TY - JOUR AU - Hoai Nam, Nguyen Phuong PY - 2014/10/10 Y2 - 2024/03/28 TI - Enhanced Performance in Polymer Light Emmiting Diode by Using Ultra-thin Conductive Films as the Buffer Layer JF - Communications in Physics JA - Comm. Phys. VL - 24 IS - 3S1 SE - Papers DO - 10.15625/0868-3166/24/3S1/5071 UR - https://vjs.ac.vn/index.php/cip/article/view/2 SP - 7-12 AB - The ultra-thin nanocomposite films based on the nano-crystal TiO$_{2}$ (TiO$_{2}$-nc) or multi-walled carbon nano-tube (MWCNTs) were prepared and used as the buffer layers in the fabrication of the organic light-emitting diodes (OLEDs). The injection efficiency of the hole and electron was improved by inserting an ultra-thin buffer layer between the electrodes and emissive layer. The turn-on voltage of the device with the buffer layers was lowered from 4 to 2.5V, and the current density was increased from 0.3 to 0.7~mA/mm$^{2}$, in comparison with the device without such a buffer layer. These devices showed a high efficiency and good stability. ER -