Enhanced efficiency of all-inorganic perovskite light-emitting diodes by using F4-TCNQ-doped PTAA as a hole-transport layer

Abstract

We demonstrate an enhanced efficiency of all-inorganic perovskite light-emitting diodes (PeLEDs) by doping an electron acceptor of 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ) as a p-type dopant into the hole-transport layer (HTL) of poly-triarylamine (PTAA). The conductivity of the PTAA was improved by the formation of the CT complex through the electron transfer from the PTAA to F4TCNQ. Moreover, the hydrophobic surface of the PTAA leads to an improved surface morphology of the perovskite films compared to that on the conventionally used HTL of PEDOT:PSS. As a result, the maximum luminance and efficiency for the doped PTAA-based PeLEDs are $28020\mathrm{cd}/{\mathrm{m}}^2$ and 13.5 cd/A, respectively, corresponding to 32.7% and 48% improvement in the efficiency compared to those of the pure PTAA or PEDOT:PSS-based PeLEDs.

© 2019 Optical Society of America

Interlayer doping with p-type dopant for charge balance in indium phosphide (InP)-based quantum dot light-emitting diodes

Hyejin Kim, Woosuk Lee, Hyungsuk Moon, Sun Jung Kim, Ho Kyoon Chung, and Heeyeop Chae
Opt. Express 27(16) A1287-A1296 (2019)

Improved performance of pure red perovskite light-emitting devices based on CsPb(Br_1-xI_x)₃ with variable content of iodine and bromine

Shuang Guo, Yue-Feng Liu, Yu-Shan Liu, Jing Feng, and Hong-Bo Sun
Opt. Lett. 45(10) 2724-2727 (2020)

Improved light extraction in all-inorganic perovskite light-emitting devices with periodic nanostructures by nanoimprinting lithography

Shuang Guo, Yu-Shan Liu, Xu-Lin Zhang, Yue-Feng Liu, Yan-Gang Bi, Xue-Mei Wen, Jing Feng, and Hong-Bo Sun
Opt. Lett. 45(18) 5156-5159 (2020)

Highly flexible organic–inorganic hybrid perovskite light-emitting devices based on an ultrathin Au electrode

Yu-Shan Liu, Shuang Guo, Fang-Shun Yi, Jing Feng, and Hong-Bo Sun
Opt. Lett. 43(22) 5524-5527 (2018)

Solution-processable organic-inorganic hybrid hole injection layer for high efficiency phosphorescent organic light-emitting diodes

Min Hsuan Lee, Wing Hong Choi, and Furong Zhu
Opt. Express 24(6) A592-A603 (2016)