Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Constructing new N-type, ambipolar, and P-type aggregation-induced blue luminogens by gradually tuning the proportion of tetrahphenylethene and diphenylphophine oxide

Language

English

Abstract

By gradually adjusting the proportion of tetraphenylethene (TPE) and phosphine oxide (PO), the series of n-type, ambipolar, and p-type aggregation-induced emission (AIE) luminogens (E,Z)-((1,2-diphenylethene-1,2- diyl)bis(4,1-phenylene))bis(diphenylphosphine oxide) (TPEDPO), diphenyl(4-(1,2,2-triphenylvinyl)phenyl)phosphine oxide (TPEPO), phenylbis(4-(1,2,2-triphenylvinyl)phenyl)phosphine oxide (DTPEPO), and tris(4-(1,2,2-triphenylvinyl)phenyl)phosphine oxide (TTPEPO) were developed for the first time. Their optical and electronic properties and AIE characteristics were investigated carefully. Time-resolved spectra indicate that the transient fluorescence decay lifetimes of aggregation-induced blue luminogens change regularly with the aggregation degree in THF/water solution. Particularly, identical electron and hole mobilities (∼2.3 × 10 -4 cm2 V-1 s-1) can be realized when the TPE/PO ratio is 1:1. In electroluminesent (EL) devices, the sky-blue-doped device based on TPEPO was found to exhibit a low turn-on voltage of 2.8 V, a maximum luminance (Lmax) of 8656 cd m-2, a maximum current efficiency (ηC,max) of 9.32 cd A-1, and a maximum power efficiency (ηP,max) of 10.23 lm W-1. © 2014 American Chemical Society.

Publication Date

2014

Source Publication Title

Journal of Physical Chemistry C

Volume

118

Issue

16

Start Page

8610

End Page

8616

Publisher

American Chemical Society

DOI

10.1021/jp501752a

Link to Publisher's Edition

http://dx.doi.org/10.1021/jp501752a

ISSN (print)

19327447

ISSN (electronic)

19327455

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