electronics Pub Date : 2021-08-01 DOI: 10.1117/12.2595032

Erkan Aydin, Thomas G. Allen, M. De Bastiani, Lujia Xu, Esma Ugur, A. Ahmed, M. Salvador, E. van Kerschaver, S. De Wolf

引用次数: 0

Improvement in the stability of phosphorescent OLED with solution-coated hole-transport layer via exciplex–triplet energy transfer 利用双三重态能量转移提高溶液包覆空穴传输层磷光OLED的稳定性

Organic Photonics + Electronics Pub Date : 2021-08-01 DOI: 10.1117/12.2597360

F. Samaeifar, H. Aziz

{"title":"Improvement in the stability of phosphorescent OLED with solution-coated hole-transport layer via exciplex–triplet energy transfer","authors":"F. Samaeifar, H. Aziz","doi":"10.1117/12.2597360","DOIUrl":"https://doi.org/10.1117/12.2597360","url":null,"abstract":"An approach to enhance the lifetime of a phosphorescent organic light-emitting diode (PHOLED) with a solutionprocessed hole-transport layer (HTL) by employing energy transfer from an exciplex to a phosphorescent emitter is presented. Using the structure of solution-coated Poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(4,4′-(N-(4-secbutylphenyl) diphenylamine)] (TFB) as a HTL and vacuum-deposited 4,4′-Bis(carbazol-9-yl)biphenyl (CBP) as a host provides a suitable situation for the formation of exciplex between CBP and TFB because energy gap between the LUMO level of CBP and the HOMO level of TFB becomes much smaller than the HOMO-LUMO gap of CBP or TFB. As the PHOLED emission is solely from the phosphorescence, the intermediate exciplex state rapidly transfers its energy to the dopant triplet. Since singlet-excited state of exciplex requires much lower energy than singlet-excited state of the host, driving voltage for PHOLEDs using exciplex–triplet energy transfer (ExTET) is lower than conventional, leading to longer device lifetime. The results show that the electroluminescence half-life (LT50) of fabricated device with the structure of HTL TFB and host CBP in which exciplex can form between CBP and TFB is about 5785 h (for an initial luminance of 1000 cd m−2). On the other hand, in the other fabricated devices with the same structure and just mixing TFB with other materials with deeper HOMO level, where the ability to form exciplex between TFB and CBP is suppressed, the device lifetime is significantly shorter. To the best of our knowledge, it is the first time that ExTET is obtained in a hybrid structure involving solution-coated and vacuum-deposited layers.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126896249","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}

引用次数: 0

Solution-processable organic photodiodes with high detectivity and thermal stability designed for visible or near-infrared CMOS image sensors 具有高探测性和热稳定性的溶液可处理有机光电二极管，专为可见光或近红外CMOS图像传感器设计

Organic Photonics + Electronics Pub Date : 2021-08-01 DOI: 10.1117/12.2593410

Hidneori Nakayama, Kazuhiro Nakabayashi, R. Hata, Kazuhiro Mouri, Shigeru Nakane, Izuru Takei

{"title":"Solution-processable organic photodiodes with high detectivity and thermal stability designed for visible or near-infrared CMOS image sensors","authors":"Hidneori Nakayama, Kazuhiro Nakabayashi, R. Hata, Kazuhiro Mouri, Shigeru Nakane, Izuru Takei","doi":"10.1117/12.2593410","DOIUrl":"https://doi.org/10.1117/12.2593410","url":null,"abstract":"We report materials and device designs of solution-processable organic photodiodes (OPDs) for visible or near-infrared (NIR) light detection compatible with CMOS image sensors (CIS), a large market for photodiodes. OPDs for CIS need to be reliably processable on silicon wafers with conventional methods such as spin coating, to have extremely low dark current even at a couple of negative voltages to utilize high gain read-out circuits, and to be stable under 150–250°C heating to endure module packaging. Those requirements have not been taken into an account for organic photovoltaics (OPVs) development, which assumed large area printing at low processing temperature (<150°C). We selected a conventional structure (p-i-n) with a polymeric hole transport layer (HTL) which we originally made for organic light-emitting diodes (OLEDs). The HTL is free from acids and dopants, contributing to excellent device stability. For visible OPDs, we applied a donor/acceptor blend originally made for OPVs, and obtained an external quantum yield (EQE) of ~85% at 450–700 nm with a dark current of ~10−7 mA/cm2. For NIR OPDs targeting 940 nm, we newly developed NIR absorbing non-fullerene acceptors (NFAs) having a sharp absorption peak at the wavelength to realize high EQE (~80%) and low thermal carriers at dark (~10−5 mA/cm2). Both type of OPDs retained 70–100% of their original EQEs after thermal annealing at <150°C for two hours. In the presentation video, we will show NIR images obtained from the imaging arrays.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"11809 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130001674","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}

引用次数: 1

The potential benefits of polyethylenimine as an electron extraction layer for facilitating the manufacturing of inverted organic solar cells 聚乙烯亚胺作为电子萃取层的潜在效益，促进了倒置有机太阳能电池的制造

Organic Photonics + Electronics Pub Date : 2021-08-01 DOI: 10.1117/12.2597312

Mozhgan Sadeghianlemraski, H. Aziz

{"title":"The potential benefits of polyethylenimine as an electron extraction layer for facilitating the manufacturing of inverted organic solar cells","authors":"Mozhgan Sadeghianlemraski, H. Aziz","doi":"10.1117/12.2597312","DOIUrl":"https://doi.org/10.1117/12.2597312","url":null,"abstract":"The solvent-robustness and temporal stability of polyethylenimine (PEI) as an electron extraction layer (EEL) in inverted organic solar cells (OSCs) were studied. For that purpose, a PEI EEL is utilized in inverted OSCs with the archetypal Poly (3-hexylthiophene) (P3HT): [6,6]-Phenyl C61 butyric acid methyl ester (PC60BM) donor:acceptor system. Results show that soaking the PEI film in solvents (1-propanol and/or toluene) does not significantly impact OSC performance or photostability. As verified by X-ray photoelectron spectroscopy (XPS) measurements, the N atoms in PEI interact with indium-tin-oxide (ITO), causing PEI to strongly adhere to the surface of ITO so that potential processing solvents do not dissolve it. Shifts in N bands in the case of PEI on ITO compared to the PEI on glass confirm the presence of a strong physical interaction. In addition, comparing OSCs with fresh PEI and N2-stored PEI demonstrates that the PEI film is very stable over time, and a time gap between PEI deposition and subsequent fabrication processes does not affect OSC performance and photostability. We highlight that the utilization of PEI as a stable and robust EEL facilitates bridging between laboratory discoveries of OSCs with their practical demonstration and gives us considerable latitude in tackling the stringent requirements of OSC manufacturing.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130085116","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}

引用次数: 0

Phase stabilization for high-performance perovskite light-emitting diodes 高性能钙钛矿发光二极管的相位稳定

Organic Photonics + Electronics Pub Date : 2021-08-01 DOI: 10.1117/12.2595197

B. Guo, Shiyu Xing, Yaxin Wang, Runchen Lai, Baodan Zhao, D. Di

{"title":"Phase stabilization for high-performance perovskite light-emitting diodes","authors":"B. Guo, Shiyu Xing, Yaxin Wang, Runchen Lai, Baodan Zhao, D. Di","doi":"10.1117/12.2595197","DOIUrl":"https://doi.org/10.1117/12.2595197","url":null,"abstract":"Perovskite light-emitting diodes (PeLEDs) have shown great potential for next-generation display and solid-state lighting applications. In the related field of perovskite solar cells, preventing the conversion of the photovoltaically active black phase (α-phase) into the less desirable yellow phase (δ-phase) is of critical importance for achieving efficient and stable solar cells based on formamidinium lead iodide (FAPbI3) perovskite. Similar issues related to phase stability are expected to occur in PeLEDs, leading to reduced operational stability and the formation of additional electronic traps. In this work, we introduce an additive, sulfobetaine 10 (SFB-10), into the FAPbI3 perovskite for α-phase stabilization. The SFB-10 incorporated perovskite films show enhanced crystallinity, reduced defect density and improved α-phase stability, leading to high-performance PeLEDs with external quantum efficiencies exceeding 16%, and T90 (the time for radiance to decrease to 90% of its initial value) of over 1000 s at 200 mA cm-2 in air, offering a comparable performance to some of the most stable PeLEDs reported to date. This work may contribute to the development of stable perovskite light-emitting diodes.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125159984","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}

引用次数: 0

Accelerated design and optimization of novel OLED materials via active learning 基于主动学习的新型OLED材料加速设计与优化

Organic Photonics + Electronics Pub Date : 2021-08-01 DOI: 10.1117/12.2598140

H. Abroshan, Anand Chandrasekaran, P. Winget, Yuling An, Shaun H. Kwak, C. Brown, M. Halls

{"title":"Accelerated design and optimization of novel OLED materials via active learning","authors":"H. Abroshan, Anand Chandrasekaran, P. Winget, Yuling An, Shaun H. Kwak, C. Brown, M. Halls","doi":"10.1117/12.2598140","DOIUrl":"https://doi.org/10.1117/12.2598140","url":null,"abstract":"To date, the development of organic light-emitting diode (OLED) materials has been primarily based on a combination of chemical intuition and trial-and-error experimentation. The approach is often expensive and time-consuming, let alone in most instances fails to offer new materials leading to higher efficiencies. Data-driven approaches have emerged as a powerful tool to accelerate the design and discovery of novel materials with multifunctional properties for next generation OLED technologies. Virtual high-throughput methods assisted by machine learning (ML) enable a broad screening of chemical space to predict material properties and suggest new candidates for OLEDs. In order to build reliable predictive ML models for OLED materials, it is required to create and manage a high volume of data which not only maintain high accuracy but also properly assess the complexity of materials chemistry in the OLED space. Active learning (AL) is among several strategies developed to face the challenge in both materials science and life science applications, where the data management in large-scale becomes a main bottleneck. Here, we present a workflow that efficiently combines AL with atomic-scale simulations to reliably predict optoelectronic properties of OLED materials. This study provides a robust and validated framework to account for multiple parameters that simultaneously influence OLED performance. Results of this work pave the way for a fundamental understanding of optoelectronic performance of emergent layers from a molecular perspective, and further screen candidate materials with superior efficiencies before laborious simulations, synthesis, and device fabrication.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"11808 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130716575","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}

引用次数: 3

Numerical modeling of optical modes in nematic droplets 向列液滴光学模式的数值模拟

Organic Photonics + Electronics Pub Date : 2020-09-01 DOI: 10.1117/12.2569382

Urban Mur, M. Ravnik

引用次数: 0

Study the effect of fullerene derivatives ratio on P3HT-based inverted organic solar cells 研究富勒烯衍生物配比对p3ht基倒置有机太阳能电池性能的影响

Organic Photonics + Electronics Pub Date : 2020-08-25 DOI: 10.1117/12.2568790

Ikram Anefnaf, S. Aazou, G. Schmerber, A. Dinia, Z. Sekkat

{"title":"Study the effect of fullerene derivatives ratio on P3HT-based inverted organic solar cells","authors":"Ikram Anefnaf, S. Aazou, G. Schmerber, A. Dinia, Z. Sekkat","doi":"10.1117/12.2568790","DOIUrl":"https://doi.org/10.1117/12.2568790","url":null,"abstract":"The inverted organic solar cell devices (iOSCs) were fabricated with different weight ratios 1:0.6, 1:0.8, and 1:1 of P3HT and PCBM, respectively. The photo-physical properties of these devices with varying weight ratios are investigated. We find that the absorption spectra revealed a decrease in the intensities with increasing the fullerene ratio and the peaks were blue shifted. Thin films morphology is evaluated by atomic force microscopy (AFM). The PL quenching suggests that the transfer of photo-induced electrons from P3HT to PCBM increases hugely with an increase in the amount of PCBM. Raman spectroscopy for devices shows a strong reduction in the crystallinity by increasing the ratio of fullerene within the blend. The J-V measurements for all devices were performed under the illumination of simulated AM 1.5 sunlight at 100 mW/cm2. External quantum efficiency (EQE) and Internal quantum efficiency (IQE) measurements are also performed for the best device. The best performance was recorded for the device with 1:1 weight ratio of P3HT and PCBM give Power Conversion Efficiency (PCE) of 3.67%, in contrast to 3.36% for (1:0.8) and 2.51% for 1:0.6 devices.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132137657","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}

引用次数: 1

Integrated carbon nanotubes for novel liquid crystal displays 新型液晶显示器的集成碳纳米管

Organic Photonics + Electronics Pub Date : 2020-08-24 DOI: 10.1117/12.2569361

Md. Asiqur Rahman, T. Truong, J. H. Park, Hakam Agha, D. Suh, G. Scalia

引用次数: 1