Organic Electronics最新文献_第2页

Novel integrated reference-counter electrode for electrochemical measurements of HOMO and LUMO levels in small-molecule thin-film semiconductors for OLEDs 用于 OLED 小分子薄膜半导体中 HOMO 和 LUMO 电平电化学测量的新型集成参比对电极

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-10-28 DOI: 10.1016/j.orgel.2024.107152

Sevki C. Cevher, Kurt P. Pernstich

{"title":"Novel integrated reference-counter electrode for electrochemical measurements of HOMO and LUMO levels in small-molecule thin-film semiconductors for OLEDs","authors":"Sevki C. Cevher, Kurt P. Pernstich","doi":"10.1016/j.orgel.2024.107152","DOIUrl":"10.1016/j.orgel.2024.107152","url":null,"abstract":"<div><div>Organic light-emitting diodes (OLEDs) are a prominent display technology, yet the accurate characterization of the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) levels in their constituent materials remains challenging. This study introduces a novel integrated reference-counter electrode (IRCE) assembly, leveraging a gel polymer electrolyte with an embedded silver quasi-reference electrode, facilitating the electrochemical measurement of HOMO and LUMO levels in small molecular thin-film semiconductors. Calibration of the IRCE against ferrocene enables the establishment of an absolute energy scale. Comparative stability tests against a standard Ag/AgNO<sub>3</sub> reference electrode confirm the IRCE's reliability. Electrochemical characterization using cyclic voltammetry was performed on prototypical OLED materials, including NPB, TCTA, PO-T2T neat films, and an NPB:PO-T2T exciplex film. While NPB and PO-T2T exhibited stable voltammograms, TCTA showed signs of electropolymerization. Additionally, the HOMO level of the NPB:PO-T2T exciplex was slightly shifted compared to that of NPB, suggesting interactions within the exciplex. The results demonstrated the IRCE's capability to accurately determine frontier energy levels in thin films, paving the way for better device modeling and a better understanding of underlying electronic processes in organic semiconductors.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"136 ","pages":"Article 107152"},"PeriodicalIF":2.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spin effect in the ferromagnetic organic photovoltaics cells 铁磁性有机光伏电池中的自旋效应

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-10-19 DOI: 10.1016/j.orgel.2024.107151

Bin Tong , Yuee Xie , Yuanping Chen , Zhongxuan Wang

引用次数: 0

Blue-emission crystalline OLED doped with DMAC-DPS TADF material 掺杂了 DMAC-DPS TADF 材料的蓝色发光晶体 OLED

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-10-18 DOI: 10.1016/j.orgel.2024.107150

Wantao Zheng , Feng Zhu , Donghang Yan

{"title":"Blue-emission crystalline OLED doped with DMAC-DPS TADF material","authors":"Wantao Zheng , Feng Zhu , Donghang Yan","doi":"10.1016/j.orgel.2024.107150","DOIUrl":"10.1016/j.orgel.2024.107150","url":null,"abstract":"<div><div>Doping thermally activated delayed fluorescence (TADF) materials with high exciton utilization into crystalline hosts with high carrier mobility is an effective approach for developing novel OLEDs. This approach harnesses the strengths of both materials to realize high-performance blue light-emitting crystalline organic light-emitting diodes (C-OLEDs). Nevertheless, the high triplet energy levels of blue emitting TADF materials may facilitate the outflow of triplet excitons through Dexter energy transfer to the lower energy levels within the crystalline host, thus leading to efficiency losses in the device. In this study, we present a pioneering strategy designed to improve the exciton utilization efficiency of TADF materials in C-OLED by leveraging the up-conversion capability of TTA materials to reclaim triplet excitons. With a well-designed energy level structure, this device achieves a maximum EQE of 5.6 % and a low turn-on voltage of 2.7 V. The benefits of the crystalline host allowed for fast turn-on, and a rapid increase in brightness and current density, leading to significantly improved blue photon output and a lower series resistance Joule heat loss ratio. This work introduces a novel approach to employ TADF materials in crystalline hosts and manage excitons within the emissive layer of devices, aiming to develop high-performance C-OLEDs.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"135 ","pages":"Article 107150"},"PeriodicalIF":2.7,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A strategy for achieving high-performance single layer polymer photodetectors through dark current reduction using PMMA additives 利用 PMMA 添加剂降低暗电流实现高性能单层聚合物光电探测器的策略

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-10-18 DOI: 10.1016/j.orgel.2024.107149

Guozhen Bai , Luwen Ran , Xinmu Chen, Zilong Wang, Zhidong Lou, Yanbing Hou, Feng Teng, Yufeng Hu

{"title":"A strategy for achieving high-performance single layer polymer photodetectors through dark current reduction using PMMA additives","authors":"Guozhen Bai , Luwen Ran , Xinmu Chen, Zilong Wang, Zhidong Lou, Yanbing Hou, Feng Teng, Yufeng Hu","doi":"10.1016/j.orgel.2024.107149","DOIUrl":"10.1016/j.orgel.2024.107149","url":null,"abstract":"<div><div>Suppressing dark current density is crucial for optimizing the performance of organic photodetectors (PDs), particularly in terms of detectivity (D∗) and linear dynamic range (LDR). Organic PDs often utilize the bulk heterojunction structure of organic solar cells to significantly increase photocurrent. However, unlike solar cells, which are unaffected by dark current, photodetectors' performance is substantially limited by it. The interconnected network of bulk heterojunctions leads to a noticeable increase in dark current, thus degrading device performance. Typically, reducing dark current involves adding a modification layer or using multilayer planar heterojunctions, which effectively reduce dark current but often delay response speed and complicate manufacturing. This study presents an alternative approach by incorporating a small concentration of PMMA into single-layer polymer photodetectors, significantly reducing dark current without affecting photocurrent. For this single-layer polymer PD, an ultra-low dark current density of 1.25 × 10<sup>−8</sup> A/cm<sup>2</sup>, a high D<sub>sh</sub>∗ of 2.74 × 10<sup>12</sup> Jones, an LDR of 120.5 dB, and a fast response time with 1.6 μs were achieved. The capacitance-voltage (C-V), electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), and atomic force microscopy (AFM) measurements revealed that the PMMA additive reduces internal defects, increases bulk resistance, optimizes phase separation, and enhances carrier transport efficiency. The improved device performances are attributed to a more efficient vertical arrangement of the donor-acceptor interface and carrier channels, thus reducing carrier recombination loss. These findings offer a new direction for fabricating high-performance single-layer photodetectors.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"136 ","pages":"Article 107149"},"PeriodicalIF":2.7,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation into characteristics of blue iridium (III) pyrimidine complexes with suppressed shoulder peak emission 研究具有抑制肩峰发射的蓝色铱 (III) 嘧啶配合物的特性

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-10-13 DOI: 10.1016/j.orgel.2024.107148

Mingxu Du , Bo Ju , Qi Zhou

引用次数: 0

Thienothiophene and benzothiadiazole based conjugated donor-acceptor polymers; synthesis, photophysical properties and organic field effect transistor applications 基于噻吩和苯并噻二唑的共轭供体-受体聚合物；合成、光物理性质和有机场效应晶体管应用

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-10-06 DOI: 10.1016/j.orgel.2024.107147

Bibi Amna , Recep Isci , Sheida Faraji , Humaira M. Siddiqi , Turan Ozturk

{"title":"Thienothiophene and benzothiadiazole based conjugated donor-acceptor polymers; synthesis, photophysical properties and organic field effect transistor applications","authors":"Bibi Amna , Recep Isci , Sheida Faraji , Humaira M. Siddiqi , Turan Ozturk","doi":"10.1016/j.orgel.2024.107147","DOIUrl":"10.1016/j.orgel.2024.107147","url":null,"abstract":"<div><div>Novel conjugated donor-acceptor (D-A) type polymers (<strong>P1-P3</strong>) possessing thieno[3,2-<em>b</em>]thiophenes (TT) as donors having different functional groups and 2,1,3-benzothiadiazole (BT) as an acceptor were designed and synthesized <em>via</em> palladium-catalyzed Sonogashira coupling reaction. Their electronic and optical properties were investigated by UV–Vis and fluorescence spectroscopies and cylic voltammetry analysis. Organic field-effect transistor (OFET) of the polymers were fabricated using biodegradable and environmental-friendly khaya gum as a high dielectric layer to investigate their charge transport characteristics were at low voltage. All the polymers displayed a p-type field-effect behaviour, among which alkyl chain (C<sub>9</sub>H<sub>19</sub>) substituted <strong>P2</strong> exhibited the highest average saturated hole mobility, μ<sub>sat</sub>, 0.086 cm<sup>2</sup> V<sup>−1</sup> s<sup>−1</sup>, on/off current ratio, I<sub>on</sub>/I<sub>off</sub> = 1.0 × 10<sup>3</sup>, and subthreshold swing, SS, 425 mV dec<sup>−1</sup>. The results presented in this work corroborate that the three novel TT-BT polymers have promising potential for electronic and optoelectronic applications, in particular, where tunability of the field-effect behaviour is essential for performance.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"135 ","pages":"Article 107147"},"PeriodicalIF":2.7,"publicationDate":"2024-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advancing stability in inverted polymer solar cells through accelerated xenon curing of the ZnO layer 通过加速氙气固化氧化锌层提高倒置聚合物太阳能电池的稳定性

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-10-01 DOI: 10.1016/j.orgel.2024.107146

Chih-Chien Lee , Pei-Chun Ku , Kasimayan Uma , Hui-Chieh Lin , Ssu-Yung Chung , Shun-Wei Liu

{"title":"Advancing stability in inverted polymer solar cells through accelerated xenon curing of the ZnO layer","authors":"Chih-Chien Lee , Pei-Chun Ku , Kasimayan Uma , Hui-Chieh Lin , Ssu-Yung Chung , Shun-Wei Liu","doi":"10.1016/j.orgel.2024.107146","DOIUrl":"10.1016/j.orgel.2024.107146","url":null,"abstract":"<div><div>This study delves into the profound implications of employing an intensive xenon lamp treatment with a rapid curing method completed within 4 min, to fabricate a ZnO layer. Subsequently, we applied a coating of PM6:Y6 as the active layer and utilized MoO<sub>3</sub>/Ag as the contact electrode, aiming to advance the efficiency of polymer solar cells (PSCs) through entirely room-temperature processes. Our investigation juxtaposes this xenon lamp treatment with the conventional hot plate method for annealing the ZnO layer, conducted at 180 °C for both 20 min and 4 min. Remarkably, our proposed xenon lamp treatment process not only promotes charge transfer but also exhibits enhancements of the lattice oxygen in the Zn-O layer. This innovative methodology of xenon treatment yields a notable increase in power conversion efficiency (PCE), achieving 14.55 %, compared to 13.71 % and 12.44 % for the ZnO layers annealed with a hot plate for 20 min and 4 min, respectively. Moreover, devices subjected to the 4-min xenon lamp treatment maintained 85 % (T<sub>85</sub>) of their original Power Conversion Efficiency (PCE) after enduring 500 h of one-sun aging measurement. These findings evoke optimism regarding the xenon treatment's potential to streamline the fabrication process, and provide a promising avenue for mitigating interface degradation while enhancing the stability of PSCs.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"135 ","pages":"Article 107146"},"PeriodicalIF":2.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stretchable electronics: Advances in elastic conductive fibers for multifunctional applications 可拉伸电子器件：用于多功能应用的弹性导电纤维的研究进展

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-09-18 DOI: 10.1016/j.orgel.2024.107145

Aliakbar Jafari

{"title":"Stretchable electronics: Advances in elastic conductive fibers for multifunctional applications","authors":"Aliakbar Jafari","doi":"10.1016/j.orgel.2024.107145","DOIUrl":"10.1016/j.orgel.2024.107145","url":null,"abstract":"<div><div>This review paper provides an extensive overview of elastic conductive fibers (ECFs), highlighting their evolution, design, and applications in stretchable electronics. ECFs are versatile due to their superior mechanical properties, lightweight nature, and ease of integration, making them ideal for wearable technology, health monitoring, aerospace, and bioengineering. The paper examines how ECFs combine fiber flexibility with electronic functionality, maintaining conductivity under mechanical deformation, and explores their use in wearable electronics, soft robotics, bioelectronics, and flexible energy devices. Key challenges discussed include balancing conductivity and stretchability, with a focus on innovative materials and structural designs to enhance performance and durability. ECFs are categorized by structural design (intrinsically stretchable and non-stretchable) and conductive materials (inorganic and organic), detailing advancements in micro/nano-structured conductive fillers and specialized microstructures. Applications in electrodes, strain sensors, transmitters, and actuators are showcased. The review also addresses manufacturing challenges, advocating for cost-effective, high-performance materials, scalable production methods, and a multidisciplinary approach combining empirical research, computational models, and machine learning. The future of ECFs lies in large-scale production with consistent quality, multifunctional integration, and leveraging AI-driven models for design and manufacturing. As research advances, ECFs are set to become fundamental in modern electronic applications, emphasizing the need for continued exploration and innovation.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"135 ","pages":"Article 107145"},"PeriodicalIF":2.7,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Proton-gated organic thin-film transistors for leaky integrate-and-fire convolutional spiking neural networks 质子门控有机薄膜晶体管用于漏电集火卷积尖峰神经网络

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-09-16 DOI: 10.1016/j.orgel.2024.107144

Xiang Wan , Shengnan Cui , Changqing Li , Jie Yan , Fuguo Tian , Haoyang Luo , Zhongzhong Luo , Li Zhu , Zhihao Yu , Dongyoon Khim , Liuyang Sun , Yong Xu , Huabin Sun

{"title":"Proton-gated organic thin-film transistors for leaky integrate-and-fire convolutional spiking neural networks","authors":"Xiang Wan , Shengnan Cui , Changqing Li , Jie Yan , Fuguo Tian , Haoyang Luo , Zhongzhong Luo , Li Zhu , Zhihao Yu , Dongyoon Khim , Liuyang Sun , Yong Xu , Huabin Sun","doi":"10.1016/j.orgel.2024.107144","DOIUrl":"10.1016/j.orgel.2024.107144","url":null,"abstract":"<div><p>Artificial spiking neurons, integral to the functionality of spiking neural networks, are designed to mimic the information transmission via discrete spikes in biological nervous systems. Traditional approaches that necessitate the charging of capacitors and the inclusion of discharge circuits for neuron membrane potential integration and leakage, present challenges in terms of cost and space efficiency. To overcome the challenges, this work proposes a hardware leaky integrate-and-fire neuron based on organic thin-film transistors. Under the electric field, the ion dynamics in the gate electrolyte can mimic the processes of membrane potential integration, leakage, and reset in spiking neurons. The convolutional spiking neural networks composed of such organic spiking neurons achieves excellent recognition rates (∼97.26 %) on the MNIST dataset. This indicates that the organic spiking neuron has enormous potential in next-generation non-von Neumann neuromorphic computing.</p></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"135 ","pages":"Article 107144"},"PeriodicalIF":2.7,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142272056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly efficient green and blue emitters exhibiting thermally activated delayed fluorescence with 4,6-substituted dibenzo[b,d]thiophene-S,S-dioxide as electron acceptor and their electroluminescent properties 以 4,6-取代二苯并[b,d]噻吩-S,S-二氧化物为电子受体，显示热激活延迟荧光的高效绿色和蓝色发光体及其电致发光特性

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-09-14 DOI: 10.1016/j.orgel.2024.107140

Bochen Li , Ruiqin Zhu , Hongyan Wang , Daokun Zhong , Zhao Feng , Xiaolong Yang , Yuanhui Sun , Guijiang Zhou , Bo Jiao

{"title":"Highly efficient green and blue emitters exhibiting thermally activated delayed fluorescence with 4,6-substituted dibenzo[b,d]thiophene-S,S-dioxide as electron acceptor and their electroluminescent properties","authors":"Bochen Li , Ruiqin Zhu , Hongyan Wang , Daokun Zhong , Zhao Feng , Xiaolong Yang , Yuanhui Sun , Guijiang Zhou , Bo Jiao","doi":"10.1016/j.orgel.2024.107140","DOIUrl":"10.1016/j.orgel.2024.107140","url":null,"abstract":"<div><p>Through attaching electron donors to the 4, 6-positions of dibenzo[<em>b</em>,<em>d</em>]thiophene-<em>S</em>,<em>S</em>-dioxide (DBTDO), three organic emitters (<strong>SO-OZ</strong>, <strong>SO-AD</strong> and <strong>SO-CZ</strong>) with D-A-D configuration have been designed and synthesized. They not only show high thermal stability with decomposition temperature (T<sub>d</sub>) higher than 460 °C, but also exhibit photoluminescent quantum yield (PLQY) as high as 0.9. Despite that <strong>SO-CZ</strong> with carbazole unit as electron donor cannot furnish thermally activated delayed fluorescence (TADF) emission, both <strong>SO-OZ</strong> with 10<em>H</em>-phenoxazine as electron donor and <strong>SO-AD</strong> bearing electron donor of 9,9-dimethylacridine exhibit typical TADF behaviors due to their small energy difference between S<sub>1</sub> and T<sub>1</sub> excited states (Δ<em>E</em><sub>ST</sub>). Critically, <strong>SO-OZ</strong> can show very fast revers intersystem crossing (RISC) process with rate constant of RISC (k<sub>RISC</sub>) <em>ca.</em> 1.8 × 10<sup>6</sup> s<sup>−1</sup>. The cyclic voltammetry (CV) results indicate their decent electrochemical stability by showing reversible oxidation and reduction processes. When doped into the emission layer of organic light-emitting diodes (OLEDs), they can show good potential as highly efficient emitters, showing electroluminescent efficiencies of the maximum current efficiency (CE) of 53.4 cd A<sup>−1</sup>, the maximum power efficiency (PE) of 52.4 lm W<sup>−1</sup> and the maximum external quantum efficiency (EQE) of 20.5 %. These encouraging results can provide critical information for developing highly efficient TADF emitters based on DBTDO electron acceptor.</p></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"135 ","pages":"Article 107140"},"PeriodicalIF":2.7,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142242369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0