Issue 41, 2017

Flash-evaporated small molecule films toward low-cost and flexible organic light-emitting diodes

Abstract

The high cost of vacuum thermal evaporation and the challenging fabrication of multilayer devices by the solution processing method restrict the commercialization of organic light-emitting diodes (OLEDs). Herein, we introduce a flash evaporation method where an organic film pre-coated on a silicon wafer is re-deposited by sudden exposure to high temperature (∼1000 °C) in a rough vacuum to fabricate small molecule-based multilayer OLEDs. The flash-evaporated organic films maintain the original molecular structure after flash evaporation. Compared with the random molecular orientation of spin-coated small molecule films, flash-evaporated films have a high degree of molecular orientation perpendicular to the substrate surface. As a result, flash-evaporated OLEDs exhibit improved efficiency with low roll-off compared with spin-coated devices. The successful fabrication of a flexible, large-area (20 × 20 mm2) OLED suggests the great potential of the flash evaporation method for fabricating flexible and large area OLEDs with low cost in the future.

Graphical abstract: Flash-evaporated small molecule films toward low-cost and flexible organic light-emitting diodes

Supplementary files

Article information

Article type
Paper
Submitted
05 ago 2017
Accepted
11 set 2017
First published
13 set 2017

J. Mater. Chem. C, 2017,5, 10721-10727

Flash-evaporated small molecule films toward low-cost and flexible organic light-emitting diodes

B. Wang, Z. Wang, J. Liang, M. Li, Y. Hu and L. Liao, J. Mater. Chem. C, 2017, 5, 10721 DOI: 10.1039/C7TC03529B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements