Photothermal hydrophobic coatings are considered as a promising passive anti-/deicing strategy, but their expensive manufacturing process has hindered their large-scale commercial application. Herein, we have constructed a double-shell n-Eicosane@TiO@CuS phase change microcapsules in a facile approach. The microcapsule exhibits latent heat of 127.8 J/g, and the fluctuation of phase transition temperature and enthalpy in 200 DSC cycles is negligible. The microcapsule shows a strong absorption in the whole solar spectrum, owing to the coupling effect of the flower-like superstructure and localized surface plasmon resonance effect of CuS shell. Liquid marbles are spontaneously formed owing to the large surface roughness and superhydrophobic character of the microcapsule. The microcapsule-based coating surface reveals efficient anti-/deicing performance under low-temperature condition. Our work not only provides a novel approach for the design of high-performance microcapsules but also offers an effective strategy for photothermal anti-/deicing applications.
{"title":"Fabrication of hydrophobic photothermal phase change microcapsules for efficient anti-/deicing","authors":"Mingtai Hou, Zeyi Jiang, Xinru Zhang, Wen Sun, Fuqiang Chu, Nien-Chu Lai","doi":"10.1016/j.mtchem.2024.102205","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102205","url":null,"abstract":"Photothermal hydrophobic coatings are considered as a promising passive anti-/deicing strategy, but their expensive manufacturing process has hindered their large-scale commercial application. Herein, we have constructed a double-shell n-Eicosane@TiO@CuS phase change microcapsules in a facile approach. The microcapsule exhibits latent heat of 127.8 J/g, and the fluctuation of phase transition temperature and enthalpy in 200 DSC cycles is negligible. The microcapsule shows a strong absorption in the whole solar spectrum, owing to the coupling effect of the flower-like superstructure and localized surface plasmon resonance effect of CuS shell. Liquid marbles are spontaneously formed owing to the large surface roughness and superhydrophobic character of the microcapsule. The microcapsule-based coating surface reveals efficient anti-/deicing performance under low-temperature condition. Our work not only provides a novel approach for the design of high-performance microcapsules but also offers an effective strategy for photothermal anti-/deicing applications.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-16DOI: 10.1016/j.mtchem.2024.102199
Qing Yao, Yuan Wang, Minqiang Wang, Nikolai V. Gaponenko, Zheyuan Da, Jindou Shi, Chen Zhang, Junnan Wang
Carbon dots (CDs) room temperature phosphorescent (RTP) materials have great application prospects in optoelectronic devices, advanced anti-counterfeiting, information encryption and bio-imaging due to its excellent optical properties. However, achieving long-lifetime phosphorescence with color-tunable RTP CDs is a huge challenge. In this work, precursor molecules with different degrees of conjugation: 4-ethoxycarbonyl phenylboronic acid (4-EpBA), 9-phenanthracenylboronic acid (9-PhBA) and 1-pyrenylboronic acid (1-PyBA) were combined with urea and ammonium pentaborate (AP) matrix through high temperature pyrolysis method, long-lifetime and colorful phosphorescent CDs composites of 4-EpBA@Urea, 9-PhBA@Urea and 1-PyBA@AP were successfully synthesized. As the degree of conjugation of the precursor molecules increased, the phosphorescence colors of 4-EpBA@Urea, 9-PhBA@Urea and 1-PyBA@AP were blue, green and orange, respectively. In addition, since 1-PyBA@Urea could not produce orange phosphorescence emission, we chose 1-PyBA@AP that was able to generate bright orange phosphorescence after UV excitation. Furthermore, the rationality behind phosphorescence emission mechanism and wavelength modulation is further conformed by density functional theory (DFT) calculations. Finally, RTP CDs composites are successfully applied for advanced anti-counterfeiting and optical information storage.
碳点（CD）室温磷光（RTP）材料因其优异的光学特性，在光电器件、高级防伪、信息加密和生物成像等领域具有广阔的应用前景。然而，实现可调色 RTP CD 的长寿命磷光是一项巨大的挑战。在这项工作中，前体分子具有不同的共轭程度：通过高温热解方法，将4-乙氧羰基苯硼酸（4-EpBA）、9-菲硼酸（9-PhBA）和1-芘硼酸（1-PyBA）与尿素和五硼酸铵（AP）基质结合，成功合成了4-EpBA@尿素、9-PhBA@尿素和1-PyBA@AP的长寿命彩色磷光光盘复合材料。随着前驱体分子共轭度的增加，4-EpBA@Urea、9-PhBA@Urea 和 1-PyBA@AP 的磷光颜色分别为蓝色、绿色和橙色。此外，由于 1-PyBA@Urea 不能产生橙色磷光，我们选择了在紫外激发后能产生明亮橙色磷光的 1-PyBA@AP。此外，密度泛函理论（DFT）计算进一步证实了磷光发射机制和波长调制的合理性。最后，RTP CD 复合材料被成功应用于先进的防伪和光信息存储领域。
{"title":"Regulation of molecular conjugation to realize mult-color room temperature phosphorescence of carbon dots in urea and ammonium pentaborate precursor matrices","authors":"Qing Yao, Yuan Wang, Minqiang Wang, Nikolai V. Gaponenko, Zheyuan Da, Jindou Shi, Chen Zhang, Junnan Wang","doi":"10.1016/j.mtchem.2024.102199","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102199","url":null,"abstract":"Carbon dots (CDs) room temperature phosphorescent (RTP) materials have great application prospects in optoelectronic devices, advanced anti-counterfeiting, information encryption and bio-imaging due to its excellent optical properties. However, achieving long-lifetime phosphorescence with color-tunable RTP CDs is a huge challenge. In this work, precursor molecules with different degrees of conjugation: 4-ethoxycarbonyl phenylboronic acid (4-EpBA), 9-phenanthracenylboronic acid (9-PhBA) and 1-pyrenylboronic acid (1-PyBA) were combined with urea and ammonium pentaborate (AP) matrix through high temperature pyrolysis method, long-lifetime and colorful phosphorescent CDs composites of 4-EpBA@Urea, 9-PhBA@Urea and 1-PyBA@AP were successfully synthesized. As the degree of conjugation of the precursor molecules increased, the phosphorescence colors of 4-EpBA@Urea, 9-PhBA@Urea and 1-PyBA@AP were blue, green and orange, respectively. In addition, since 1-PyBA@Urea could not produce orange phosphorescence emission, we chose 1-PyBA@AP that was able to generate bright orange phosphorescence after UV excitation. Furthermore, the rationality behind phosphorescence emission mechanism and wavelength modulation is further conformed by density functional theory (DFT) calculations. Finally, RTP CDs composites are successfully applied for advanced anti-counterfeiting and optical information storage.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-16DOI: 10.1016/j.mtchem.2024.102203
Ying Lv, Yan Xue, Zhiwei Xia, Yu Liu, Junping Hu, Jianwen Li, Yuting Cai, Peng Zheng, Cunjian Lin, Shihai You
Cyan-emitting inorganic phosphors capable of closing the “cyan gap” (480–520 nm) are essential for developing human-centric, full-visible-spectrum phosphor-converted white light-emitting diodes (pc-LEDs). Traditionally, these materials are created by doping activators into the standard crystallographic sites of selected hosts. Here, we report an efficient, broadband cyan-emitting phosphor SiO:Al,Eu produced by engineering interstitial activators Eu into the channel along -axis of -quartz lattice. Under 365 nm light excitation, the compound exhibits a broad cyan emission band spanning from 390 to 675 nm, with a full width of half maximum of 114 nm (4975 cm), thus effectively covering the blue-cyan-green region of visible spectrum. Additionally, it demonstrates excellent thermal stability with a high emission intensity retention of 73% at 423 K. By encapsulating the mixture of the cyan-emitting SiO:Al,Eu and a commercial orange-red phosphor on an ultraviolet ( = 365 nm) chip, a full-visible-spectrum pc-LED is successfully fabricated, showing a Commission Internationale de L'Eclairage 1931 chromaticity coordinate of (0.342, 0.359) and a high color-rendering index of 89. This study not only provides a promising cyan emitter but also inspires the future design of inorganic phosphors.
{"title":"Engineering interstitial Eu2+ in α-quartz creates broadband cyan emission toward full-visible-spectrum white LED lighting","authors":"Ying Lv, Yan Xue, Zhiwei Xia, Yu Liu, Junping Hu, Jianwen Li, Yuting Cai, Peng Zheng, Cunjian Lin, Shihai You","doi":"10.1016/j.mtchem.2024.102203","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102203","url":null,"abstract":"Cyan-emitting inorganic phosphors capable of closing the “cyan gap” (480–520 nm) are essential for developing human-centric, full-visible-spectrum phosphor-converted white light-emitting diodes (pc-LEDs). Traditionally, these materials are created by doping activators into the standard crystallographic sites of selected hosts. Here, we report an efficient, broadband cyan-emitting phosphor SiO:Al,Eu produced by engineering interstitial activators Eu into the channel along -axis of -quartz lattice. Under 365 nm light excitation, the compound exhibits a broad cyan emission band spanning from 390 to 675 nm, with a full width of half maximum of 114 nm (4975 cm), thus effectively covering the blue-cyan-green region of visible spectrum. Additionally, it demonstrates excellent thermal stability with a high emission intensity retention of 73% at 423 K. By encapsulating the mixture of the cyan-emitting SiO:Al,Eu and a commercial orange-red phosphor on an ultraviolet ( = 365 nm) chip, a full-visible-spectrum pc-LED is successfully fabricated, showing a Commission Internationale de L'Eclairage 1931 chromaticity coordinate of (0.342, 0.359) and a high color-rendering index of 89. This study not only provides a promising cyan emitter but also inspires the future design of inorganic phosphors.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Diapers are essential for infants and patients with urinary incontinence. The super-absorbent polymer (SAP) in the core layer of diapers suffers from slow liquid absorption, fault formation, and reverse osmosis. Therefore, it is desirable to construct a core layer that can integrate rapid liquid absorption, uniform retention, and anti-seepage qualities. In this study, a diaper core layer and a three-dimensional fluffy network structure with a wetting gradient was constructed via one-step solution blow spinning (SBS). By regulating the content of the glutaraldehyde (GA) cross-linking agent, absorbent and insoluble fibers could be obtained. The ratio of super-absorbent fibers (SAF) to PAN-PVP micro-/nano fibers in the three-layer fiber structure and the gram weight of the core layer were adjusted. A wetting gradient was established when the weight of the adjusted gradient core layer was 2/3 that of the commercial core layer. The amount of reverse osmosis was reduced by 0.25 g, and the liquid absorption and retention were 30 times and 28.5 times, respectively, two and 3.5 times higher than those of commercial diapers. The SAF prepared by SBS could improve the core layer's liquid absorption rate, retention ratio, and comfort. The fibers are applicable in diapers, sanitary napkins, and other disposable products.
尿布是婴儿和尿失禁患者的必需品。纸尿裤芯层中的超吸收聚合物（SAP）存在液体吸收慢、疵点形成和反渗透等问题。因此，最好能构建一种集快速吸收液体、均匀保持和防渗功能于一体的芯层。本研究通过一步法溶液吹塑纺丝（SBS）构建了纸尿裤芯层和具有润湿梯度的三维绒毛网络结构。通过调节戊二醛（GA）交联剂的含量，可获得吸水性和不溶性纤维。调整了三层纤维结构中超吸水纤维（SAF）与 PAN-PVP 微/纳米纤维的比例以及芯层的克重。当调整后的梯度芯层重量为商用芯层重量的 2/3 时，湿润梯度就建立起来了。反渗透量减少了 0.25 克，吸液量和留液量分别是商品纸尿裤的 30 倍和 28.5 倍，分别是商品纸尿裤的 2 倍和 3.5 倍。用 SBS 制备的 SAF 可以提高芯层的液体吸收率、留着率和舒适度。这种纤维适用于尿布、卫生巾和其他一次性产品。
{"title":"Full micro-nanofiber aerogel with three-dimensional fluffy network structure for rapid liquid absorption and uniform liquid retention in diapers","authors":"Xiaoxiao Chen, Hao Guo, Yanlai Feng, Diedie Wei, Gaohui Fan, Zhikang Cheng, Zhouai Luo, Hui Xu, Yingkun Fu, Hongqin Yu, Xuling Jin, Jianxin He","doi":"10.1016/j.mtchem.2024.102191","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102191","url":null,"abstract":"Diapers are essential for infants and patients with urinary incontinence. The super-absorbent polymer (SAP) in the core layer of diapers suffers from slow liquid absorption, fault formation, and reverse osmosis. Therefore, it is desirable to construct a core layer that can integrate rapid liquid absorption, uniform retention, and anti-seepage qualities. In this study, a diaper core layer and a three-dimensional fluffy network structure with a wetting gradient was constructed via one-step solution blow spinning (SBS). By regulating the content of the glutaraldehyde (GA) cross-linking agent, absorbent and insoluble fibers could be obtained. The ratio of super-absorbent fibers (SAF) to PAN-PVP micro-/nano fibers in the three-layer fiber structure and the gram weight of the core layer were adjusted. A wetting gradient was established when the weight of the adjusted gradient core layer was 2/3 that of the commercial core layer. The amount of reverse osmosis was reduced by 0.25 g, and the liquid absorption and retention were 30 times and 28.5 times, respectively, two and 3.5 times higher than those of commercial diapers. The SAF prepared by SBS could improve the core layer's liquid absorption rate, retention ratio, and comfort. The fibers are applicable in diapers, sanitary napkins, and other disposable products.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-16DOI: 10.1016/j.mtchem.2024.102204
Lu Chen, Peiyang Li, Guichang Shen, Xingbo Kang, Shuai Tang, Tao Zhang, Qi Zhu
Cr-doped phosphors are widely used in the near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) for plant growth lighting in the modern agriculture due to their excellent luminous efficiency and spectral tunability. However, the inevitable energy consumption and heat radiation issues force us to shift our focus to develop a novel plant lighting pattern of energy storage activated by sunlight and NIR afterglow illumination at night. Herein, a series of ZnMgAlGaO:Cr (ZMAGO:Cr) NIR persistent luminescence (PersL) phosphors, achieving a far-red emission at 675–775 nm upon 387 nm or 530 nm excitation is designed. The optimal ZMAGO:Cr ( = 0.6) phosphor exhibits a 194-fold initial NIR afterglow intensity and PersL decay time last for more than 6 h. The enhancement of afterglow originates from the introduction of effective electron traps, which can be precisely controlled by changing the Mg/Ga doping concentration. Meanwhile, by utilizing the photon transmission from SrAlO:Eu,Dy green phosphor to ZMAGO:Cr ( = 0.6) NIR phosphor, the prepared NIR coatings obtain 2.5 times enhanced PersL intensity and afterglow far more than 12 h by sunlight excitation, meeting the requirements of non-electrical excitation and round-the-clock plant lighting. The successful development of NIR coatings based on the ZMAGO:Cr phosphor is expected to accelerate the exploitation of next generation of intelligent and energy friendly light sources for indoor agriculture.
{"title":"Effective electron trap regulation in near-infrared persistent phosphor of ZnAl2O4:Cr3+ for round-the-clock plant lighting","authors":"Lu Chen, Peiyang Li, Guichang Shen, Xingbo Kang, Shuai Tang, Tao Zhang, Qi Zhu","doi":"10.1016/j.mtchem.2024.102204","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102204","url":null,"abstract":"Cr-doped phosphors are widely used in the near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) for plant growth lighting in the modern agriculture due to their excellent luminous efficiency and spectral tunability. However, the inevitable energy consumption and heat radiation issues force us to shift our focus to develop a novel plant lighting pattern of energy storage activated by sunlight and NIR afterglow illumination at night. Herein, a series of ZnMgAlGaO:Cr (ZMAGO:Cr) NIR persistent luminescence (PersL) phosphors, achieving a far-red emission at 675–775 nm upon 387 nm or 530 nm excitation is designed. The optimal ZMAGO:Cr ( = 0.6) phosphor exhibits a 194-fold initial NIR afterglow intensity and PersL decay time last for more than 6 h. The enhancement of afterglow originates from the introduction of effective electron traps, which can be precisely controlled by changing the Mg/Ga doping concentration. Meanwhile, by utilizing the photon transmission from SrAlO:Eu,Dy green phosphor to ZMAGO:Cr ( = 0.6) NIR phosphor, the prepared NIR coatings obtain 2.5 times enhanced PersL intensity and afterglow far more than 12 h by sunlight excitation, meeting the requirements of non-electrical excitation and round-the-clock plant lighting. The successful development of NIR coatings based on the ZMAGO:Cr phosphor is expected to accelerate the exploitation of next generation of intelligent and energy friendly light sources for indoor agriculture.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-10DOI: 10.1016/j.mtchem.2024.102186
Elmira Kashani, Saeid Maghsoudi, Hamid Rezania, Mina Yarazavi, Maryam Hajiabbas, Gábor Benkovics, Erem Bilensoy, Igor Lacík, Abolfazl Heydari
Cyclodextrin polymers (CDPs) are a class of polymers that have been extensively used in diverse scientific and technological fields. These polymers are characterized by the presence of cyclodextrins (CDs) as repeating units within their polymeric networks. The unique structure of CDs has enabled the synthesis of CDPs using multifunctional reagents, resulting in an enormous variety of CDPs with diverse structures and properties. This review article focuses on a key subclass of CDPs, namely those containing ionizable and ionic groups (I-CDPs). These polymers can be synthesized by introducing ionizable and ionic groups into the CDPs networks. The first I-CDPs were introduced in 1985, and, since then, there have been significant advances in their synthesis methods and applications. The remarkable features of I-CDPs are their pH-tunable water solubility and high and tunable binding affinity toward various guests, which are difficult to achieve by charge-neutral CDPs. In this review, we categorize I-CDPs into cationic, anionic, and ampholytic polymers and provide an overview of the progress made in their synthesis and applications. We highlight the creative methods used to introduce charged groups into the structure of CDPs and discuss the properties of I-CDPs that make them suitable for diverse applications.
{"title":"Cyclodextrin polymers containing ionizable and ionic groups: A comprehensive review from classifications and synthesis methods to applications","authors":"Elmira Kashani, Saeid Maghsoudi, Hamid Rezania, Mina Yarazavi, Maryam Hajiabbas, Gábor Benkovics, Erem Bilensoy, Igor Lacík, Abolfazl Heydari","doi":"10.1016/j.mtchem.2024.102186","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102186","url":null,"abstract":"Cyclodextrin polymers (CDPs) are a class of polymers that have been extensively used in diverse scientific and technological fields. These polymers are characterized by the presence of cyclodextrins (CDs) as repeating units within their polymeric networks. The unique structure of CDs has enabled the synthesis of CDPs using multifunctional reagents, resulting in an enormous variety of CDPs with diverse structures and properties. This review article focuses on a key subclass of CDPs, namely those containing ionizable and ionic groups (I-CDPs). These polymers can be synthesized by introducing ionizable and ionic groups into the CDPs networks. The first I-CDPs were introduced in 1985, and, since then, there have been significant advances in their synthesis methods and applications. The remarkable features of I-CDPs are their pH-tunable water solubility and high and tunable binding affinity toward various guests, which are difficult to achieve by charge-neutral CDPs. In this review, we categorize I-CDPs into cationic, anionic, and ampholytic polymers and provide an overview of the progress made in their synthesis and applications. We highlight the creative methods used to introduce charged groups into the structure of CDPs and discuss the properties of I-CDPs that make them suitable for diverse applications.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141612199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-08DOI: 10.1016/j.mtchem.2024.102184
Ashish Gaurav, Chi-Shiang Chen, Chih-Yuan Tsai, Zhi-Ting Ye, Ching-Fuh Lin
Due to their promising optical performance, micro-light emitting diodes (micro-LEDs) based on colour conversion layer (CCL) have garnered significant attention as the next-generation display technology. However, fabricating CCL with excellent conversion efficiency (CE) with minimal blue light leakage for miniaturized sub-pixel designing is still in its infancy. Herein, we have demonstrated CCL of a thickness (<3.5 μm) based on an organic-inorganic hybrid system incorporated with Titanium dioxide (TiO) and Zinc Oxide (ZnO) Nanoparticles (NPs) with high CE. The inclusion of the NPs enhances the absorption of blue light within the CCL. We further combined the CCL with a colour purification filter to mitigate blue light leakage, which recycles blue light and suppresses blue light loss, resulting in improved CE. Specifically, we achieved a CE of 83.80 % for the green CCL and 66.97 % for the red CCL. Subsequently, full-colour arrays with a pixel size of 4 μm × 4 μm were successfully patterned and fabricated based on reduced thickness and improved optical performance using NP-doped CCL. This paves the way for cost-effective higher-resolution micro-LED displays for various applications.
{"title":"Stable colour conversion layer with enhanced conversion efficiency by incorporating nanoparticles for micro-LED display application","authors":"Ashish Gaurav, Chi-Shiang Chen, Chih-Yuan Tsai, Zhi-Ting Ye, Ching-Fuh Lin","doi":"10.1016/j.mtchem.2024.102184","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102184","url":null,"abstract":"Due to their promising optical performance, micro-light emitting diodes (micro-LEDs) based on colour conversion layer (CCL) have garnered significant attention as the next-generation display technology. However, fabricating CCL with excellent conversion efficiency (CE) with minimal blue light leakage for miniaturized sub-pixel designing is still in its infancy. Herein, we have demonstrated CCL of a thickness (<3.5 μm) based on an organic-inorganic hybrid system incorporated with Titanium dioxide (TiO) and Zinc Oxide (ZnO) Nanoparticles (NPs) with high CE. The inclusion of the NPs enhances the absorption of blue light within the CCL. We further combined the CCL with a colour purification filter to mitigate blue light leakage, which recycles blue light and suppresses blue light loss, resulting in improved CE. Specifically, we achieved a CE of 83.80 % for the green CCL and 66.97 % for the red CCL. Subsequently, full-colour arrays with a pixel size of 4 μm × 4 μm were successfully patterned and fabricated based on reduced thickness and improved optical performance using NP-doped CCL. This paves the way for cost-effective higher-resolution micro-LED displays for various applications.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141612201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-05DOI: 10.1016/j.mtchem.2024.102182
Chaoyang Jia, Dangli Gao, Zhigang Wang, Xiangyu Zhang, Sining Yun, Jin Zhong Zhang, Xiaojun Wang
Persistent luminescence (PersL) phosphors, identified as ideal candidates, hold immense promise for information storage and encryption. However, practical storage and encryption technology using these phosphors remains uncommon due to their weak luminescence intensity and the inconvenience of light sources used in encryption and decryption processes. Here, we have developed SrMgSiGeO:Eu,Mn,Dy phosphor with a super-long PersL beyond 100 h, the higher charge storage capacity and PersL efficiency (17 %) than commercial SrAlO:Eu,Dy phosphors by introduction of co-dopant Mn. This phosphor exhibits rapid and efficient charging capability when exposed to various light sources such as sunlight, light-emitting diode, mobile phone and computer screen. To explain the high charge storage capacity and super-long PersL, we propose a novel trap mechanism based on hole-electron defect pair trap structures. Notably, this phosphor as an anti-counterfeiting material demonstrates high-order encryption by the adding specific information writing process via temperature management. This study provides a new paradigm for future design of PersL phosphors and luminescent anti-counterfeiting.
{"title":"Tailoring traps in Eu2+ activated persistent phosphors for multilevel information storage and encryption","authors":"Chaoyang Jia, Dangli Gao, Zhigang Wang, Xiangyu Zhang, Sining Yun, Jin Zhong Zhang, Xiaojun Wang","doi":"10.1016/j.mtchem.2024.102182","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102182","url":null,"abstract":"Persistent luminescence (PersL) phosphors, identified as ideal candidates, hold immense promise for information storage and encryption. However, practical storage and encryption technology using these phosphors remains uncommon due to their weak luminescence intensity and the inconvenience of light sources used in encryption and decryption processes. Here, we have developed SrMgSiGeO:Eu,Mn,Dy phosphor with a super-long PersL beyond 100 h, the higher charge storage capacity and PersL efficiency (17 %) than commercial SrAlO:Eu,Dy phosphors by introduction of co-dopant Mn. This phosphor exhibits rapid and efficient charging capability when exposed to various light sources such as sunlight, light-emitting diode, mobile phone and computer screen. To explain the high charge storage capacity and super-long PersL, we propose a novel trap mechanism based on hole-electron defect pair trap structures. Notably, this phosphor as an anti-counterfeiting material demonstrates high-order encryption by the adding specific information writing process via temperature management. This study provides a new paradigm for future design of PersL phosphors and luminescent anti-counterfeiting.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Here we report a spatially confined radical addition reaction which occurs in the sub-nanometer scaled interlayers of the expanded graphene sheets during the electrochemical exfoliation processes of graphite. Due to its chemical stability, challenge remains to functionalize graphene simultaneously during the preparation processes. To this, we use tetrachloroaluminate (AlCl) as the co-intercalation anions together with sulfate (SO) for the electrochemical exfoliation of graphite. We revealed the extremely irreversible intercalation of AlCl ions in graphite layers and the generation of C–Cl bonds during electrolysis. Chlorine and oxygen were homogeneously distributed on the basal plane of the obtained graphene, and the controlled functionalization was achieved by tuning the concentration of AlCl anions in the electrolyte solution, indicating the spatially confined chlorine addition reaction occurring between the sub-nanometer interlayers of expanded graphite. Furthermore, the chlorine and oxygen hybrid-substituted graphene exhibited excellent electrocatalytic performance for oxygen reduction reaction. This work demonstrates an innovative radical addition reaction in the confined space at nanometer or subnanometer scale and, meanwhile, provides a direct functionalization of graphene during the electrochemical exfoliation of graphite.
{"title":"Spatially confined radical addition reaction in the sub-nanometer scaled interlayers of electrochemically expanded graphene sheets","authors":"Du-Hong Chen, Zhongyun Yang, Pengyang Zhang, Rajkumar Devasenathipathy, Teng-Xiang Huang, Limin Wang, Dujuan Huang, Zhi-You Zhou, Jian-Feng Li, Dongping Zhan, Zhong-Qun Tian","doi":"10.1016/j.mtchem.2024.102185","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102185","url":null,"abstract":"Here we report a spatially confined radical addition reaction which occurs in the sub-nanometer scaled interlayers of the expanded graphene sheets during the electrochemical exfoliation processes of graphite. Due to its chemical stability, challenge remains to functionalize graphene simultaneously during the preparation processes. To this, we use tetrachloroaluminate (AlCl) as the co-intercalation anions together with sulfate (SO) for the electrochemical exfoliation of graphite. We revealed the extremely irreversible intercalation of AlCl ions in graphite layers and the generation of C–Cl bonds during electrolysis. Chlorine and oxygen were homogeneously distributed on the basal plane of the obtained graphene, and the controlled functionalization was achieved by tuning the concentration of AlCl anions in the electrolyte solution, indicating the spatially confined chlorine addition reaction occurring between the sub-nanometer interlayers of expanded graphite. Furthermore, the chlorine and oxygen hybrid-substituted graphene exhibited excellent electrocatalytic performance for oxygen reduction reaction. This work demonstrates an innovative radical addition reaction in the confined space at nanometer or subnanometer scale and, meanwhile, provides a direct functionalization of graphene during the electrochemical exfoliation of graphite.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Solvothermal method can synthesize ultralarge and high-performance thermoelectric powders with controllable structure, morphology, composition, and grain size. Here, we have developed a facile and surfactant-free solvothermal method for the synthesis of ultralarge AgSe powders. The as-synthesized AgSe powders exhibit the morphology of micro-pillar with the length ranging from several to hundreds of microns, and the average length-diameter ratio of ∼4.9. In as-synthesized AgSe micro-pillars, regardless of the high crystallinity and closely perfect Ag/Se ratio of ∼2, the highly localized lattice distortions and strain fields might indicate partial superionicity of room-temperature orthorhombic AgSe. Compositional and structural analysis after spark plasma sintering indicates the formation of additional Se vacancies due to Se sublimation during the sintering process, which leads to high carrier concentration of ∼1.3 × 10 cm and limits the room-temperature dimensionless figure of merit to ∼0.46. Further optimizing the carrier concentration to ∼1 × 10 cm can theoretically lead to high room-temperature dimensionless figure of merit of ∼1.4. Our study not only renders a facile solvothermal method for the synthesis of AgSe micro-pillars with extensive thermoelectric application potentials.
{"title":"Solvothermal synthesis of micro-pillar shaped Ag2Se and its thermoelectric potential","authors":"Yicheng Yue, Wanyu Lyu, Wei-Di Liu, Xiao-Lei Shi, Raza Moshwan, Nan Wang, Meng Li, Chao Zhang, Zhi-Gang Chen","doi":"10.1016/j.mtchem.2024.102183","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102183","url":null,"abstract":"Solvothermal method can synthesize ultralarge and high-performance thermoelectric powders with controllable structure, morphology, composition, and grain size. Here, we have developed a facile and surfactant-free solvothermal method for the synthesis of ultralarge AgSe powders. The as-synthesized AgSe powders exhibit the morphology of micro-pillar with the length ranging from several to hundreds of microns, and the average length-diameter ratio of ∼4.9. In as-synthesized AgSe micro-pillars, regardless of the high crystallinity and closely perfect Ag/Se ratio of ∼2, the highly localized lattice distortions and strain fields might indicate partial superionicity of room-temperature orthorhombic AgSe. Compositional and structural analysis after spark plasma sintering indicates the formation of additional Se vacancies due to Se sublimation during the sintering process, which leads to high carrier concentration of ∼1.3 × 10 cm and limits the room-temperature dimensionless figure of merit to ∼0.46. Further optimizing the carrier concentration to ∼1 × 10 cm can theoretically lead to high room-temperature dimensionless figure of merit of ∼1.4. Our study not only renders a facile solvothermal method for the synthesis of AgSe micro-pillars with extensive thermoelectric application potentials.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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