Yong Cheon Park, Kihoon Jeong, Dahye Ahn, Youson Kim, S. Im
Lamination of thin film encapsulation (TFE) layer is regarded as one of the most promising methods that enables the reliable operation of organic electronic devices by attaching the TFE layers thereon directly using an adhesive layer. In this study, a low-temperature curable adhesive thin film with low glass transition temperature (Tg) is newly designed and synthesized. Low Tg allows conformal contact at the interface of the adhesive layer and the substrate subsequently leads to the enhancement of adhesion, and thus the barrier performance of the lamination of barrier film. In order to fabricate a low-Tg adhesive layer, glycidyl methacrylate (GMA) was copolymerized with 2-hydroxyethyl acrylate (HEA) monomer in vapor phase via initiated chemical vapor deposition. With a 5 μm-thick p(GMA-co-HEA) adhesive layer, a strong adhesion was readily achieved by curing it at 60 ℃ for 1 hr, with the peel strength of 16.6 N/25 mm, and the water vapor transmission rate (WVTR) of glass laminated encapsulation was as low as 3.4×10-3 g/m2∙day at an accelerating condition (38 ℃, 90% relative humidity). We believe the low-temperature curable thin adhesive layer will serve as a powerful material for the lamination of organic electronic devices in damage-free way.
{"title":"A Low-Temperature Curable Conformal Adhesive Layer for Monolithic Lamination of Thin Film Encapsulation","authors":"Yong Cheon Park, Kihoon Jeong, Dahye Ahn, Youson Kim, S. Im","doi":"10.1055/a-2012-2147","DOIUrl":"https://doi.org/10.1055/a-2012-2147","url":null,"abstract":"Lamination of thin film encapsulation (TFE) layer is regarded as one of the most promising methods that enables the reliable operation of organic electronic devices by attaching the TFE layers thereon directly using an adhesive layer. In this study, a low-temperature curable adhesive thin film with low glass transition temperature (Tg) is newly designed and synthesized. Low Tg allows conformal contact at the interface of the adhesive layer and the substrate subsequently leads to the enhancement of adhesion, and thus the barrier performance of the lamination of barrier film. In order to fabricate a low-Tg adhesive layer, glycidyl methacrylate (GMA) was copolymerized with 2-hydroxyethyl acrylate (HEA) monomer in vapor phase via initiated chemical vapor deposition. With a 5 μm-thick p(GMA-co-HEA) adhesive layer, a strong adhesion was readily achieved by curing it at 60 ℃ for 1 hr, with the peel strength of 16.6 N/25 mm, and the water vapor transmission rate (WVTR) of glass laminated encapsulation was as low as 3.4×10-3 g/m2∙day at an accelerating condition (38 ℃, 90% relative humidity). We believe the low-temperature curable thin adhesive layer will serve as a powerful material for the lamination of organic electronic devices in damage-free way.","PeriodicalId":93348,"journal":{"name":"Organic Materials","volume":"5 1","pages":"66 - 71"},"PeriodicalIF":0.0,"publicationDate":"2022-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45862709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Laisuo Su, Shwetha Sunil Kumar, A. Manthiram, B. Reeja‐Jayan
Since the very first patent on poly(3,4-ethylenedioxythiophene) (PEDOT) that was filed in 1988, this polymer has been widely utilized and has achieved great success owing to its high electrical conductivity and excellent stability. The application of the conducting polymer, PEDOT, in renewable energy devices, especially rechargeable batteries, is attracting increasing attention due to its potential to solve the energy and climate crisis. In this review, we summarize the research over the past few decades directed toward the application of PEDOT in rechargeable batteries aimed at improving their electrochemical performance. We focus on PEDOT synthesized via oxidative chemical vapor deposition (oCVD), a relatively new process known for its ability to grow conducting polymer thin films with uniform, pinhole-free properties, and controllable thickness and conformality. For a comparison purpose, PEDOT synthesized via solution-based methods is also briefly summarized. Finally, future research directions for applying oCVD PEDOT in rechargeable batteries are discussed.
{"title":"A Review on Application of Poly(3,4-ethylenedioxythiophene) (PEDOT) in Rechargeable Batteries","authors":"Laisuo Su, Shwetha Sunil Kumar, A. Manthiram, B. Reeja‐Jayan","doi":"10.1055/a-1990-3149","DOIUrl":"https://doi.org/10.1055/a-1990-3149","url":null,"abstract":"Since the very first patent on poly(3,4-ethylenedioxythiophene) (PEDOT) that was filed in 1988, this polymer has been widely utilized and has achieved great success owing to its high electrical conductivity and excellent stability. The application of the conducting polymer, PEDOT, in renewable energy devices, especially rechargeable batteries, is attracting increasing attention due to its potential to solve the energy and climate crisis. In this review, we summarize the research over the past few decades directed toward the application of PEDOT in rechargeable batteries aimed at improving their electrochemical performance. We focus on PEDOT synthesized via oxidative chemical vapor deposition (oCVD), a relatively new process known for its ability to grow conducting polymer thin films with uniform, pinhole-free properties, and controllable thickness and conformality. For a comparison purpose, PEDOT synthesized via solution-based methods is also briefly summarized. Finally, future research directions for applying oCVD PEDOT in rechargeable batteries are discussed.","PeriodicalId":93348,"journal":{"name":"Organic Materials","volume":"4 1","pages":"292 - 300"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49669866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tom Fleck-Kunde, Emma H. Wolpert, LauraHorst zur zur, Robert Oestreich, C. Janiak, K. Jelfs, Bernd M. Schmidt
The first synthesis of an organic Tri6Di9 cage is presented. Two structurally distinct Tri6Di9 cages were synthesised by combining a highly fluorinated aldehyde with two ditopic amines. Although the pure compound could not be isolated despite many attempts, the information obtained is critical for the future design of large supramolecular structures. Computational and experimental methods indicate that the addition of perfluorinated aromatic linkers in the assembly of porous organic cages opens up new possibilities for influencing the reaction pathway towards rare and unknown structures.
{"title":"Observation of Rare Tri 6 Di 9 Imine Cages Using Highly Fluorinated Building Blocks","authors":"Tom Fleck-Kunde, Emma H. Wolpert, LauraHorst zur zur, Robert Oestreich, C. Janiak, K. Jelfs, Bernd M. Schmidt","doi":"10.1055/a-1977-1765","DOIUrl":"https://doi.org/10.1055/a-1977-1765","url":null,"abstract":"The first synthesis of an organic Tri6Di9 cage is presented. Two structurally distinct Tri6Di9 cages were synthesised by combining a highly fluorinated aldehyde with two ditopic amines. Although the pure compound could not be isolated despite many attempts, the information obtained is critical for the future design of large supramolecular structures. Computational and experimental methods indicate that the addition of perfluorinated aromatic linkers in the assembly of porous organic cages opens up new possibilities for influencing the reaction pathway towards rare and unknown structures.","PeriodicalId":93348,"journal":{"name":"Organic Materials","volume":"4 1","pages":"255 - 260"},"PeriodicalIF":0.0,"publicationDate":"2022-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49372645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Himanshu Sharma, A. Ankita, Pooja Bhardwaj, U. K. Pandey, Soumyajit Das
Unsymmetrically disubstituted antiaromatic indenofluorene (IF), in comparison to aromatic pentacene counterpart with unsymmetrical disubstitution, was rare in literature until our recent report on indeno[1,2-b]fluorene and indeno[2,1-a]fluorene. Described herein is straightforward access to unsymmetrically disubstituted indeno[2,1-c]fluorenes bearing mesityl at one apical carbon and C6F5, 3,5-(CF3)2C6H3, and CCSii-Pr3 at the other apical carbon, including 4-methoxyphenyl/3,5-(CF3)2C6H3 push/pull substitution at the apical carbons with appreciable orbital density and a previously unknown symmetrically C6F5-disubstituted [2,1-c]IF. The electronic properties of the unsymmetrical derivatives lie halfway in between the two symmetrical counterparts, while the 4-methoxyphenyl derivative showed the smallest HOMO-LUMO energy gap and near-infrared absorption with intramolecular charge transfer character. Single-crystal analyses showed 1D-columnar stacks for the unsymmetrical motif with the C6F5 units co-facially π-stacked with the IF core, whereas symmetrically C6F5-disubstituted [2,1-c]IF, with a low-lying LUMO, showed intermolecular π-π stacks between the IFs core that resulted in good electron mobility (μe = 8.66 × 10−3 cm2 V−1 s−1) under space charge limited current measurements. Importantly, balanced ambipolar charge-transport behaviour could be extracted for an IF series with symmetrical/unsymmetrical substitutions, in comparison to its π-contracted pentalene congener.
{"title":"Exploring Indeno[2,1- c ]fluorene Antiaromatics with Unsymmetrical Disubstitution and Balanced Ambipolar Charge-Transport Properties","authors":"Himanshu Sharma, A. Ankita, Pooja Bhardwaj, U. K. Pandey, Soumyajit Das","doi":"10.1055/a-2020-0308","DOIUrl":"https://doi.org/10.1055/a-2020-0308","url":null,"abstract":"Unsymmetrically disubstituted antiaromatic indenofluorene (IF), in comparison to aromatic pentacene counterpart with unsymmetrical disubstitution, was rare in literature until our recent report on indeno[1,2-b]fluorene and indeno[2,1-a]fluorene. Described herein is straightforward access to unsymmetrically disubstituted indeno[2,1-c]fluorenes bearing mesityl at one apical carbon and C6F5, 3,5-(CF3)2C6H3, and CCSii-Pr3 at the other apical carbon, including 4-methoxyphenyl/3,5-(CF3)2C6H3 push/pull substitution at the apical carbons with appreciable orbital density and a previously unknown symmetrically C6F5-disubstituted [2,1-c]IF. The electronic properties of the unsymmetrical derivatives lie halfway in between the two symmetrical counterparts, while the 4-methoxyphenyl derivative showed the smallest HOMO-LUMO energy gap and near-infrared absorption with intramolecular charge transfer character. Single-crystal analyses showed 1D-columnar stacks for the unsymmetrical motif with the C6F5 units co-facially π-stacked with the IF core, whereas symmetrically C6F5-disubstituted [2,1-c]IF, with a low-lying LUMO, showed intermolecular π-π stacks between the IFs core that resulted in good electron mobility (μe = 8.66 × 10−3 cm2 V−1 s−1) under space charge limited current measurements. Importantly, balanced ambipolar charge-transport behaviour could be extracted for an IF series with symmetrical/unsymmetrical substitutions, in comparison to its π-contracted pentalene congener.","PeriodicalId":93348,"journal":{"name":"Organic Materials","volume":"5 1","pages":"72 - 83"},"PeriodicalIF":0.0,"publicationDate":"2022-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48545270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ke Tian, Xubin Wang, Moritz Schuldt, Sven M. Elbert, F. Rominger, M. Mastalerz
Organic imine cage compounds have found a variety of different applications in several fields in materials science. To design tailor made cages for corresponding applications, synthetic approaches to cages with tunable functionalities, sizes and shapes have to be found. Here we report a series of cages with truncated cubic shape and tetrahedral geometry possessing nitrogen-rich cavities
{"title":"[4 + 4]-Imine Cage Compounds with Nitrogen-Rich Cavities and Tetrahedral Geometry","authors":"Ke Tian, Xubin Wang, Moritz Schuldt, Sven M. Elbert, F. Rominger, M. Mastalerz","doi":"10.1055/a-2041-5362","DOIUrl":"https://doi.org/10.1055/a-2041-5362","url":null,"abstract":"Organic imine cage compounds have found a variety of different applications in several fields in materials science. To design tailor made cages for corresponding applications, synthetic approaches to cages with tunable functionalities, sizes and shapes have to be found. Here we report a series of cages with truncated cubic shape and tetrahedral geometry possessing nitrogen-rich cavities","PeriodicalId":93348,"journal":{"name":"Organic Materials","volume":"5 1","pages":"91 - 97"},"PeriodicalIF":0.0,"publicationDate":"2022-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47126031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Photoinitiating systems (PISs) are key components in photoc- urable formulations (inks) for three-dimensional (3D) printing. Natural PISs are promising and more environmentally friendly alternatives to conventional photoinitiators. These systems offer enhanced features such as less toxicity and therefore, higher biocompatibility. Further- more, they can be found in a large “ color palette ” variety (absorbing in the different regions of the UV-visible spectrum) enabling new possibil- ities in the field of 3Dprinting. In this review, we outline the current efforts to implement natural and naturally derived PISs in light-based 3Dprinting. First, recently applied natural PISs and their performance for light-based 3Dprinting are discussed. In a second part, an overview of naturally derived PISs including the most common synthetic strategies are provided. Last, current challenges as well as future perspec- tives of the field are discussed.
{"title":"Natural and Naturally Derived Photoinitiating Systems for Light-Based 3D Printing","authors":"Clara Vazquez-Martel, Philipp Mainik, E. Blasco","doi":"10.1055/a-1976-0453","DOIUrl":"https://doi.org/10.1055/a-1976-0453","url":null,"abstract":"Photoinitiating systems (PISs) are key components in photoc- urable formulations (inks) for three-dimensional (3D) printing. Natural PISs are promising and more environmentally friendly alternatives to conventional photoinitiators. These systems offer enhanced features such as less toxicity and therefore, higher biocompatibility. Further- more, they can be found in a large “ color palette ” variety (absorbing in the different regions of the UV-visible spectrum) enabling new possibil- ities in the field of 3Dprinting. In this review, we outline the current efforts to implement natural and naturally derived PISs in light-based 3Dprinting. First, recently applied natural PISs and their performance for light-based 3Dprinting are discussed. In a second part, an overview of naturally derived PISs including the most common synthetic strategies are provided. Last, current challenges as well as future perspec- tives of the field are discussed.","PeriodicalId":93348,"journal":{"name":"Organic Materials","volume":"4 1","pages":"281 - 291"},"PeriodicalIF":0.0,"publicationDate":"2022-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42808669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Rossignon, Beatrice Berionni Berna, A. Parola, C. Laia, D. Bonifazi
A series of novel O-doped polycyclic aromatic hydrocarbons (PAHs), bearing a different number of electron donating alkoxy substituents, has been prepared using a novel copper-promoted anaerobic protocol for the cyclisation of highly electron rich peri-xanthenoxanthene (PXX) molecular modules. The effect of the number and position of the alkoxy substituents on the optoelectronic properties has thus been investigated, unveiling p-type semiconducting properties. All molecules displayed a significant colour change upon oxidation, suggesting that these compounds can be used to devise chromogenic materials to engineer electrochromic devices.
{"title":"HOMO Energy-Level Lifting in p-Type O-Doped Graphenoids: Synthesis of Electrochromic Alkoxy-Decorated Xanthenoxanthenes","authors":"A. Rossignon, Beatrice Berionni Berna, A. Parola, C. Laia, D. Bonifazi","doi":"10.1055/a-1976-0291","DOIUrl":"https://doi.org/10.1055/a-1976-0291","url":null,"abstract":"A series of novel O-doped polycyclic aromatic hydrocarbons (PAHs), bearing a different number of electron donating alkoxy substituents, has been prepared using a novel copper-promoted anaerobic protocol for the cyclisation of highly electron rich peri-xanthenoxanthene (PXX) molecular modules. The effect of the number and position of the alkoxy substituents on the optoelectronic properties has thus been investigated, unveiling p-type semiconducting properties. All molecules displayed a significant colour change upon oxidation, suggesting that these compounds can be used to devise chromogenic materials to engineer electrochromic devices.","PeriodicalId":93348,"journal":{"name":"Organic Materials","volume":"4 1","pages":"240 - 254"},"PeriodicalIF":0.0,"publicationDate":"2022-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44865409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sashi Debnath, G. Masilamani, Abhijeet R. Agrawal, N. R. Kumar, C. Kumar, Sanjio S. Zade, Anjan Bedi
Cyclopenta[c]thiophene (CPT)-based polymers are potential candidates in organic electronics. Here, we report the first solution-processable red homopolymer (P1) of a thiophene-capped derivative of CPT (DHTCPT), and a blue homopolymer (P2) of N-substituted thienodiketopyrrolopyrrole (DEHTDPP). Additionally, by alternatingly copolymerizing the DHTCPT and DEHTDPP units, we achieved the green copolymer P3, thus completing the red-green-blue color wheels. We have shown experimentally and computationally (time-dependent density functional theory and natural bond orbital calculations) that P1 and P2 have very different optoelectronic features. However, in a donor–acceptor (D–A) copolymer P3, the optoelectronic properties have been tuned significantly to keep it in an intermediate range of P1 and P2. P2 and P3 absorb throughout the whole UV-vis range of the solar spectrum. Furthermore, all polymers showed electrochromism to switch colors between neutral and polaronic states in solution. For P1, the maximum optical contrast (%ΔT) was observed for the SOMO→LUMO transition, whereas P3 displayed the maximum %ΔT at the HOMO→LUMO transition.
{"title":"Cyclopenta[ c ]thiophene- and Diketopyrrolopyrrole-Based Red-Green-Blue Electrochromic Polymers","authors":"Sashi Debnath, G. Masilamani, Abhijeet R. Agrawal, N. R. Kumar, C. Kumar, Sanjio S. Zade, Anjan Bedi","doi":"10.1055/s-0042-1757979","DOIUrl":"https://doi.org/10.1055/s-0042-1757979","url":null,"abstract":"Cyclopenta[c]thiophene (CPT)-based polymers are potential candidates in organic electronics. Here, we report the first solution-processable red homopolymer (P1) of a thiophene-capped derivative of CPT (DHTCPT), and a blue homopolymer (P2) of N-substituted thienodiketopyrrolopyrrole (DEHTDPP). Additionally, by alternatingly copolymerizing the DHTCPT and DEHTDPP units, we achieved the green copolymer P3, thus completing the red-green-blue color wheels. We have shown experimentally and computationally (time-dependent density functional theory and natural bond orbital calculations) that P1 and P2 have very different optoelectronic features. However, in a donor–acceptor (D–A) copolymer P3, the optoelectronic properties have been tuned significantly to keep it in an intermediate range of P1 and P2. P2 and P3 absorb throughout the whole UV-vis range of the solar spectrum. Furthermore, all polymers showed electrochromism to switch colors between neutral and polaronic states in solution. For P1, the maximum optical contrast (%ΔT) was observed for the SOMO→LUMO transition, whereas P3 displayed the maximum %ΔT at the HOMO→LUMO transition.","PeriodicalId":93348,"journal":{"name":"Organic Materials","volume":"4 1","pages":"268 - 276"},"PeriodicalIF":0.0,"publicationDate":"2022-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48430846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sanjay Kumar Swami, Bidyut B. Barman, Anuj Kumar, V. Dutta
In this work, the fabrication of multilayered transparent conductive oxides (TCOs), ZnO–Ag–ZnO (Z-TCO) and AZO–Ag–AZO (AZ-TCO), on flexible polyethylene terephthalate (PET) substrate using radio frequency (RF) magnetron sputtering is reported, with the optical and electrical properties comparable to those of the commercially available Sn-doped indium oxide (ITO) on the PET substrate. The growth of Z-TCO and AZ-TCO layers on PET (with surface roughness ~5 – 7 nm) shows similar surface characteristics to that on the glass substrate. The multilayered Z-TCO and AZ-TCO (total thickness ~70 nm) with 10 nm of Ag thickness (named Z-2 and AZ-2, respectively) exhibit a maximum transparency of 82.7% and 86.4%, at 515 and 498 nm, respectively. The AZ-2 layer has a lower electrical resistivity of 3.92 × 10−5 Ω cm with a lower sheet resistance of 5.6 Ω/sq, whereas for ITO on PET these values are 2.62 × 10−4 Ω cm and 14.5 Ω/sq, respectively. The AZ-2 layer also gives an excellent figure of merit (FoM) of 21.3 × 10−3 Ω−1, which is better than the FoM for ITO PET (17.3 × 10−3 Ω−1). Therefore, the flexible multilayer TCOs prepared using RF magnetron sputtering on PET substrates on a large area can have better optoelectronic properties than commercial flexible ITO coating and can be used in flexible optoelectronic devices.
{"title":"Multilayer and Thin Transparent Conducting Oxide Fabrication Using RF Magnetron Sputtering on Flexible Substrates","authors":"Sanjay Kumar Swami, Bidyut B. Barman, Anuj Kumar, V. Dutta","doi":"10.1055/s-0042-1757982","DOIUrl":"https://doi.org/10.1055/s-0042-1757982","url":null,"abstract":"In this work, the fabrication of multilayered transparent conductive oxides (TCOs), ZnO–Ag–ZnO (Z-TCO) and AZO–Ag–AZO (AZ-TCO), on flexible polyethylene terephthalate (PET) substrate using radio frequency (RF) magnetron sputtering is reported, with the optical and electrical properties comparable to those of the commercially available Sn-doped indium oxide (ITO) on the PET substrate. The growth of Z-TCO and AZ-TCO layers on PET (with surface roughness ~5 – 7 nm) shows similar surface characteristics to that on the glass substrate. The multilayered Z-TCO and AZ-TCO (total thickness ~70 nm) with 10 nm of Ag thickness (named Z-2 and AZ-2, respectively) exhibit a maximum transparency of 82.7% and 86.4%, at 515 and 498 nm, respectively. The AZ-2 layer has a lower electrical resistivity of 3.92 × 10−5 Ω cm with a lower sheet resistance of 5.6 Ω/sq, whereas for ITO on PET these values are 2.62 × 10−4 Ω cm and 14.5 Ω/sq, respectively. The AZ-2 layer also gives an excellent figure of merit (FoM) of 21.3 × 10−3 Ω−1, which is better than the FoM for ITO PET (17.3 × 10−3 Ω−1). Therefore, the flexible multilayer TCOs prepared using RF magnetron sputtering on PET substrates on a large area can have better optoelectronic properties than commercial flexible ITO coating and can be used in flexible optoelectronic devices.","PeriodicalId":93348,"journal":{"name":"Organic Materials","volume":"5 1","pages":"59 - 65"},"PeriodicalIF":0.0,"publicationDate":"2022-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42905331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Crystal engineering have served as a powerful strategy to grow organic molecular crystals with different physical behaviors and this strategy has been also attempted for a purpose to grow crystals with desired mechanical properties, however, it is quite challenging to endow all different crystal phases constructed by the same compound with unique reversible deformation, such as elastic bending. We herein report a rare example of all-polymorph elastic crystals accompanied with precisely tunable emission colors. Single crystal structure analyses, optical and mechanical properties have been fully investigated on all polymorphs. The color-tunable amplified spontaneous emissions of both the straight and elastically bent polymorphs demonstrate the applications of these elastic polymorphs in future wearable optoelectronic devices.
{"title":"Emission-Tunable and Elastically Bendable Organic Polymorphs for Lasing Media","authors":"Baolei Tang, Shiyue Tang, K. Ye, Hongyu Zhang","doi":"10.1055/a-1954-3823","DOIUrl":"https://doi.org/10.1055/a-1954-3823","url":null,"abstract":"Crystal engineering have served as a powerful strategy to grow organic molecular crystals with different physical behaviors and this strategy has been also attempted for a purpose to grow crystals with desired mechanical properties, however, it is quite challenging to endow all different crystal phases constructed by the same compound with unique reversible deformation, such as elastic bending. We herein report a rare example of all-polymorph elastic crystals accompanied with precisely tunable emission colors. Single crystal structure analyses, optical and mechanical properties have been fully investigated on all polymorphs. The color-tunable amplified spontaneous emissions of both the straight and elastically bent polymorphs demonstrate the applications of these elastic polymorphs in future wearable optoelectronic devices.","PeriodicalId":93348,"journal":{"name":"Organic Materials","volume":"4 1","pages":"216 - 221"},"PeriodicalIF":0.0,"publicationDate":"2022-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48999927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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