Organic Electronics最新文献_第2页

Enhancing efficiency and stability of ternary polymer solar cells by employing donor dilution and layer-by-layer fabrication techniques 利用供体稀释和逐层制造技术提高三元聚合物太阳能电池的效率和稳定性

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-05-06 DOI: 10.1016/j.orgel.2025.107262

Yifan Yang , Qiao Wang , Yufa Hou , Chen Yang , Wenfei Shen , Jianguo Tang

{"title":"Enhancing efficiency and stability of ternary polymer solar cells by employing donor dilution and layer-by-layer fabrication techniques","authors":"Yifan Yang , Qiao Wang , Yufa Hou , Chen Yang , Wenfei Shen , Jianguo Tang","doi":"10.1016/j.orgel.2025.107262","DOIUrl":"10.1016/j.orgel.2025.107262","url":null,"abstract":"<div><div>Optimizing the morphology of the active layer is crucial for enhancing the power conversion efficiency (PCE) of polymer solar cells (PSCs), a key objective in organic photovoltaic research. In this study, we achieved significant improvements in active layer morphology by employing a synergistic combination of the sequential deposition method and the donor dilution strategy. In addition, a small amount of molecular acceptor was introduced as a third component into the donor layer, it was proved that the third component facilitated downward penetration of the upper layer of acceptor materials and establishing a gradient distribution of the donor-acceptor interface along the vertical direction, which enhanced both the utilization and transport efficiency of charge carriers. Moreover, the presence of the third component partially suppressed the formation of pure donor phases, further enhancing exciton dissociation and increasing charge collection efficiency. As a result, the short-circuit current density (<em>J</em><sub><em>sc</em></sub>), fill factor (<em>FF</em>), and open-circuit voltage (<em>V</em><sub><em>oc</em></sub>) of the PBQx-TF: L8-BO/BTP-eC9-based PSCs were significantly improved, and ultimately resulting in PCEs surpassding 18 %. Therefore, this work presents a valuable strategy for fabricating high-performance PSCs, offering insights into optimizing active layer morphology for improved photovoltaic performance.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"144 ","pages":"Article 107262"},"PeriodicalIF":2.7,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931471","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, flexible, transparent PEDOT:PSS electrodes by doping strategy 可拉伸，柔性，透明PEDOT:PSS电极掺杂策略

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-04-24 DOI: 10.1016/j.orgel.2025.107260

Xianchun Chen, Junjie Liu, Haoran Zhu, Longzhen Qiu, Xiaohong Wang

{"title":"Stretchable, flexible, transparent PEDOT:PSS electrodes by doping strategy","authors":"Xianchun Chen, Junjie Liu, Haoran Zhu, Longzhen Qiu, Xiaohong Wang","doi":"10.1016/j.orgel.2025.107260","DOIUrl":"10.1016/j.orgel.2025.107260","url":null,"abstract":"<div><div>Flexible transparent electrodes (FTEs) have been widely used in the field of flexible optoelectronic devices due to their simultaneous conductivity and optical transmittance. However, traditional fabrication methods often struggle to achieve an optimal balance between high conductivity and flexibility, and may also involve high costs and complex processes. Consequently, developing a cost-effective strategy for the large-scale production of high-performance FTEs is crucial. Here, high-performance poly(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid) (PEDOT:PSS) spray-coated FTEs were prepared by optimizing the PEDOT:PSS conductive ink formulation through doping strategies. The PEDOT:PSS FTEs exhibit a surface resistance of 70 Ω/sq and a transmittance of 80 % at 550 nm. Notably, their optoelectronic properties remain stable after 100 bends, continuous illumination at 2.43 mW/cm<sup>2</sup>, and exposure to 90 % relative humidity. In addition, large-scale FTEs (15 × 15 cm) were successfully produced using the spray-coating method and effectively implemented in flexible touch screens. These results show that optimized conductive ink formulations have great potential for the preparation of low-cost, large-area and uniform FTEs.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"143 ","pages":"Article 107260"},"PeriodicalIF":2.7,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878542","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

Seed crystal layer-assisted growth of CsPbBr3 perovskite film via electro-spray deposition for sensitive direct X-ray detection 电喷雾沉积法制备CsPbBr3钙钛矿薄膜，用于灵敏的直接x射线检测

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-04-24 DOI: 10.1016/j.orgel.2025.107261

Haomiao Li , Bo Jiao , Mengxin Yan , Zhihang Zhang , Zubair Maroof , Hanxiao Peng , Dongdong Wang , Guijiang Zhou , Zhaoxin Wu , Xun Hou

{"title":"Seed crystal layer-assisted growth of CsPbBr3 perovskite film via electro-spray deposition for sensitive direct X-ray detection","authors":"Haomiao Li , Bo Jiao , Mengxin Yan , Zhihang Zhang , Zubair Maroof , Hanxiao Peng , Dongdong Wang , Guijiang Zhou , Zhaoxin Wu , Xun Hou","doi":"10.1016/j.orgel.2025.107261","DOIUrl":"10.1016/j.orgel.2025.107261","url":null,"abstract":"<div><div>Highly sensitive X-ray detectors play a critical role in various sectors, including medicine, crystallography, and national security. Semiconductor-based direct X-ray detectors have the potential to become the next generation of detectors due to their superior advantages compared to existing detectors. Notably, perovskite materials, renowned for their exceptional performance in the photovoltaic field, could be utilized in the development of novel X-ray detectors with high sensitivity and low detection limits. However, challenges remain in thick film deposition techniques such as inadequate film uniformity, elevated processing temperatures, and limited scalability. In this study, we present an improved E-spray process incorporating a seed crystal layer for achieving high-quality CsPbBr<sub>3</sub> thick film deposition. The incorporation of a seed crystal layer effectively mitigates the coffee-ring effect by depinning the triple-phase contact line of precursor solution droplets, while also promoting oriented growth of the thick CsPbBr<sub>3</sub> film. Furthermore, we demonstrate a direct X-ray detector with remarkable sensitivity (13561.56 μC Gyair<sup>−1</sup> cm<sup>−2</sup> at 5 V) and an impressively low detection limit (0.052 μGys<sup>−1</sup>). We anticipate that these results will stimulate interest in this field and facilitate advancements in perovskite-based detector technology.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"143 ","pages":"Article 107261"},"PeriodicalIF":2.7,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876968","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

Boosting the performance of triple-cation perovskite solar cells through 2-phenylethanethiol treatment and green anti-solvent 通过2-苯乙基硫醇处理和绿色抗溶剂提高三阳离子钙钛矿太阳能电池的性能

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-04-15 DOI: 10.1016/j.orgel.2025.107254

Ali L. Abed , Mustafa K.A. Mohammed , Sadeer M. Majeed , Raid A. Ismail , Duha S. Ahmed , Mika Sillanpää

{"title":"Boosting the performance of triple-cation perovskite solar cells through 2-phenylethanethiol treatment and green anti-solvent","authors":"Ali L. Abed , Mustafa K.A. Mohammed , Sadeer M. Majeed , Raid A. Ismail , Duha S. Ahmed , Mika Sillanpää","doi":"10.1016/j.orgel.2025.107254","DOIUrl":"10.1016/j.orgel.2025.107254","url":null,"abstract":"<div><div>Increasing the efficiency and improving the stability of perovskite solar cells (PSCs) represent major challenges for researchers and offer breakthroughs in renewable energy, driving significant progress toward sustainable energy solutions. The current study aims to increase power conversion efficiency (PCE) along with the stability of triple-cation PSCs. Herein, we employed green ethyl acetate (ETAC) anti-solvent to reduce the toxicity of the PSC production approach. Photovoltaic measurements showed a low PCE of 14.19 % for cells when we used the ETAC antisolvent. This was due to the development of a perovskite film with low crystallinity and small grains. We added 2-phenylethanethiol (2-PET) material to the ETAC anti-solvent to increase the PCE of ETAC-based PSCs. The findings showed that the 2-PET additive lowers defects in both the bulk and the surface of the perovskite layer. This improves charge transfer and inhibits charge recombination in ETAC-based PSCs. The 2-PET molecules interact with under-coordinated Pb<sup>2+</sup> ions and improve the photovoltaic properties of the perovskite layer. The modified ETAC-based PSCs recorded a champion efficiency of 18.46 % with improved operational and ambient air stability. After 45 days of performing an operational stability test, the modified ETAC-based PSCs demonstrated less than 5 % efficiency loss without any encapsulation and at a humidity level of 20 %.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"143 ","pages":"Article 107254"},"PeriodicalIF":2.7,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835137","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 study of the synaptic memory behavior of a flour-based flexible memristor 基于面粉的柔性记忆器的突触记忆行为研究

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-04-15 DOI: 10.1016/j.orgel.2025.107255

Kekang Ma, Gan Li, Hao Wu, Xiaolei Chang, Mengran Wu, Ling Wei

{"title":"A study of the synaptic memory behavior of a flour-based flexible memristor","authors":"Kekang Ma, Gan Li, Hao Wu, Xiaolei Chang, Mengran Wu, Ling Wei","doi":"10.1016/j.orgel.2025.107255","DOIUrl":"10.1016/j.orgel.2025.107255","url":null,"abstract":"<div><div>Biomaterial-based memristors have emerged as a prominent area of research and a hotspot for research on wearable sensors and neuromorphic computing owing to their favorable characteristics of biocompatibility and cost-effectiveness. However, much work is yet to be done to develop biomimetic memristors that are simultaneously flexible and device-stabilized. The study presents a simple approach to preparing flexible memristors using wheat flour (WF) as a functional layer and investigates device stability and synaptic plasticity. The devices can operate stably under continuous voltage scanning for more than 80 weeks, and well emulate biological synaptic functions and synaptic plasticity, such as short-term memory shift to long-term memory and habituation and dehabituation processes. Finally, the mechanisms of the devices' resistive switching and memory transition behaviors were investigated. This work highlights the application of biomaterials in wearable devices and neuromorphic computing, and exemplifies the promise of biomaterials, such as wheat flour, in next-generation environmentally stable and sustainable electronic devices.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"143 ","pages":"Article 107255"},"PeriodicalIF":2.7,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835138","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

An ion-modulated organic electrochemical synaptic transistor for efficient parallel computing and in-situ training 用于高效并行计算和原位训练的离子调制有机电化学突触晶体管

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-04-15 DOI: 10.1016/j.orgel.2025.107253

Xiang Wan , Jie Yan , Shengnan Cui , Yong Xu , Huabin Sun

{"title":"An ion-modulated organic electrochemical synaptic transistor for efficient parallel computing and in-situ training","authors":"Xiang Wan , Jie Yan , Shengnan Cui , Yong Xu , Huabin Sun","doi":"10.1016/j.orgel.2025.107253","DOIUrl":"10.1016/j.orgel.2025.107253","url":null,"abstract":"<div><div>Parallel computing architectures are urgently needed to speed up the training process of artificial neural networks. This study proposes a novel approach to parallel computing using ion-modulated organic electrochemical transistors (OECTs). Thanks to electrochemical doping and de-doping mechanism, the OECTs demonstrate long-term plasticity and exhibit distinguishable conductive states with high linearity. Moreover, our device array enables efficient weighted sum and convolution operations for image feature extraction and performs effectively in simulating hardware-based Faster R-CNN for object detection via transfer learning. The OECTs array, with its separate read and write features and controllable conductive states, achieves the integration of forward inference and backward training, resulting in successful in-situ training of convolutional neural networks (CNNs). The CNNs based on OECTs achieve accuracies of 96.49 % and 82.57 % on the MNIST and Fashion-MNIST datasets, respectively, showcasing the potential of OECTs in edge computing for enhanced resource utilization and time efficiency.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"143 ","pages":"Article 107253"},"PeriodicalIF":2.7,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860436","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

Selection of compatible blended cohost towards boosting performance of TADF-polymer light-emitting electrochemical cells 选择相容混合共宿主提高tadf -聚合物发光电化学电池的性能

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-04-10 DOI: 10.1016/j.orgel.2025.107252

Mei Chen , Jinchang Ye , Jiantian Lu , Sihua Wu , Guanrong Lin , Yingming Ma , Lihui Liu , Yuwei Zhang , Li Niu , Baohua Zhang

{"title":"Selection of compatible blended cohost towards boosting performance of TADF-polymer light-emitting electrochemical cells","authors":"Mei Chen , Jinchang Ye , Jiantian Lu , Sihua Wu , Guanrong Lin , Yingming Ma , Lihui Liu , Yuwei Zhang , Li Niu , Baohua Zhang","doi":"10.1016/j.orgel.2025.107252","DOIUrl":"10.1016/j.orgel.2025.107252","url":null,"abstract":"<div><div>Light-emitting electrochemical cells (LECs) using thermally activated delayed fluorescent (TADF) polymer emitter are attractive since they own the great potential in fabricating robust LECs with low-cost and high efficiencies towards various applications. However, current scarce study disclosed that it is hard to simultaneous optimize electrochemical doping and multi-component miscibility of the emissive layer, which renders luminance and external quantum efficiency (EQE) of TADF-polymer LECs still quite low, e.g. less than 500 cd m<sup>−2</sup> and 1.0 %. Here, we propose to select compatible p-type and n-type small molecules as cohost of TADF-polymer emitter, which is critical to simultaneously achieve balanced, efficient p-/n-type electrochemical doping and charge transport, efficient energy transfer from cohost to TADF-polymer emitter and most importantly well restrained intra- and inter-molecular interactions, i.e. self-aggregation of host and redshift effect of host on TADF-polymer emitter. TADF-polymer LEC using such a qualified compatible cohost achieved a peak luminance of 1292 cd m<sup>−2</sup>, a peak EQE of 2.24 %, and a peak luminous efficiency of 6.89 cd A<sup>−1</sup> at 6.5 V, which is distinctly superior to that of control devices and earlier report of TADF-polymer LECs. It proves the effectiveness of such strategy and provides a research thought on further developments.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"142 ","pages":"Article 107252"},"PeriodicalIF":2.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815614","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

Design of non-Aufbau organic radicals based on TTM/TTBrM core 基于TTM/TTBrM核心的非aufbau有机自由基设计

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-04-03 DOI: 10.1016/j.orgel.2025.107248

Ying Gao , Yong Wu , Bo Ren , Yan Li

{"title":"Design of non-Aufbau organic radicals based on TTM/TTBrM core","authors":"Ying Gao , Yong Wu , Bo Ren , Yan Li","doi":"10.1016/j.orgel.2025.107248","DOIUrl":"10.1016/j.orgel.2025.107248","url":null,"abstract":"<div><div>Non-Aufbau organic radicals with SOMO-HOMO inversion (SHI) have been attracting significant interest from both theoretical and experimental perspectives. The unusual orbital ordering in these systems makes their electronic properties apart from the more common case, where the unpaired electron is filled in the SOMO which is higher in energy than HOMO. In this work, we designed a series of radical systems based on well-known TTM/TTBrM core, functionalized by various electron donor groups (PDMAC, PPTA, PPXZ, BFCz, PA and PT) to achieve SHI-type radicals. Using density functional theory, it was demonstrated that these electron donor groups can modulate the order of SOMO and HOMO, and all radical systems follow the general illustration of SHI that the α-HOMO pair of matching spin orbitals is higher in energy than the SOMO, and is below the corresponding SUMO in non-Aufbau electronic structures. Moreover, all radical systems exhibit fluorescence radiative rate (<em>k</em><sub>r</sub>) approaching approximately 10<sup>7</sup> s<sup>−1</sup>. Ab Initio Molecular Dynamics (AIMD) simulation further indicates that all radical systems are stable at high temperatures. Our calculated results show that the formation of SHI-type radical systems is related to the nature of electron donor units. Consequently, PDMAC, PPTA, PPXZ, BFCz, PA, and PT are reliable choices for designing SHI-type radical emitters. Our work thus establishes molecular guidelines for designing SHI-type radical systems and expands their applicability to organic light-emitting diode emitters.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"142 ","pages":"Article 107248"},"PeriodicalIF":2.7,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800140","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

Optimizing performance and durability of perovskite light-emitting diodes through crystal grain manipulation and defect mitigation 通过晶粒控制和缺陷缓解优化钙钛矿发光二极管的性能和耐久性

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-03-28 DOI: 10.1016/j.orgel.2025.107249

Jiaming Yu , Youqiang Zhuge , Jincheng Lou , Taifei Zhou , Yiying Tan , Yachun Guo , Shuguang Zhang , Junbiao Peng

{"title":"Optimizing performance and durability of perovskite light-emitting diodes through crystal grain manipulation and defect mitigation","authors":"Jiaming Yu , Youqiang Zhuge , Jincheng Lou , Taifei Zhou , Yiying Tan , Yachun Guo , Shuguang Zhang , Junbiao Peng","doi":"10.1016/j.orgel.2025.107249","DOIUrl":"10.1016/j.orgel.2025.107249","url":null,"abstract":"<div><div>Recent advancements in quasi-two-dimensional perovskite light-emitting diodes (PeLEDs) have garnered significant attention due to their attractive properties, including facile solution processability, tunable emission spectra, and cost effectiveness. However, a critical challenge hindering their performance remains the quality of the perovskite emitting layer. Morphological and structural imperfections such as pinholes and halide vacancies, can significantly impede the subsequent layer deposition, leading to the formation of leakage current pathways. Furthermore, these lattice defects often serve as non-radiative recombination centers, compromising the device's overall luminescence efficiency. This study presents a facile strategy to address these limitations by incorporating polyethylene oxide (PEO) and trimethylolpropane triacrylate (TMPTA) as additives within the perovskite precursor solution. The high viscosity of PEO effectively restricts the diffusion of perovskite precursor, leading to the formation of smaller and more uniform crystal grains. In addition, the C=O functional group in TMPTA interacts favorably with uncoordinated Pb<sup>2+</sup> cations in perovskite, thereby suppressing non-radiative recombination processes. By meticulously optimizing the volume ratio of PEO and TMPTA additives, effective passivation of perovskite film defects and manipulation of crystal grain morphology are achieved, leading to a significant enhancement of the perovskite emitting layer quality. Consequently, the maximum current efficiency and external quantum efficiency of green light-emitting diodes reach 45.3 cd/A and 12.01 %, respectively. This work establishes a simple and effective methodology for fabricating efficient and stable PeLEDs.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"142 ","pages":"Article 107249"},"PeriodicalIF":2.7,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739061","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

Revealing the memory effect in phototransistors with vertical phase separation of conjugated/insulating polymer blends through film-on-water interface self-assembly 通过水膜界面自组装揭示共轭/绝缘聚合物共混物垂直相分离在光电晶体管中的记忆效应

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-03-26 DOI: 10.1016/j.orgel.2025.107230

Yan-Ting Chen , You-Wei Cao , Yu-Chih Hsu , Yan-Cheng Lin , Yang-Yen Yu

{"title":"Revealing the memory effect in phototransistors with vertical phase separation of conjugated/insulating polymer blends through film-on-water interface self-assembly","authors":"Yan-Ting Chen , You-Wei Cao , Yu-Chih Hsu , Yan-Cheng Lin , Yang-Yen Yu","doi":"10.1016/j.orgel.2025.107230","DOIUrl":"10.1016/j.orgel.2025.107230","url":null,"abstract":"<div><div>This study utilizes a blend of poly (3-hexylthiophene) (P3HT) and poly (1-pyrenemethyl methacrylate) (PPyMA) polymers to achieve vertical phase separation through air/liquid interface self-assembly. Due to the surface energy mismatch of these blends, a bilayer structure is formed between the conjugated and insulating polymers. The blended thin films are applied to phototransistor memory devices, with PPyMA as a photoactive electret and P3HT as a semiconductor channel. A comparative study of the two-transfer direction water side (forward structure) and air side (reverse structure) reveals that the vertical phase separation morphology of the aromatic side groups in PPyMA, along with its conjugation, is closely related to the photoresponse, memory retention, and durability of the photomemory devices. Electrical analysis shows that the device fabricated with the forward transfer (P3HT/PPyMA) can achieve photo writing through exposure to ultraviolet light at 265 nm, 310 nm, 365 nm, and blue light at 455 nm, while electrical erasure is performed via gate bias, resulting in a wide memory window (∼48.7 V). The device also exhibits a stable memory ratio in repeated write/erase measurements and long-term stability exceeding 10<sup>4</sup> s. In contrast, the device fabricated with the reverse transfer (PPyMA/P3HT), due to the reverse bilayer structure, required hole injection to pass through the insulating PPyMA layer, and holes may recombine with stored electrons during vertical transport, thereby dismissing the memory mechanism. As a result, the device cannot effectively store charges to achieve memory retention. This study demonstrates vertical phase separation through air/liquid interface self-assembly and reveals the photoresponse and charge storage mechanisms of photomemory devices.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"142 ","pages":"Article 107230"},"PeriodicalIF":2.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768617","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