Abstract
An intermediate unit (IMU) of tandem organic light-emitting diode (TOLED) can affect the emission spectral stability because of the different charge-carrier migration and outcoupling efficiency at intermediate/emitting unit interface. In this work, an IMU consisting of carbon 60 and copper(II) phthalocyanine, inserted between red-emitting unit and blueemitting unit, were constructed and fabricated. We focus on the effect of the relative location of the red-emitting unit and blue-emitting unit in the device configuration on the emission spectral stability of TOLED. In the color-Tunable TOLED, a maximum current efficiency of 20.4 cd/A, along with lightemitting spectra tuning from red emission at (0.63, 0.31) according to Commission Internationale de L'Eclairage coordinates at a bias of 10 V to white emission at (0.34, 0.27) at 22 V, is realized. Meanwhile, in the color-stable TOLED, a maximum current efficiency of 15.5 cd/A and a stable white emission at (0.31, 0.27) in a wide range of biases from 12 to 22 V are also obtained. This work might inspire a promising approach for the fabrication of color-Tunable and color-stable OLEDs for both information display and solid-state lighting.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 3348-3356 |
| Number of pages | 9 |
| Journal | ACS Omega |
| Volume | 3 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 31 2018 |
Funding
National Natural Science Foundation of China (NSFC) (Grant No. 61675041) The authors gratefully acknowledge the financial support from the Foundation of National Natural Science Foundation of China (NSFC) (Grant No. 61675041), the Foundation of Innovation Research Groups of NSFC (Grant No. 61421002), and Science & Technology Department of Sichuan Province (Grant Nos. 2016HH0027 and 2016FZ0100).
ASJC Scopus subject areas
- General Chemical Engineering
- General Chemistry