C Amruth, Colella Marco, Griffin Jonathan, Kingsley James, Scarratt Nicholas, Luszczynska Beata, Ulanski Jacek
Department of Molecular Physics, Lodz University of Technology, Lodz 90 924, Poland.
Department of Physics, Durham University, Durham DH1 3LE, UK.
Micromachines (Basel). 2019 Jan 14;10(1):53. doi: 10.3390/mi10010053.
This study presents the slot-die coating process of two layers of organic materials for the fabrication of organic light emitting diodes (OLEDs). Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), which is commonly used in OLEDs and in organic photovoltaic devices as the hole injection layer (HIL), has been deposited via slot-die coating. Uniform films of PEDOT:PSS were obtained after optimizing the slot-die processing parameters: substrate temperature, coating speed, and ink flow rate. The film quality was examined using optical microscopy, profilometry, and atomic force microscopy. Further, poly(9,9-dioctylfluorene) (F8) and poly(9,9-dioctylfluorene-alt-benzothiadiazole) (F8BT), a well know polymer blend F8:F8BT, which is used as an emissive layer in OLEDs, has been slot-die coated. The optoelectronic properties of the slot-die coated F8:F8BT films were examined by means of photoluminescence (PL) and electroluminescence (EL) studies. The fabricated OLEDs, consisting of slot-die coated PEDOT:PSS and F8:F8BT films, were characterized to record the brightness and current efficiency.
本研究介绍了用于制造有机发光二极管（OLED）的两层有机材料的狭缝式模头涂布工艺。聚（3,4 - 亚乙基二氧噻吩）聚苯乙烯磺酸盐（PEDOT:PSS）作为空穴注入层（HIL）常用于OLED和有机光伏器件中，已通过狭缝式模头涂布进行沉积。在优化狭缝式模头加工参数（基板温度、涂布速度和油墨流速）后，获得了均匀的PEDOT:PSS薄膜。使用光学显微镜、轮廓仪和原子力显微镜对薄膜质量进行了检测。此外，聚（9,9 - 二辛基芴）（F8）和聚（9,9 - 二辛基芴 - 交替 - 苯并噻二唑）（F8BT），一种知名的聚合物共混物F8:F8BT，用作OLED的发光层，已通过狭缝式模头进行涂布。通过光致发光（PL）和电致发光（EL）研究检测了狭缝式模头涂布的F8:F8BT薄膜的光电性能。对由狭缝式模头涂布的PEDOT:PSS和F8:F8BT薄膜组成的制成的OLED进行了表征，以记录亮度和电流效率。
