Organic Electronics最新文献_第7页

Enhanced thermoelectric performance of PEDOT:PSS film by two-step post-treatment with mixed solvent based ionic liquid 混合溶剂基离子液体两步后处理提高了PEDOT:PSS薄膜的热电性能

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-09-01 Epub Date: 2025-06-26 DOI: 10.1016/j.orgel.2025.107289

Zhao Nan , Yabo Xu , Jingshuang Ma , Yanfang Wang , Yaowei Han , Mengna Wang , Bo Zhao , Hua Wang

{"title":"Enhanced thermoelectric performance of PEDOT:PSS film by two-step post-treatment with mixed solvent based ionic liquid","authors":"Zhao Nan , Yabo Xu , Jingshuang Ma , Yanfang Wang , Yaowei Han , Mengna Wang , Bo Zhao , Hua Wang","doi":"10.1016/j.orgel.2025.107289","DOIUrl":"10.1016/j.orgel.2025.107289","url":null,"abstract":"<div><div>Thermoelectric (TE) materials and generators can convert thermal energy into electrical energy directly through temperature gradients to solve the pollution of waste heat and the energy crisis. Here, we adopted a two-step post-treatment of PEDOT:PSS films by sulfuric acid (H<sub>2</sub>SO<sub>4</sub>) and the new mixed solvent consisting of sodium borohydride (NaBH<sub>4</sub>) and 1-ethyl-3-methylimidazolyl dicyandiamide (EMIM-DCA). H<sub>2</sub>SO<sub>4</sub> and EMIM-DCA can enhance electrical conductivity by removing the insulating PSS and induce benzenoid-to-quinoid conformational transformation of the PEDOT chains. NaBH<sub>4</sub> as a reducing agent can reduce the dipolaritons of PEDOT to polaritons or neutral monomers, which can achieve an increase of the Seebeck coefficient. The second step post-treatment using mixed solvent of NaBH<sub>4</sub>+EMIM-DCA increased the Seebeck coefficient while maintaining a high level of electrical conductivity, generating the highest power factor of 95.1 μW/m·K<sup>2</sup> (electrical conductivity of 1214.3 S/cm and Seebeck coefficient of 28.0 μV/K) at room temperature, which was one of the best results with mixed solvent post-treatment up to now. Besides, a 6-legs TE generator was prepared and achieved with the highest output voltage of 5.77 mV and highest output power of 23.43 nW under the <em>ΔT</em> of 30 K, which represented great prospects for the application in self-powered wearable electronics.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"144 ","pages":"Article 107289"},"PeriodicalIF":2.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144501335","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

Correlation between charge-carrier distribution and local crystallinity in organic films 有机薄膜中载流子分布与局部结晶度的关系

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-09-01 Epub Date: 2025-07-05 DOI: 10.1016/j.orgel.2025.107295

Jiaqiang Zhu , Yubo Geng , Ying Han , Haoyuan Li

{"title":"Correlation between charge-carrier distribution and local crystallinity in organic films","authors":"Jiaqiang Zhu , Yubo Geng , Ying Han , Haoyuan Li","doi":"10.1016/j.orgel.2025.107295","DOIUrl":"10.1016/j.orgel.2025.107295","url":null,"abstract":"<div><div>Understanding charge transport in organic semiconductor films is essential for optimizing organic electronic devices. Organic films often exhibit complex morphologies, consisting of crystalline and amorphous phases, which significantly affect charge carrier distribution and transport. Moreover, film morphologies evolve under operational conditions, especially in flexible devices that are subjected to mechanical stress. Here, we investigated the relationship between charge-carrier distribution and film morphology in organic films based on device-level simulations. A Monte Carlo method for morphology generation and master equation simulations were employed to obtain steady-state charge-carrier densities. Our results showed a strong correlation between local charge density and local crystallinity near the injecting electrode in hole-only devices. However, this correlation diminishes between the electrodes and near the collecting electrode. Additionally, the strength of the correlation is dependent on the grain size, the observation length, the energy-level difference between phases, and the applied voltage; these phenomena revealed the detailed features of nonuniform charge-transport pathways in organic films. These findings provide insights into the relationship between film morphology and charge transport, informing the optimization of organic electronic devices, particularly flexible ones that operate under mechanical stress.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"144 ","pages":"Article 107295"},"PeriodicalIF":2.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572696","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}

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Host-guest energy level matching criteria for cyano-based host materials in phosphorescent and TADF OLEDs 磷光和TADF oled中氰基主体材料的主客体能级匹配标准

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-09-01 Epub Date: 2025-06-20 DOI: 10.1016/j.orgel.2025.107288

Wenbo Yuan , Shiying Hu , Yaotian Zhang , Jingsheng Wang , Yuying Wu , Wei Yao , Changsheng Shi , Ning Sun , Youtian Tao

{"title":"Host-guest energy level matching criteria for cyano-based host materials in phosphorescent and TADF OLEDs","authors":"Wenbo Yuan , Shiying Hu , Yaotian Zhang , Jingsheng Wang , Yuying Wu , Wei Yao , Changsheng Shi , Ning Sun , Youtian Tao","doi":"10.1016/j.orgel.2025.107288","DOIUrl":"10.1016/j.orgel.2025.107288","url":null,"abstract":"<div><div>The development of universal host materials with balanced bipolar transport properties and appropriate energy level alignment for diverse dopant emitters remains highly challenging for high-performance OLEDs. This study presents two bipolar host materials, 3CN-mCBP and 4CN-mCBP, by introducing cyano (CN) groups at the 3- or 4-positions of carbazole rings in the well-known hole-transport host mCBP (3,3′-di(9H-carbazol-9-yl)-1,1′-biphenyl). Compared to mCBP, the modified hosts exhibit comparable or slightly reduced triplet energy levels, along with deeper HOMO and LUMO energy levels. Charge transport characterization demonstrates enhanced electron injection/transport in the order of 4CN-mCBP > 3CN-mCBP ≫ mCBP, with hole transport capabilities following the reversed sequence: mCBP > 4CN-mCBP > 3CN-mCBP. In green phosphorescent OLEDs using (ppy)<sub>2</sub>Ir(acac), the CN-modified hosts achieve superior efficiencies (21.6 % and 19.9 % EQE) versus mCBP (11.8 %), while blue devices with FIrpic show opposite performance trends. For green TADF emitter 4tCzDOXD, all hosts yield comparable efficiencies (15.3–17.9 %). These results highlight the challenges in developing universal host materials for diverse emitter systems.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"144 ","pages":"Article 107288"},"PeriodicalIF":2.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144338706","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

Cu/Ag composite nanotrough embedded polyacrylonitrile film: Transparent conducting electrodes with excellent flexibility and a high quality factor Cu/Ag复合纳米槽嵌入聚丙烯腈薄膜：具有优异柔韧性和高品质因数的透明导电电极

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-09-01 Epub Date: 2025-05-25 DOI: 10.1016/j.orgel.2025.107277

Qinjun Sun , Jian Zhao , Hua Ding , Xiaoqian Wang , Qianwen Hu , LiYan Gao , Yuying Hao

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Machine learning assisted designing of phenothiazine and phenoxazine-based dyes. Database generation and property prediction 机器学习辅助设计吩噻嗪和吩恶嗪基染料。数据库生成和属性预测

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-09-01 Epub Date: 2025-07-04 DOI: 10.1016/j.orgel.2025.107291

Talal M. Althagafi , Fatimah Mohammed A. Alzahrani , M.S. Al-Buriahi , Asif Mahmood

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Flexible piezoelectric sensor based on PVDF/ZnO/MWCNT composites for human motion monitoring 基于PVDF/ZnO/MWCNT复合材料的柔性压电传感器用于人体运动监测

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-09-01 Epub Date: 2025-07-01 DOI: 10.1016/j.orgel.2025.107290

Chuanming Sun, Huifang Liu, Jiaqi Wang, Guangkun Shan, Teng Ren

{"title":"Flexible piezoelectric sensor based on PVDF/ZnO/MWCNT composites for human motion monitoring","authors":"Chuanming Sun, Huifang Liu, Jiaqi Wang, Guangkun Shan, Teng Ren","doi":"10.1016/j.orgel.2025.107290","DOIUrl":"10.1016/j.orgel.2025.107290","url":null,"abstract":"<div><div>Flexible piezoelectric sensors hold great promise for human motion monitoring; however, achieving high sensitivity, rapid response, and excellent stability remains a significant challenge. In this study, a novel poly (vinylidene fluoride) (PVDF)/zinc oxide (ZnO)/multi-walled carbon nanotube (MWCNT) piezoelectric composite film was fabricated using near-field electrohydrodynamic direct-writing (NFEDW) technology. By optimizing the material composition, the PVDF/ZnO/0.5 wt% MWCNT composite exhibited outstanding piezoelectric performance, with a high sensitivity of 560 mV/N and a fast response time of 5.57 ms, enabling the rapid and accurate detection of external mechanical stimuli. The sensor demonstrated excellent signal stability during a 6000-s cyclic vibration test, confirming its long-term reliability. Furthermore, the sensor can precisely capture subtle physiological signals, showcasing its significant potential for human motion monitoring applications. This study provides a new strategy for designing high-performance flexible piezoelectric sensors and advances their practical applications in intelligent sensing systems.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"144 ","pages":"Article 107290"},"PeriodicalIF":2.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144556932","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

Extraction method of trap states dynamics parameters for organic photodetectors based on transient laser response 基于瞬态激光响应的有机光电探测器阱态动力学参数提取方法

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-09-01 Epub Date: 2025-05-16 DOI: 10.1016/j.orgel.2025.107275

Sai Liu, Jiajie Liu, Ruipeng Chen, Miao Xu, Lei Wang, Weijing Wu, Junbiao Peng

引用次数: 0

Blue phosphorescent organic light-emitting diodes with extended operational lifetime through hole transport layer management 通过空穴传输层管理延长使用寿命的蓝色磷光有机发光二极管

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-09-01 Epub Date: 2025-05-08 DOI: 10.1016/j.orgel.2025.107263

KangMun Lee , Jong-Kwan Bin

{"title":"Blue phosphorescent organic light-emitting diodes with extended operational lifetime through hole transport layer management","authors":"KangMun Lee , Jong-Kwan Bin","doi":"10.1016/j.orgel.2025.107263","DOIUrl":"10.1016/j.orgel.2025.107263","url":null,"abstract":"<div><div>Achieving higher efficiency and a longer operational lifetime is equally important yet remains a daunting task in the domain of blue phosphorescent organic light-emitting diodes (PhOLEDs). Optimizing an appropriate hole transport layer (HTL) has proven to be a potential approach for improving the performance of blue PhOLED. In the present work, we investigated a spiro-bifluorene-based <strong>SFAF</strong> HTL to develop blue PhOLEDs with high efficiency and extended operational lifetime. The spiro-bifluorene unit imparts enhanced thermal stability to the <strong>SFAF</strong> molecular structure. Further, careful management of the thickness of <strong>SFAF</strong> HTL fosters a charge balance in the emitting layer and subsequently strengthens the performance of the fabricated devices. The fabricated devices emit in the blue region, achieving an EQE<sub>max</sub> nearing 20 %, and demonstrated excellent resistance to efficiency roll-off at higher luminance. Interestingly, the operational lifetime up to 95 % of the initial luminance (LT<sub>95</sub>) of the <strong>SFAF</strong> devices measured at 1000 cd/m<sup>2</sup> brightness was more than double compared to that of the reference device fabricated using <strong>BCFN</strong> as HTL, which has a structure similar to the <strong>SFAF</strong> without the spiro group. The study suggests that the spiro-bifluorene-based HTLs can be excellent candidates for developing blue phosphorescent OLEDs with higher efficiency and longer operational lifetime.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"144 ","pages":"Article 107263"},"PeriodicalIF":2.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946622","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}

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Electrochromic supercapacitor electrodes based on viologen-derived cross-linked thin films 基于紫堇衍生交联薄膜的电致变色超级电容器电极

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-09-01 Epub Date: 2025-05-14 DOI: 10.1016/j.orgel.2025.107273

Sude Uluçay , Neul Gyum Ha , Arzu Kortun , Sinem Altınışık , Selin Pıravadılı , Jin Han Kwon , Hong Chul Moon , Sermet Koyuncu

{"title":"Electrochromic supercapacitor electrodes based on viologen-derived cross-linked thin films","authors":"Sude Uluçay , Neul Gyum Ha , Arzu Kortun , Sinem Altınışık , Selin Pıravadılı , Jin Han Kwon , Hong Chul Moon , Sermet Koyuncu","doi":"10.1016/j.orgel.2025.107273","DOIUrl":"10.1016/j.orgel.2025.107273","url":null,"abstract":"<div><div>Viologens are an important class of materials in organic electrochromic technology due to their n-type semiconductor properties and the high color intensity in their radical cation state. Due to their charged structures, viologens are generally ideal molecules for gel-based organic electrochromic devices, but with specific modifications, they can also be employed in thin-film-based electrochromic devices (ECDs). In this study, crosslinking reactions of viologen-based molecules (ALV-X) with various allyl group-containing counterions were conducted on ITO/Glass surfaces in the presence of a tetra-thiol-based crosslinker. The surface roughness of the resulting films varied from 4.64 nm to 8.46 nm depending on the counterion exchange. Electrochemical characterizations of the prepared viologen-based crosslinked electrodes indicated that the LUMO energy levels ranged between −4.267 eV and −4.297 eV. Viologen-based cross-linked thin films with transmittance changes close to 30 % in the visible region, 50 % in the UV region and 20 % in the NIR region with specific capacitances of 0.25 mF cm<sup>−2</sup> have been found to be highly suitable materials, especially as cathodic layers in electrochromic/supercapacitor devices.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"144 ","pages":"Article 107273"},"PeriodicalIF":2.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072527","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}

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Low-cost fabrication of organic rectifying diodes for high-speed AC/DC conversion 用于高速AC/DC转换的有机整流二极管的低成本制造

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-09-01 Epub Date: 2025-06-03 DOI: 10.1016/j.orgel.2025.107284

Norio Onojima, Ryousei Matsumoto, Kanta Hatano, Naoki Koremura

引用次数: 0