Characteristics and Hole Transporting Properties of Cyclic Oligomers Consisting of 4-Octyltriphenylamine
Source abstract
Abstract
Cyclic oligomers including penta-, hexa-, and heptamer (COTPAs-5, 6, and 7, respectively), where 4-octyltriphenylamine units directly links together at 4,4’-positions, were isolated and characterized as hole transporting materials. With the increase of the macrocyclic size, wavelengths of absorption maximum and edge showed red-shift resulting from the increase of effective conjugation length. It is noteworthy that Stokes shift decreased with the size. SCLC hole mobilities in COTPAs-5, 6 and 7 were estimated to be 1.82 × 10-5, 1.20 × 10-4 and 5.11 × 10-5 cm2/Vs, respectively, which was higher than that of linear polymeric analogue (1.67 × 10-6 cm2/Vs).
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Research context
OpenAlex topics: Organic Electronics and Photovoltaics · Organic Light-Emitting Diodes Research · Conducting polymers and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology
Graduate School of Bio-Applications and Systems Engineering, and
Institute of Global Innovation Research, Tokyo University of Agriculture and Technology
References (20)
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