Organic Electronics最新文献_第2页

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}

引用次数: 0

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

Enhanced photovoltaic performance of carbon-based perovskite solar cells through synergetic passivation effects via bulk and surface 碳基钙钛矿太阳能电池通过体和表面协同钝化效应增强光伏性能

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-06-19 DOI: 10.1016/j.orgel.2025.107287

Zhenbo Cao , Jianming Mao , Dan Lu , Shoaib Iqbal , Mengqi Geng , Jialiang Li , Le Jiang , Xinrui Ma , Yubin Guo , Tingting Xu

{"title":"Enhanced photovoltaic performance of carbon-based perovskite solar cells through synergetic passivation effects via bulk and surface","authors":"Zhenbo Cao , Jianming Mao , Dan Lu , Shoaib Iqbal , Mengqi Geng , Jialiang Li , Le Jiang , Xinrui Ma , Yubin Guo , Tingting Xu","doi":"10.1016/j.orgel.2025.107287","DOIUrl":"10.1016/j.orgel.2025.107287","url":null,"abstract":"<div><div>Despite significant efficiency improvements, the long-term stability of carbon-based perovskite solar cells (PSCs) remains a critical challenge. Passivation treatment of perovskite films has been proven to considerably improve the performance of PSCs, including power conversion efficiency (PCE) and long-term stability. This study utilizes a small molecule 2-amino-5-(trifluoromethyl) pyridine (5-TFMAP) with bidentate groups, in conjunction with 2-phenylethanamine iodide (PEAI), for passivating both the grain boundaries and surface of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> films in carbon-based PSCs. The amino group of PEAI, the two electron rich nitrogen atoms and amino group on the pyridine ring of 5-TFMAP all have strong interactions with the under-coordinated Pb<sup>2+</sup>, and trifluoromethyl of 5-TFMAP can improve the hydrophobicity of perovskite films. As a result, the optimal PCE of the carbon-based PSCs after dual passivation is 15.2%, while the efficiency of the control device is 11.2%. In addition, the long-term stability of PSCs treated with dual passivation is significantly enhanced, with the PCE retaining 80% of its initial value after 1200 h of storage at room temperature under a relative humidity of approximately 35%. The remarkable performance of the as-fabricated cells can be attributed to the combined effect of PEAI and 5-TFMAP, which separately passivate the bulk and surfaces of perovskite films, effectively decreasing defect density, improving carrier transport, and reducing nonradiative recombination. This work provides valuable insights towards improving the PCE and stability of carbon-based PSCs by employing combined passivation techniques.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"144 ","pages":"Article 107287"},"PeriodicalIF":2.7,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144548477","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

Crystallization regulation and ion migration suppression enabled by bifunctional lithium difluoro (oxalato) borate additive for stable perovskite solar cells 双功能双氟硼酸锂添加剂对稳定钙钛矿太阳能电池的结晶调节和离子迁移抑制作用

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-06-14 DOI: 10.1016/j.orgel.2025.107285

Rana Shahid Mahmood , Weicun Chu , Riming Nie

{"title":"Crystallization regulation and ion migration suppression enabled by bifunctional lithium difluoro (oxalato) borate additive for stable perovskite solar cells","authors":"Rana Shahid Mahmood , Weicun Chu , Riming Nie","doi":"10.1016/j.orgel.2025.107285","DOIUrl":"10.1016/j.orgel.2025.107285","url":null,"abstract":"<div><div>Although perovskite solar cells (PSCs) are growing rapidly to achieve higher photovoltaic performance, their practical applications have still been obstructed by stability issues in humid atmosphere. Here, we adopted an additive engineering (one additive in two layers) strategy by doping organic-inorganic dual nature additive lithium difluoro(oxalato)borate (Li-DFOB) into lead iodide (PbI<sub>2</sub>) and Spiro-OMeTAD, resulting in enhanced photovoltaic performance and long-term stability of PSCs. The incorporation of Li-DFOB can enhance perovskite crystal quality and moisture resistance of the hole transporting layer by suppressing ion migration, charge carrier recombination, and reducing hysteresis. A replacement of Li-TFSI with a stable Li-DFOB salt in Spiro-OMeTAD can increase the hydrophobicity of the hole transporting layer (HTL) by preventing degradation in humid air and improve the charge carrier transportation. The prepared devices can maintain 98.7 % of their initial power conversion efficiency (PCE), 24.07 % after 624 h in ambient conditions. This additive engineering strategy recommends such dual-nature additives to enhance the performance and stability of PSCs, leading to water-resistant devices.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"144 ","pages":"Article 107285"},"PeriodicalIF":2.7,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297260","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

Potential-based model for asymmetric and symmetric double-gate organic thin-film transistors 非对称和对称双栅有机薄膜晶体管的电势模型

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-06-10 DOI: 10.1016/j.orgel.2025.107286

Xiaohui Li , Yan Yang , Zongcheng Su , Yu Xiong , Changjiang Chen , Long Wang , Wei Zhou , Hongjun Wang , Xiaoxin Xu

引用次数: 0