Materials Literature
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Here, we report significant improvements of Voc and FF in Sb2S3 quantum dot (QD)-based, solid-state heterojunction solar cells prepared from the solid transfer of preformed PEDOT:PSS hole extraction layers. Despite the moderate optical properties of Sb2S3 QDs, the solid state QD solar cells suffer from poor power conv…
Small molecules TPASi-OH, TPAB, comprising the same moeity TPA (Triphenylamine) and different trimethylsilane and fluorodimesitylborane were designed and synthesized as hole-transporting materials in organic solar cells. The triphenylamine based derivative TPASi-OH and TPAB exhibited a short-circuit current density (J…
Endüstride geniş kullanım alanına sahip tabakalı kompozit malzemeler, kullanıldıkları alanlara bağlı olarak tekrarlı yüklere maruz kalabilmektedirler. Bu nedenle malzemelerin tekrarlı yüklere karşı dayanımı önemli bir parametredir. İzotropik malzemelerden farklı olarak kompozit malzemelerin yorulma davranışlarının tes…
본 연구에서는 접착제로 체결된 구조물의 접착 조인트에서의 파괴인성을 조사하기 위하여 알루미늄 폼으로 제작한 Mode III 형 DCB 시험편들에 대하여 정적 해석 및 실험을 수행하였다. 정적 해석에서의 경우, 각 시험편 모델들은 강제 변위가 약 5 mm 진행되었을 때 최대 반력을 보였으며, 이 때 각 시험편 모델들의 최대 반력은 두께가 35 mm인 모델이 약 0.25 kN, 두께가 45 mm인 모델이 약 0.28 kN, 두께가 55 mm인 모델이 약 0.5 kN으로나타났다. 이 해석 결과들을 입증하기 위하여 정적 실험의 경우에서 두 개의 시험편들을 택하였다. 정적…
Recently, hydrogen fuel cell vehicles are rolling out using proton exchange membrane fuel cells. But high cost of fuel cell stack still retards commercialization in most markets. Alkaline anion exchange membrane fuel cells meets the challenges facing proton exchange membrane fuel cells like high cost and corrosion pro…
Self-healing polymers (SHPs) can repair damage (scratches, cracks) on the application of a stimulus, and provide extended application lifetime and reduced maintenance cost. One approach to prepare SHPs is the use of dynamic interactions, which may be supramolecular (hydrogen bonding, ionic interactions, π-π stacking,…
International audience
It is mightily important to design and fabricate highly active and durable oxygen reduction reaction (ORR) catalysts for the application of proton exchange membrane fuel cells. The use of Pt catalysts is severely limited because of high cost and limited resources. Accordingly, the design of novel catalysts requires no…
Three different new hole transport compounds, namely DPAP-TB, 1-PNAP-TB and 2-PNAP-TB, were synthesized by Sonogashira coupling and Diels-Alder reaction. Synthesized materials exhibited high Tg in the range of 118 to 133°C. These values are higher than that of NPB, which is commonly used as a hole transporting materia…
화석연료의 사용량 증가로 인한 CO2발생량의 증가로 인하여 지구온난화와 기후변화로 기인된 자연폐해가 가속화 됨에 따라 전세계적으로 CO2 저감 및 활용을 위한 연구개발에 많은 투자가 이루어지고 있다. 많은 관련 기술 중 가시광을 이용 CO2 환원반응을 유도를 위한 방법으로 태양빛을 이용한 청정공정연구가 각광받고 있는 상황이며 이에 본 연구에서는 TiO2에 유기염료인 DMOM과 Ni-Cyclam 유도체를 접합시킨 새로운 Triad-hybrid구조(Dye/TiO2/ReC)를 통하여 효율적인 공정시스템을 구현하고자 하였다. 우선적으로 효과적인 환원촉매인 Ni-Cyclam…
Filter module systems can be used for waste water treatment, recovery of fibers, filtration of metallic salt solutions and so on. Suport tray materials are wood, metal and rubber. These elements are showing a lot of disadventages as for example corrosion resistance and bad sealing. However Polypropylene turned out to…
The most common structure of the current transformer (CT) consists of a length of wire wrapped many times around a silicon steel ring passed over the circuit being measured. Therefore, the primary circuit of CT consists of a single turn of the conductor, with a secondary circuit of many tens or hundreds of turns. The…
Few-layer graphene sheets were successfully separated from graphite with the different amounts of polyaniline (PANI) in an organic solvent. A simple sonication process allowed the dispersion of graphene sheets with PANI glues, demonstrating the capability of the PANI glues as the efficient intercalant. The PANI glues…
D-(π)n-A-type copolymers with different thienyl spacers between akylidenefluorene and isoindigo were synthesized via a Suzuki coupling reaction. As the spacer increased from a polymer (P1), the UV-Vis absorption maximum red- shifted, and the band gap decreased from 1.83 to 1.64 eV. The HOMO levels of the polymers were…
MnOx-CeO2-WO3/TiO2 catalysts with different W/Ce ratio were synthesized by the sol-gel method for selective catalytic reduction (SCR) of NOx by NH3 reductant at low-temperatures. The X-ray diffraction (XRD) patterns show that all samples were anatase TiO2 phase, indicating that MnOx, CeO2, and WO3 were well-dispersed…
In this study ensuring a filming technology is attempted through dispersion technologies and mixing polymer scaffolds in order to produce films based on the nanowaires obtained from chitin. In addition this study proposes technologies in measuring and improving characteristics of films produced using nanowires and for…
In recent years, electrochemical supercapacitors have aroused wide advantages due to strong demand for flexible, portable, and lightweight energy devices. Supercapacitors are promising power source for automotive applications, have many advantages compared to traditional capacitors and secondary batteries such as high…
Poly(lactide) (PLA) stereocomplexes, formed by the mixing of two enantiomers poly(L-lactide) and poly(D-lactide), have many favorable characteristics. The stereocomplex showed a 50°C higher melting point than that of each enantiomeric polymer. The resistance toward hydrolytic degradation was increased. In this study,…
In this article theoretical models and some existing data sets were examined in order to model the two main causes (hydrogen embrittlement and corrosion-cracking under stress) of the called environmentally assisted cracking phenomenon (EAC). Additionally, a computer simulation of flat metal plate subject to mechanical…
Divinylbenzene cross-linked polystyrene is the polymer of choice for use solid-phase organic synthesis. In an attempt to overcome the shortcomings of divinylbenzene cross-linked polystyrene and to synthesize polymers with optimum properties for use in organic synthesis. we have examined the utility of our resins in sy…