Journal of Materials Chemistry C最新文献

{"title":"Performance enhancement of air-stable thieno[2,3-b]thiophene organic field-effect transistors via alkyl chain engineering†","authors":"Seongjin Oh, Hyowon Kang, Choongik Kim and SungYong Seo","doi":"10.1039/D5TC01512J","DOIUrl":"https://doi.org/10.1039/D5TC01512J","url":null,"abstract":"<p >In this study, four novel thieno[2,3-<em>b</em>]thiophene (TT) small molecules, 2,5-bis((5-octylthiophen-2-yl)ethynyl)thieno[2,3-<em>b</em>]thiophene (<strong>1</strong>), 2,5-bis((5-(2-ethylhexyl)thiophen-2-yl)ethynyl)thieno[2,3-<em>b</em>]thiophene (<strong>2</strong>), 3,4-dimethyl-2,5-bis((5-octylthiophen-2-yl)ethynyl)thieno[2,3-<em>b</em>]thiophene (<strong>3</strong>), and 2,5-bis((5-(2-ethylhexyl)thiophen-2-yl)ethynyl)-3,4-dimethylthieno[2,3-<em>b</em>]thiophene (<strong>4</strong>), were synthesized and explored as channel layers for organic field-effect transistors (OFETs). Conjugated triple bonds and flexible alkyl side chains were strategically integrated into the TT core to promote efficient carrier transport. The compounds were characterized using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), UV-visible spectroscopy (UV-vis), and cyclic voltammetry (CV) to evaluate their thermal stability, optical properties, and electrochemical behavior. Organic thin films were prepared through solution shearing, and their surface morphology and microstructure were analyzed using atomic force microscopy (AFM) and X-ray diffraction (XRD). Among the four, compounds <strong>1–3</strong> showed p-channel activity. Notably, compound <strong>1</strong>, which possesses linear alkyl side chains, demonstrated decent electrical performance under ambient conditions, achieving a hole mobility of 0.42 cm<small>²</small> V<small>⁻¹</small> s<small>⁻¹</small> and a current on/off ratio exceeding 10<small>⁸</small>. These results reveal that appropriate alkyl chain engineering enhances molecular packing and crystallinity, thereby improving device performance. Furthermore, devices based on compound <strong>1</strong> maintained stable operation upon 90-day storage, demonstrating excellent air stability.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 25","pages":" 12675-12684"},"PeriodicalIF":5.7,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144492521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Natural waxes from plant and animal origin as dielectrics for low-voltage organic field effect transistors.","authors":"Cristian Vlad Irimia, Cigdem Yumusak, Yasin Kanbur, Corina Schimanofsky, Boyuan Ban, Martin Ciganek, Petr Sedlacek, Jozef Krajcovic, Rosarita D'Orsi, Alessandra Operamolla, Oliver Brüggemann, Yolanda Salinas, Andreas Petritz, Barbara Stadlober, Rahul Mourya, Christian Teichert, Heinz Langhals, Niyazi Serdar Sariciftci, Mihai Irimia-Vladu","doi":"10.1039/d5tc01419k","DOIUrl":"10.1039/d5tc01419k","url":null,"abstract":"<p><p>We demonstrate in this work the practical use of naturally extracted waxes of plant and animal origin, <i>i.e.</i>, beeswax, carnauba wax, rice bran wax, lanolin wax, and two shellac waxes as dielectrics in organic field effect transistors (OFETs). We present a thorough characterization of their material properties, processability and film forming characteristic, surface characterization, dielectric investigation and the fabrication of field effect transistors with two classic organic semiconductors, <i>i.e.</i>, pentacene and fullerene C₆₀. We show that operating voltages as low as 1 V are possible for all the OFETs using blade coating as fabrication method of waxes solubilized in their appropriate solvent, chloroform or <i>n</i>-octane. Although in general difficult to process in thin films, we demonstrate in this work the practical applicability of these natural waxes for electronics fabrication.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" ","pages":""},"PeriodicalIF":5.7,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12208171/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144551463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Valley topological phase transitions under the combined effects of electronic correlation and strain in the H-TiSeBr monolayer†","authors":"Xiang-Jie Chen, Yong-Hu Xu, Meng-Ran Qin, Pei Zhang, Zhen Gao, Yao He and Kai Xiong","doi":"10.1039/D5TC01288K","DOIUrl":"https://doi.org/10.1039/D5TC01288K","url":null,"abstract":"<p >The valley-polarized quantum anomalous Hall (VP-QAH) effect induced by external fields (such as strain) has attracted widespread attention as an emerging physical phenomenon. In this paper, we predict through first-principles calculations that the H-TiSeBr monolayer is a room-temperature ferromagnetic semiconductor with a Curie temperature of 350 K. When the magnetization direction is perpendicular to the plane, a valley polarization of 56.95 meV arises in the conduction band. Interestingly, under compressive strains of −1.32% and −1.165%, the material exhibits two half-valley metal (HVM) states. Between these two HVM states, the band inversion between d<small>_<em>xy</em></small> + d<small>_{<em>x</em><small>²</small>−<em>y</em><small>²</small>}</small> and d<small>_{<em>z</em><small>²</small>}</small> at the −K valley leads to the emergence of the valley-polarized quantum anomalous Hall (VP-QAH) phase. Further research reveals that the reduced electronic correlation enables the H-TiSeBr monolayer to maintain the VP-QAH phase over a broader strain range. Combined with k·p model analysis, we demonstrate that this phenomenon primarily arises from the decreased −K (K) to −K (K) deformation potential constant induced by the decrease of the electronic correlation. Our findings provide new insights for manipulating valleytronics and enhancing the fundamental understanding of valley-related physical mechanisms.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 25","pages":" 13061-13069"},"PeriodicalIF":5.7,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144492538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of coal pitch-derived carbon dots with yellow emission and improved photoluminescence quantum yield through pre-surface engineering and nitrogen doping†","authors":"Sha Ye, Qing Chang, Chaorui Xue, Ning Li, Bin Liu, Yaling Wang, Jinlong Yang and Shengliang Hu","doi":"10.1039/D5TC01855B","DOIUrl":"https://doi.org/10.1039/D5TC01855B","url":null,"abstract":"<p >Carbon dots (CDs) have unique advantages as the luminophores of optoelectronic devices. Taking advantage of the carbon-rich nature of coal pitch, converting coal pitch into CDs is an efficient avenue for the noncombustive use of coal pitch in response to the global carbon neutralization demand. However, to achieve coal pitch-derived CDs with long wavelength emission and high photoluminescence quantum yield (PLQY) remains a great challenge. Herein, a strategy to tailor the PL properties of coal pitch-derived CDs is developed. It includes introducing nitro groups on the surface of coal pitch (NO<small>₂</small>-coal pitch) followed by solvothermal treatment of NO<small>₂</small>-coal pitch and aspartic acid (ASP), which effectively promotes the dehydration and carbonization processes and favorably increases the content of pyrrolic N in the CDs. As a result, yellow-emissive CDs (y-CDs) with an improved PLQY of 34% are obtained. Transparent y-CD polymer films with solid-state fluorescence are fabricated, and their potential application for light emitting diodes (LEDs) is demonstrated. The current work provides a feasible way to regulate the PL properties of coal pitch-derived CDs for wide application.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 24","pages":" 12263-12270"},"PeriodicalIF":5.7,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144323306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dibenzothiophene sulfone-based n-type emissive organic semiconductor†","authors":"Xianneng Chen, Qingbin Li, Yumin Liu, Shaoqing Guan, Pu Wang, Ziyi Xie, Xiangyu Tan, Dan Liu, Molin Shen, Can Gao, Shiming Zhang and Huanli Dong","doi":"10.1039/D5TC00969C","DOIUrl":"https://doi.org/10.1039/D5TC00969C","url":null,"abstract":"<p >Developing high-mobility emissive organic semiconductors (OSCs) is crucial for organic light-emitting transistors (OLETs), which belong to a type of the smallest integrated optoelectronic devices, with great potential in next-generation display technologies. Although p-type high-mobility emissive OSCs have achieved considerable progress, n-type OSC materials have rarely been reported. Herein, we designed and synthesized an n-type dibenzothiophene sulfone-based emissive organic semiconductor of DPIDBSO with photoluminescence quantum yields (PLQYs) of 30% in the solid state. Interestingly, it was found that in the DPIDBSO crystal, the growth direction was along the short axis of the molecule rather than along the π–π stacking direction owing to multiple weak hydrogen bonds and the presence of a crystal growth dead zone. Leveraging this “special” crystal, DPIDBSO demonstrated typical n-type transport with an electron mobility of 0.17 cm<small>²</small> V<small>⁻¹</small> s<small>⁻¹</small>. More importantly, DPIDBSO-based devices with only Ag electrodes showed obvious electroluminescence with an immobile emission zone in the unipolar mode. This work provides deep insights into the development of n-type OSCs with tunable optoelectronic properties through the control of the aggregation state towards high-performance OLETs.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 26","pages":" 13448-13453"},"PeriodicalIF":5.7,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144550812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prolonging the lifetime of quasi-2D perovskite blue LEDs via DMAcPA doping for defect passivation†","authors":"Yu-Chuan Huang, Chien-Cheng Li, Tzu-Yu Huang, Yu-Hsuan Lai, Xin-Kai Gao, Jia-Xin Li, Chang-Hua Liu, Hao-Chung Kuo, Ray-Hua Horng and Chih-Shan Tan","doi":"10.1039/D5TC00607D","DOIUrl":"https://doi.org/10.1039/D5TC00607D","url":null,"abstract":"<p >In this study, we report the development of high-performance quasi-2D blue perovskite light-emitting diodes (PeLEDs) through the incorporation of (4-(2,7-dibromo-9,9-dimethylacridin-10(9<em>H</em>)-yl)butyl)phosphonic acid (DMAcPA) into the perovskite precursor solution. The introduction of DMAcPA significantly enhances crystal quality by reducing trap density by 52.47% and improving charge transport, leading to notable gains in both external quantum efficiency (EQE) and device stability. A 2.67-fold increase in carrier lifetime effectively mitigates heat-related issues stemming from nonradiative recombination losses. As a result, DMAcPA-doped devices demonstrate remarkable operational stability, achieving a T80 lifetime of 720 hours and a mean time to failure (MTTF) of 42 days—nearly three times longer than undoped counterparts. These findings highlight the potential of DMAcPA as a powerful additive for defect passivation and performance enhancement, offering a promising pathway toward the realization of stable and efficient blue PeLEDs for next-generation optoelectronic applications.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 26","pages":" 13355-13366"},"PeriodicalIF":5.7,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144550781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unravelling the UV luminescence of Bi-doped LiYGeO4: a journey from first principles to temperature-dependent photoluminescence","authors":"Inês Proença, José D. Gouveia, Ana V. Girão, Marco Peres, Rodrigo Mateus, Luís C. Alves, Duarte M. Esteves, Ana L. Rodrigues, Maria I. Dias, Katharina Lorenz, Luís Rino, Florinda M. Costa, Teresa Monteiro and Joana Rodrigues","doi":"10.1039/D5TC01676B","DOIUrl":"https://doi.org/10.1039/D5TC01676B","url":null,"abstract":"<p >Materials exhibiting persistent luminescence (PersL) have garnered attention due to their unique ability to emit light for extended periods after the excitation stops. LiYGeO<small>₄</small> has arisen as a promising host for PersL due to its notable defect abundance. When doped with Bi, it can provide a long-lasting ultraviolet emission, which may find interesting applications in areas such as photodynamic therapy or self-sustained photocatalysis. In the present paper, undoped and Bi-doped LiYGeO<small>₄</small> (0.5 mol%) samples were synthesized by solid-state reaction. X-ray diffraction confirmed the presence of the LiYGeO<small>₄</small> phase, alongside residual yttrium germanate phases. Additionally, we calculated its previously undocumented band structure using hybrid density functional theory to provide new theoretical insights. These calculations indicate that LiYGeO<small>₄</small> has a direct bandgap at the Γ point, further supported by the absorption data. Elemental analyses allowed quantification of the samples, identifying the loss of Li during the synthesis. Room temperature (RT) photoluminescence (PL) showed a strong emission band peaked around 350–360 nm. Despite the extensive research conducted on LiYGeO<small>₄</small>:Bi, the mechanisms underlying the PersL phenomenon remain unclear. To address this, we conducted temperature-dependent PL from 17 K to RT, using a 325 nm photon excitation. We propose that, at RT, the observed emission arises from the overlap of the <small>³</small>P<small>⁽¹⁾</small><small>₁</small> → <small>¹</small>S<small>₀</small> and <small>³</small>P<small>⁽²⁾</small><small>₁</small> → <small>¹</small>S<small>₀</small> Bi<small>³⁺</small> intraionic transitions, sublevels of the <small>³</small>P<small>₁</small> state, which is completely split under the local crystal field generated by the ion environment. However, at cryogenic temperatures, the <small>³</small>P<small>₀</small> → <small>¹</small>S<small>₀</small> transition is the dominant one. Moreover, PersL emission was achieved for nearly 7 h, with 250 nm photon excitation for 10 min, arising from a contribution of the overlapped <small>³</small>P<small>⁽¹⁾</small><small>₁</small> → <small>¹</small>S<small>₀</small> and <small>³</small>P<small>⁽²⁾</small><small>₁</small> → <small>¹</small>S<small>₀</small> transitions.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 26","pages":" 13167-13183"},"PeriodicalIF":5.7,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/tc/d5tc01676b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144550797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent development of magneto-optical thin films and integrated photonic devices","authors":"Zixuan Wei, Yucong Yang, Di Wu, Junxian Wang, Xiaoshao Ma, Xuan Zhao, Tianchi Zhang, Jialong Wang, Jun Qin and Lei Bi","doi":"10.1039/D5TC01540E","DOIUrl":"https://doi.org/10.1039/D5TC01540E","url":null,"abstract":"<p >Magneto-optical (MO) materials are widely used in microwave communication, optical communication and optical sensing systems. Most commercial MO materials today are bulk single crystals or ceramics. The development of photonic integrated circuits, terahertz photonics and optical sensing systems require MO thin films for integrated photonic device applications. These devices include integrated MO isolators, circulators, modulators and switches in the optical and terahertz (THz) frequencies, chemical/biomedical sensors, as well as nanophotonic magnetometers. This paper reviews recent progress of MO thin film materials and their applications in integrated photonic devices. Challenges and prospects of MO thin film technology and emerging device applications are also summarized.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 25","pages":" 12628-12649"},"PeriodicalIF":5.7,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144492517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simultaneous electrodeposition of manganese oxide/poly(o-aminophenol) composites as electrode materials for aqueous electrochemical energy storage†","authors":"Shaotong Pei, Bo Lan, Xueting Bai, Yunpeng Liu, Xinlan Yi, Haichao Sun, Weiqi Wang, Mianxiao Wu and Chao Wang","doi":"10.1039/D5TC00814J","DOIUrl":"https://doi.org/10.1039/D5TC00814J","url":null,"abstract":"<p >Developing novel electrode materials is crucial for the development of high-performance electrochemical energy storage devices. Here, a simultaneous electrodeposition method is developed to grow manganese oxide/poly(<em>o</em>-aminophenol) (MnO<small>_<em>x</em></small>/PoAP) composites on a carbon paper substrate. The formed MnO<small>_<em>x</em></small>/PoAP exhibits a crystalline Mn<small>_1.92</small>O<small>₄</small> phase, and the surface of MnO<small>_<em>x</em></small>/PoAP is rough. The electrochemical energy storage properties of the composites have been investigated, and the optimized MnO<small>_<em>x</em></small>/PoAP can store charge as a battery-type electrode with a specific capacity of 100.88 mA h g<small>⁻¹</small> at 1 A g<small>⁻¹</small> in 2 M (NH<small>₄</small>)<small>₂</small>SO<small>₄</small> and a specific capacity of 166.94 mA h g<small>⁻¹</small> at 1 A g<small>⁻¹</small> in 2 M KCl. Compared to the MnO<small>_<em>x</em></small> and PoAP prepared using the same electrochemical method, the good charge storage performance of MnO<small>_<em>x</em></small>/PoAP is mainly attributed to the increased number of active sites and more facile ion diffusion induced by the unique morphology. The charge storage mechanism has been investigated, and the redox processes of carbonyl/hydroxyl groups, amino/imino groups and Mn<small>^3+/4+</small> are all involved in charge storage, along with the insertion and extraction of cations. When assembled as an aqueous electrochemical energy storage device with MnO<small>_<em>x</em></small>/PoAP and a 2 M (NH<small>₄</small>)<small>₂</small>SO<small>₄</small> solution, a specific capacity of 25.35 mA h g<small>⁻¹</small> at 1 A g<small>⁻¹</small> is achieved, along with a specific energy density of 57.24 W h kg<small>⁻¹</small> at a specific power density of 1080 W kg<small>⁻¹</small>. In addition, the device also shows excellent cycling performance (86.02%) after 10 000 cycles. These indicate that forming composites of conducting polymers and inorganic nanostructures is a viable route to achieving high electrochemical energy storage performance.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 25","pages":" 12994-13006"},"PeriodicalIF":5.7,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144492533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The magic methyl effect of thermally activated delayed fluorescent emitters on blue organic light-emitting diodes†","authors":"Yufang Li, Rangani Wathsala Weerasinghe, Yanmei Hu, Xiaolan Tan, Baoshuo Cai, Chihaya Adachi and Chin-Yiu Chan","doi":"10.1039/D5TC01486G","DOIUrl":"https://doi.org/10.1039/D5TC01486G","url":null,"abstract":"<p >A methyl group is a common substituent in medicinal chemistry. The introduction of methyl groups always results in a profound enhanced biological activity of pharmaceuticals, known as the magic methyl effect. Meanwhile, a methyl group is also widely used for the construction of organic materials in organic light-emitting diodes (OLEDs). In this study, we systematically study the methyl effect of blue thermally activated delayed fluorescent (TADF) emitters on the photophysical properties and device performance in OLEDs. Three new blue TADF emitters with different numbers of methyl groups, namely <strong>1Me-HDT1</strong>, <strong>2Me-HDT1</strong>, and <strong>3Me-HDT1</strong>, have been successfully designed and synthesized. It is found that the methyl group induces steric hindrance and greatly affects their photophysical, thermal, and TADF properties. Their emission maximum is gradually blue-shifted from 464 to 455 nm, simply by increasing the number of methyl groups. However, <strong>3Me-HDT1</strong> resulted in an unexpected low external quantum efficiency (EQE) of only 1%, in which <strong>3Me-HDT1</strong> decomposed upon device fabrication. Contrarily, the devices based on <strong>1Me-HDT1</strong> and <strong>2Me-HDT1</strong> result in high EQEs of up to 21.2% and 19.1%. Furthermore, applying <strong>1Me-HDT1</strong> for hyperfluorescent OLEDs leads to pure-blue electroluminescence at 471 nm, and a higher EQE of 26.2%, together with improved CIE<small>_{<em>x</em>,<em>y</em>}</small> of (0.13, 0.16).</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 25","pages":" 12691-12698"},"PeriodicalIF":5.7,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144492507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}