Organic Electronics最新文献_第3页

Highly-efficient TADF OLEDs for photodynamic detection of ovarian and skin tumors 用于卵巢和皮肤肿瘤光动力学检测的高效TADF oled

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-07-17 DOI: 10.1016/j.orgel.2025.107303

Rajesh Kumar Tiwari , Sanjay Kumar Sharma , Rajesh Mishra , Mangey Ram Nagar

{"title":"Highly-efficient TADF OLEDs for photodynamic detection of ovarian and skin tumors","authors":"Rajesh Kumar Tiwari , Sanjay Kumar Sharma , Rajesh Mishra , Mangey Ram Nagar","doi":"10.1016/j.orgel.2025.107303","DOIUrl":"10.1016/j.orgel.2025.107303","url":null,"abstract":"<div><div>The early detection of ovarian and skin tumors remains a significant challenge due to the limitations of current imaging techniques in sensitivity, specificity, and accessibility. Photodynamic detection (PDD), employing photosensitizers activated by light to identify malignant tissues, offers a promising non-invasive solution. In this study, we present a novel approach that integrates highly-efficient organic light-emitting diodes (OLEDs) as compact, tunable light sources for photodynamic tumor detection. Unlike conventional systems that rely on inorganic LEDs, OLEDs offer advantages such as mechanical flexibility, wavelength specificity, low operating voltage, and facile integration into wearable or endoscopic devices. Simulation results indicated that the device with emitter doped in host materials shows 28 % higher recombination rate and 31 % higher current density as compared with neat emitter-based OLED. Following these simulations, the solution-processed devices were fabricated using the optimized architecture. The fabricated TADF OLEDs were characterized for their optical and electrical properties, revealing a high external quantum efficiency of 9.0 %, brightness of 6192 cd/m<sup>2</sup>, and power efficiency of 26.7 lm/W, which depicts accurate and precise biomarkers for the detection of non-invasive cancers. This study further demonstrated the potential role of these TADF OLEDs in cancer detection, specifically for identifying ovarian and skin cancer biomarkers, was revealed. A healthy person can be distinguished from an ovarian cancer patient based on the shifter fluorescence produced by their urine and from a skin cancer patient based on the fluorescence transmitted through the skin. These results demonstrate that doped carbazole-based TADF OLED displays higher performance, making them a promising candidate for biomedical applications.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"145 ","pages":"Article 107303"},"PeriodicalIF":2.7,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703520","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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Hydroxylamine additive enabled interface trap reduction for enhanced fullerene-based n-type organic transistors 羟胺添加剂使增强富勒烯基n型有机晶体管的界面陷阱减少

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-07-11 DOI: 10.1016/j.orgel.2025.107302

Benjamin Nketia-Yawson, Jea Woong Jo

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One-step Co-fabrication of tripod self-organized hole transport and perovskite layers for perovskite solar cells 钙钛矿太阳能电池三脚架自组织空穴输运与钙钛矿层的一步共制

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-07-09 DOI: 10.1016/j.orgel.2025.107296

Daiki Tomita, Ryo Ishikawa

{"title":"One-step Co-fabrication of tripod self-organized hole transport and perovskite layers for perovskite solar cells","authors":"Daiki Tomita, Ryo Ishikawa","doi":"10.1016/j.orgel.2025.107296","DOIUrl":"10.1016/j.orgel.2025.107296","url":null,"abstract":"<div><div>The use of self-assembled materials (SAM) in the hole transport layer (HTL) of inverted (p-i-n) perovskite solar cells (PSCs) has been a subject of growing interest. This is mainly due to their ability to achieve high HTL coverage with minimal film thickness, even on rough substrates, and to reduce the perovskite interface energy barrier. However, a common issue is a reduction in perovskite layer coverage on SAM. A novel one-step simultaneous co-formation of the p-i layer has been proposed to address this, involving the addition of SAM to the perovskite precursor solution.</div><div>This investigation explores the morphology and the physical properties of perovskite thin films produced using the one-step formation of the p-i layer without antisolvent, with the recently developed multipodal molecule[[5H-diindolo[3,2-a:3′,2′-c]carbazole-5,10,15-triyl]tris(propane-3,1-diyl)] trisphosphonic acid(3PATAT-C3), which exhibits a face-on molecular orientation. Results demonstrated that introducing 3PATAT-C3 into the perovskite precursor solution yielded improvements in passivation and promoted charge extraction.</div><div>The PSCs utilizing the one-step p-i co-deposition exhibited a remarkable power conversion efficiency (PCE) of 21.4 % and a fill factor of 78.7 %. These results outperformed the reference devices fabricated by depositing perovskite on SAM. Furthermore, statistical analyses indicate that hysteresis in current density–voltage curves has been reduced. These outcomes suggest that the one-step p-i co-deposition technique matches and potentially surpasses the performance of traditionally manufactured cells. Moreover, it achieves this with fewer fabrication steps, thereby representing a substantial advancement toward its commercial viability, instilling hope for the future of solar cell technology.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"145 ","pages":"Article 107296"},"PeriodicalIF":2.7,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632985","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 : 2025-07-05 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":"2025-07-05","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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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 : 2025-07-04 DOI: 10.1016/j.orgel.2025.107291

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

引用次数: 0

Blue-emitting OLED with a broad spectral profile for phototherapy light source of neonatal jaundice 具有广谱线的蓝光发光有机发光二极管，用于新生儿黄疸的光疗光源

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-07-04 DOI: 10.1016/j.orgel.2025.107292

Hao-Che Kao , Jia-Fan Wu , Jhao-Cheng Lu , Kuan-Hsun Wang , Kuan-Wei Chen , Chia-Chen Chung , Chung-Chih Wu , Chih-Hao Chang

{"title":"Blue-emitting OLED with a broad spectral profile for phototherapy light source of neonatal jaundice","authors":"Hao-Che Kao , Jia-Fan Wu , Jhao-Cheng Lu , Kuan-Hsun Wang , Kuan-Wei Chen , Chia-Chen Chung , Chung-Chih Wu , Chih-Hao Chang","doi":"10.1016/j.orgel.2025.107292","DOIUrl":"10.1016/j.orgel.2025.107292","url":null,"abstract":"<div><div>Neonatal jaundice, caused by bilirubin accumulation due to liver immaturity, requires blue light phototherapy for effective treatment. Conventional LED-based systems are limited by their narrow spectral width, potential thermal hazards, and the requirement to separate infants from caregivers. By integrating pure-blue fluorescent (BCzVBi) and sky-blue phosphorescent (FIrpic) emitters into a tandem organic light-emitting diode (OLED) structure, we developed blue OLEDs with a broad emission spectrum (430–530 nm) that better aligns with the bilirubin absorption band. The devices achieve a sufficient spectral power density (10–30 μW/cm<sup>2</sup>/nm) while maintaining surface temperatures well below 42 °C, making them well-suited for wearable applications. Emission profiles and doping concentrations were optimized to broaden the EL spectra. Thermal tests confirmed stable and safe operation under driving voltages of 13–14 V. The developed tandem OLEDs, featuring both a broad spectrum and high efficiency, represent a promising alternative to conventional LEDs for safer and more effective phototherapy of neonatal jaundice.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"145 ","pages":"Article 107292"},"PeriodicalIF":2.7,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144588200","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

Multifunctional organic synaptic transistors for tissue-equivalent dosimetry 用于组织等效剂量测定的多功能有机突触晶体管

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-07-03 DOI: 10.1016/j.orgel.2025.107293

Somnath Bhattacharjee , Naresh Jingar , Shree Prakash Tiwari

{"title":"Multifunctional organic synaptic transistors for tissue-equivalent dosimetry","authors":"Somnath Bhattacharjee , Naresh Jingar , Shree Prakash Tiwari","doi":"10.1016/j.orgel.2025.107293","DOIUrl":"10.1016/j.orgel.2025.107293","url":null,"abstract":"<div><div>Pervading the modern electronics landscape, organic synaptic transistors (OSTs) have emerged as a forefront device candidate for advancement in artificial intelligence (AI) systems. This paper reports OSTs as highly sensitive dosimeters which also emulate human tissue properties and cognitive functions. Fabricated OSTs exhibit excellent p-channel transistor characteristics with field-effect mobility of 0.21 (±0.03) cm<sup>2</sup>V<sup>−1</sup>s<sup>−1</sup> and on-off current ratio on the order of 10<sup>3</sup> for −10 V operation. The OSTs demonstrate short-term plasticity (STP) through behaviors such as pulse paired facilitation (PPF) and spike number dependent plasticity (SNDP). Notably, the relaxation time constants derived from PPF behavior, combined with an energy consumption per stimuli of ∼10 pJ, closely mimic those observed in human synapses. Moreover, by integrating the synaptic weights derived from the fabricated devices, artificial neural network (ANN) achieves a handwritten digit recognition accuracy exceeding 99.4 %. These OSTs exhibit negligible changes in on current and mobility after being irradiated, but a linearly varying shift in threshold voltage, suitable for detecting γ-radiation exposure. An impressive sensitivity (∼5 mV/rad) to γ-radiation exposure under radiation amount similar to the values used for treatment of tumors. Our results indicate that these flexible OSTs have the potential to be utilized as smart and intelligent radiation sensors for applications such as medical imaging, radiation therapy, and portable dosimeters for emergency responders and armed forces.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"144 ","pages":"Article 107293"},"PeriodicalIF":2.7,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144571160","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

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 : 2025-07-01 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":"2025-07-01","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

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 : 2025-06-26 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":"2025-06-26","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

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 : 2025-06-20 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":"2025-06-20","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