Issue 42, 2017

Solution-processed inorganic copper(i) thiocyanate as a hole injection layer for high-performance quantum dot-based light-emitting diodes

Abstract

We report the advantageous properties of inorganic copper(I) thiocyanate (CuSCN) as a solution-processable hole injection material in quantum dot-based light-emitting diodes (QLEDs). CuSCN, with its high work function, it decreases the turn-on voltage (Vth) by 0.8 volt to 3.4 V as compared with devices based on the most-widely used poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) (Vth = 4.2 V). As a transparent, highly stable and low cost commercial material, CuSCN acting as the hole injection layer (HIL) gives the QLED better Vth, and comparable performance to PEDOT:PSS-based QLED for other parameters including maximum luminance and external quantum efficiency. The decreased Vth can improve the power efficiency and is a necessary step in meeting market demand. The successful demonstration of the solution-processed inorganic HIL using simple and low temperature processing routes provide guidelines and prospects for the development of reliable all-inorganic and tandem QLEDs and possible commercial applications at a large scale.

Graphical abstract: Solution-processed inorganic copper(i) thiocyanate as a hole injection layer for high-performance quantum dot-based light-emitting diodes

Article information

Article type
Paper
Submitted
24 Mar 2017
Accepted
11 May 2017
First published
17 May 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 26322-26327

Solution-processed inorganic copper(I) thiocyanate as a hole injection layer for high-performance quantum dot-based light-emitting diodes

T. Ding, N. Wang, C. Wang, X. Wu, W. Liu, Q. Zhang, W. Fan and X. W. Sun, RSC Adv., 2017, 7, 26322 DOI: 10.1039/C7RA03433D

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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