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Issue 7, 2016
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Rational utilization of intramolecular and intermolecular hydrogen bonds to achieve desirable electron transporting materials with high mobility and high triplet energy

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Abstract

Three new pyrimidine-containing star-shaped compounds, namely, 1,3,5-tri(3-(pyrimidin-5-yl)phenyl)benzene (TPM-TPB), 2,4,6-tris(3-(pyrimidin-5-yl)phenyl)-1,3,5-triazine (TPM-TAZ) and 3,5,6-tris(3-(pyrimidin-5-yl)phenyl)-1,2,4-triazine (TPM-i-TAZ), were synthesized and characterized. These new compounds exhibited favorable electronic affinity (Ea >2.81 eV) and the triplet energy levels (ET) up to ∼2.83 eV. X-ray diffraction analysis of the compounds revealed that the intramolecular and intermolecular C–H⋯N hydrogen bonds of TPM-TAZ resulted in high electron mobility up to 2.0 × 10−3 cm2 V−1 s−1. Using these compounds as the electron transporting materials, the blue phosphorescent organic light-emitting devices showed good performance, with a very low turn-on voltage of 2.4 V, a maximum current efficiency of 26.4 cd A−1, and a maximum power efficiency of 26.9 lm W−1.

Graphical abstract: Rational utilization of intramolecular and intermolecular hydrogen bonds to achieve desirable electron transporting materials with high mobility and high triplet energy

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Article information


Submitted
10 des. 2015
Accepted
14 jan. 2016
First published
14 jan. 2016

J. Mater. Chem. C, 2016,4, 1482-1489
Article type
Paper

Rational utilization of intramolecular and intermolecular hydrogen bonds to achieve desirable electron transporting materials with high mobility and high triplet energy

X. Yin, D. Chen, Q. Peng, Y. Xiang, G. Xie, Z. Zhu, C. Zhong, F. Li, S. Su and C. Yang, J. Mater. Chem. C, 2016, 4, 1482
DOI: 10.1039/C5TC04198H

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