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A new strategy for structuring white organic light-emitting diodes by combining complementary exciplex emissions in the same interface

Abstract

In this work,we proposed a new strategy for structuring white organic light-emitting diodes (WOLEDs) using all exciplex emissions, where the white devices can be fabricated by simply depositing several exciplex acceptor layers on the same exciplex donor layer in vertical direction, and complementary exciplex emissions can be realized in above same exciplex donor layer interface for forming white emission. Based on this new strategy, a series of WOLEDs with the different array arrangements of different exciplex acceptor layers on the same exciplex donor layer were demonstrated. The device with a bisected blue-yellow exciplex acceptor layers on the same exciplex donor layer realizes good two-colors white emission with a high color rendering index of 71, and also achieves a high current efficiency of 3.17 cd/A. Moreover, the emission spectra and device performance of white devices can be adjusted and improved by simply changing the array arrangements of different exciplex acceptor layers on the same exciplex donor layer. More importantly, the proposed new strategy can effectively solve the interface problem induced by employing interface exciplexes to realize multi-colors white emission, which provide an new thought to accomplish all exciplex emissions WOLEDs.

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Supplementary files

Article information


Submitted
12 Nov 2019
Accepted
10 Jan 2020
First published
12 Jan 2020

J. Mater. Chem. C, 2020, Accepted Manuscript
Article type
Paper

A new strategy for structuring white organic light-emitting diodes by combining complementary exciplex emissions in the same interface

X. Wei, L. Gao, Y. Miao, Y. Zhao, M. Yin, H. Wang and B. Xu, J. Mater. Chem. C, 2020, Accepted Manuscript , DOI: 10.1039/C9TC06198C

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