Ring Opening of Naphthenic Molecules Over Metal Containing Mesoporous Y Zeolite Catalyst

Lee, You Jin; Kim, Eun Sang; Kim, Tae Wan; Kim, Chul Ung; Jeong, Kwang Eun; Lee, Chang Ha; Jeong, Soon Yong

doi:10.1166/jnn.2015.10424

Cited by 8 publications

(5 citation statements)

References 6 publications

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“…The dependence of device performances based on the PM6:Y6 active layer on ETLs thicknesses were investigated by changing the solution concentration of the CPEs during spin-coating. Differ from PFN-Br, [22,30,50] whose photovoltaic performances decline rapidly as the film thickness increase, the devices based on PIIDNDI-Br and PDPPNDI-Br displayed good tolerance to thicker films. It seems PDPPNDI-Br possesses excellent thickness tolerance with a high PCE of 15% maintained at a thickness of 45 nm and a PCE of 11% at an even thicker ETL layer of 100 nm for its corresponding devices, and the photovoltaic parameters are summarized in Table S2 (Supporting Information).…”

Section: Photovoltaic Propertiesmentioning

confidence: 97%

Doped/Undoped A1‐A2 Typed Copolymers as ETLs for Highly Efficient Organic Solar Cells

Yang

Shen

Chen

et al. 2023

Adv Funct Materials

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The electron transport layer (ETL) is a critical component in achieving high device performance and stability in organic solar cells. Conjugated polyelectrolytes (CPEs) have become an attractive alternative due to film‐forming properties and ease of preparation. However, p‐type CPEs generally exhibit poor charge mobility and conductivity, incorporation of electron‐withdrawing units forming alternated D‐A conjugated backbone can make up for these deficiencies. Herein, the ratio of electron withdrawing moieties are further increased and two poly(A1‐alt‐A2) typed PIIDNDI‐Br and PDPPNDI‐Br based on the combination of naphthalene diimide (NDI) with isoindigo (IID) or diketopyrrolopyrrole (DPP) via direct arylation polycondensation are synthesized. These CPEs possess excellent alcohol solubility, a suitable lowest unocuppied molecular orbital energy level, and work function tunability. Surprisingly, the incorporation of IID and DPP units generate distinct self‐doping behaviors, which are confirmed by UV–vis absorption and ESR spectra. However, no matter doped or undoped, both CPEs present better charge‐transporting properties and conductivity when utilized as ETLs. The PIIDNDI‐Br and PDPPNDI‐Br display good universal compatibility with the blend of PM6:Y6 and PM6:L8‐BO, and PCEs of 18.32% and 18.36% are obtained, respectively, which also present excellent storage stability. In short, the combination of two different acceptors demonstrates an efficient strategy to design highly efficient ETLs for high performance photovoltaic devices.

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Section: Photovoltaic Propertiesmentioning

confidence: 97%

Doped/Undoped A1‐A2 Typed Copolymers as ETLs for Highly Efficient Organic Solar Cells

Yang

Shen

Chen

et al. 2023

Adv Funct Materials

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“…The calcined HY zeolite showed a relative distribution ratio of weak/strong acid sites of 1 and for the monometallic catalysts of Pt (Pd0Pt100/HY) and Pd (Pd100Pt0/HY) of 6 and 3, respectively. The bimetallic catalyst Pd33Pt67/HY exhibited a weak/strong acidity ratio of 2 [23], [26], [27].…”

Section: Catalysts Characterizationmentioning

confidence: 99%

Toluene hydrogenation and ring-opening on bimetallic Pd-Pt/HY catalysts

et al. 2023

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Bimetallic Pd-Pt/HY catalysts prepared by the co-impregnation method with an atomic variation of Pd/Pd+Pt were studied to convert toluene and methylcyclohexane. The catalysts were characterized by the BET method, chemisorption of CO by the pulse method, programmed temperature reduction (H2-TPR), and programmed ammonia thermo-desorption (NH3TPD). Results of chemisorption of CO and H2-TPR for Pd-Pt/HY catalysts suggest the existence of a strong interaction between Pd and Pt. The NH3-TPD showed that incorporating metals influences the percentage of relative distribution of weak/strong acid sites presented in decreasing order of acidity: Pd0Pt100/HY>Pd100Pt0/HY>Pd33Pt67/HY. Atomic composition Pd/Pd+Pt equal to 0.33, and relative distribution of weak/strong acid sites equal to 2, favor hydrogenation of toluene to methylcyclohexane in metal sites and subsequent skeletal isomerization in the acidic sites through dimethylcyclopentane intermediate and ring-opening in the metal sites, leading to increased formation of n-heptane relative to iso-heptane. Bimetallic Pd-Pt/HY catalysts prepared by the co-impregnation method with an atomic variation of Pd/Pd+Pt were studied to convert toluene and methylcyclohexane. The catalysts were characterized by the BET method, chemisorption of CO by the pulse method, programmed temperature reduction (H2-TPR), and programmed ammonia thermo-desorption (NH3TPD). Results of chemisorption of CO and H2-TPR for Pd-Pt/HY catalysts suggest the existence of a strong interaction between Pd and Pt. The NH3-TPD showed that incorporating metals influences the percentage of relative distribution of weak/strong acid sites presented in decreasing order of acidity: Pd0Pt100/HY>Pd100Pt0/HY>Pd33Pt67/HY. Atomic composition Pd/Pd+Pt equal to 0.33, and relative distribution of weak/strong acid sites equal to 2, favor hydrogenation of toluene to methylcyclohexane in metal sites and subsequent skeletal isomerization in the acidic sites through dimethylcyclopentane intermediate and ring-opening in the metal sites, leading to increased formation of n-heptane relative to iso-heptane.

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“…[44][45][46] The rigid polymers consisting of multiple fused rings require long and/or branched side chains to enable not only their processing in solution but also sufficient time to construct well-ordered packing structures through polymer self-assembly during solution processing. [47] For example, Gao et al adjusted the side chain structures of diketopyrrolopyrrole (DPP)-based polymers for use in organic field-effect transistors (OFETs), where the polymer with the optimized side chains exhibited improved crystallinity and μ value, compared to those with shorter side chains. [48] 3) At the same time, the length of side chains should be delicately controlled so as not to be excessively elongated, thereby maintaining the preaggregated state of polymers in solution and, in turn, forming large crystalline domains in film.…”

Section: Introductionmentioning

confidence: 99%

High‐Performance Organic Electrochemical Transistors Achieved by Optimizing Structural and Energetic Ordering of Diketopyrrolopyrrole‐Based Polymers

Jo,

Jeong,

Moon

et al. 2023

Advanced Materials

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For optimizing steady‐state performance in organic electrochemical transistors (OECTs), both molecular design and structural alignment approaches must work in tandem to minimize energetic and microstructural disorders in polymeric mixed ionic–electronic conductor films. Herein, a series of poly(diketopyrrolopyrrole)s bearing various lengths of aliphatic–glycol hybrid side chains (PDPP‐mEG; m = 2–5) is developed to achieve high‐performance p‐type OECTs. PDPP‐4EG polymer with the optimized length of side chains exhibits excellent crystallinity owing to enhanced lamellar and backbone interactions. Furthermore, the improved structural ordering in PDPP‐4EG films significantly decreases trap state density and energetic disorder. Consequently, PDPP‐4EG‐based OECT devices produce a mobility–volumetric capacitance product ([µC*]) of 702 F V−1 cm−1 s−1 and a hole mobility of 6.49 ± 0.60 cm2 V−1 s−1. Finally, for achieving the optimal structural ordering along the OECT channel direction, a floating film transfer method is employed to reinforce the unidirectional orientation of polymer chains, leading to a substantially increased figure‐of‐merit [µC*] to over 800 F V−1 cm−1 s−1. The research demonstrates the importance of side chain engineering of polymeric mixed ionic–electronic conductors in conjunction with their anisotropic microstructural optimization to maximize OECT characteristics.

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Ring Opening of Naphthenic Molecules Over Metal Containing Mesoporous Y Zeolite Catalyst

Cited by 8 publications

References 6 publications

Doped/Undoped A1‐A2 Typed Copolymers as ETLs for Highly Efficient Organic Solar Cells

Doped/Undoped A1‐A2 Typed Copolymers as ETLs for Highly Efficient Organic Solar Cells

Toluene hydrogenation and ring-opening on bimetallic Pd-Pt/HY catalysts

High‐Performance Organic Electrochemical Transistors Achieved by Optimizing Structural and Energetic Ordering of Diketopyrrolopyrrole‐Based Polymers

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