scholarly journals On the energy gap determination of organic optoelectronic materials: the case of porphyrin derivatives

2022 ◽  
Author(s):  
Rian Esteves Aderne ◽  
Bruno Gabriel Alves Leite Borges ◽  
Harold Jose Camargo Avila ◽  
Fredrik von Kieseritzky ◽  
Jonas Hellberg ◽  
...  
Keyword(s):  
Ionization Potential ◽  
Electron Affinity ◽  
Energy Gap ◽  
Optoelectronic Materials ◽  
Porphyrin Derivatives ◽  
Correct Determination ◽  
Organic Optoelectronic

A correct determination of the ionization potential (IP) and electron affinity (EA) as wells as the energy gap is essential to properly characterize a series of key phenomena related to...

Electrochemical determination of the ionization potential and electron affinity of poly(9,9-dioctylfluorene)

1998 ◽  
Vol 73 (17) ◽  
pp. 2453-2455 ◽  
Author(s):  
S. Janietz ◽  
D. D. C. Bradley ◽  
M. Grell ◽  
C. Giebeler ◽  
M. Inbasekaran ◽  
...  
Keyword(s):  
Ionization Potential ◽  
Electron Affinity ◽  
Electrochemical Determination

Novel soluble blue emitting PPV-like polymers: synthesis and characterization

e-Polymers ◽  
2003 ◽  
Vol 3 (1) ◽  
Author(s):  
Jonas Gruber ◽  
Rosamaria W. C. Li ◽  
Patricia Ponce ◽  
Adriano R. V. Benvenho ◽  
Regina M. Q. Mello ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Energy Level ◽  
Ionization Potential ◽  
Electron Affinity ◽  
Electrochemical Synthesis ◽  
Energy Gap ◽  
Thermal Characterization ◽  
Synthesis And Characterization ◽  
Optical Energy Gap ◽  
Homo Energy Level

Abstract We report on the electrochemical synthesis of two novel soluble PPV-like polymers, poly(2-decyloxy-4,4'-biphenylenevinylene), DOPBV, and poly(2-decylsulfonyl- 4,4'-biphenylenevinylene), DSPBV, their spectroscopic and thermal characterization as well as their electrical properties. We also report on the use of sandwich devices Au/DOPBV/Al and Ni/DSPBV/Al to investigate the charge injection and transport characteristics, besides other important parameters such as the optical energy gap and the HOMO energy level, leading to an estimate of the ionization potential and electron affinity of these polymers.

scholarly journals Manufacturing PLA/PCL Blends by Ultrasonic Molding Technology

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2412
Author(s):  
Inés Ferrer ◽  
Ariadna Manresa ◽  
José Alberto Méndez ◽  
Marc Delgado-Aguilar ◽  
Maria Luisa Garcia-Romeu
Keyword(s):  
Molecular Weight ◽  
Crystallization Rate ◽  
Raw Material ◽  
Small Particle Size ◽  
Polymer Mixtures ◽  
Crystallinity Degree ◽  
Correct Determination ◽  
Production Stages ◽  
Process Speed

Ultrasonic molding (USM) is a good candidate for studying the plasticization of polymer mixtures or other composite materials due to either the little amount of material needed for processing, low waste or the needed low pressure and residence time of the mold. Thus, the novelty of this research is the capability of USM technology to process PLA/PCL blends and their corresponding neat materials, encompassing all the production stages, from raw material to the final specimen. The major findings of the work revealed that the thermal properties of the blends were not affected by the USM process, although the crystallinity degree experienced variations, decreasing for PLA and increasing for PCL, which was attributed to the crystallization rate of each polymer, the high process speed, the short cooling time and the small particle size. The employed ultrasonic energy increased the molecular weight with low variations through the specimen. However, the degradation results aligned with the expected trend of these material blends. Moreover, this study also showed the effect pellet shape and dimensions have over the process parameters, as well as the effect of the blend composition. It can be concluded that USM is a technology suitable to successfully process PLA/PCL blends with the correct determination of process parameter windows.

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