CUED Publications database

Silole derivatives with a high and non-dispersive electron mobility, and a 100 % photoluminescence quantum efficiency

Murata, H and Malliaras, GG and Uchida, M and Shen, Y and Kafafi, ZH (2001) Silole derivatives with a high and non-dispersive electron mobility, and a 100 % photoluminescence quantum efficiency. Materials Research Society Symposium - Proceedings, 665. pp. 227-232. ISSN 0272-9172

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Abstract

Non-dispersive and fast electron transport was realized for an amorphous, vapor deposited film of 2,5-bis(2′,2″-bipyridin-6-yl)-1,1-dimethyl-3,4-diphenylsilacyclopent adiene in ambient and inert atmospheres. An electron mobility of 2×10-4 cm2/Vs was measured by time-of-flight at an electric field of 6×105 V/cm. This mobility is more than two orders of magnitude larger than that of the most widely used electron transporter, tris(quinolin-8-olato) aluminum (III), in molecular organic light-emitting devices (MOLEDs). Another silole derivative, namely 1,2-bis (1-methyl-2,3,4,5,-tetraphenylsilacyclopentadienyl)ethane, exhibits bright fluorescent blue-green light with an absolute quantum yield close to 100% in the solid state. MOLEDs composed of stacked neat films of these two silole derivatives and a hole transporter show a significantly low operating voltage and an external quantum efficiency of 4.8%, close to the theoretical limit.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: UNSPECIFIED
Depositing User: Cron Job
Date Deposited: 10 Sep 2017 20:11
Last Modified: 07 Mar 2019 12:02
DOI: