title: Solution-Processed Hybrid Light-Emitting Devices Comprising TiO2Nanorods and WO3Layers as Carrier-Transporting Layers.
abstract: The goal of this research is to prepare inverted light-emitting devices with improved performance by combining titanium dioxide (TiO2) nanorods and tungsten trioxide (WO3) layer. TiO2nanorods with different lengths were established directly on the fluorine-doped tin oxide (FTO) substrates by the hydrothermal method. The prepared TiO2nanorods with lengths shorter than 200 nm possess transmittance higher than 80% in the visible range. Inverted light-emitting devices with the configuration of FTO/TiO2nanorods/ionic PF/MEH-PPV/PEDOT:PSS/WO3/Au were constructed. The best device based on 100-nm-height TiO2nanorods achieved a max brightness of 4493 cd/m2and current efficiency of 0.66 cd/A, revealing much higher performance compared with those using TiO2compact layer or nanorods with longer lengths as electron-transporting layers.
authors.affiliation: Institute of Lighting and Energy Photonics, National Chiao Tung University, No. 301, Gaofa 3rd Road, Guiren District, Tainan, 71150, Taiwan, Republic of China.
authors.forename: Tsung-Yan
authors.initials: TY
authors.lastname: Tsai
authors.affiliation: Institute of Lighting and Energy Photonics, National Chiao Tung University, No. 301, Gaofa 3rd Road, Guiren District, Tainan, 71150, Taiwan, Republic of China.
authors.forename: Po-Ruei
authors.initials: PR
authors.lastname: Yan
authors.affiliation: Institute of Lighting and Energy Photonics, National Chiao Tung University, No. 301, Gaofa 3rd Road, Guiren District, Tainan, 71150, Taiwan, Republic of China. yangsh@mail.nctu.edu.tw.
authors.forename: Sheng-Hsiung
authors.initials: SH
authors.lastname: Yang
keywords: Electron-transporting layers; Inverted light-emitting devices; Titanium dioxide nanorods; Tungsten trioxide