Abstract
The blade coating method has been overcame the dissolution and accomplished the multi-layer structure. In this thesis, organic light-emitting diodes (OLEDs) and organic solar cell are made by blade coating method. For OLEDs, various fluorescent emitters are introduced into the Blue S host to produce various colors including white. The current efficiency of 4.3 cd/A is achieved for blue, 9 cd/A for orange, and 6.9 cd/A for white. Bulk heterojunction organic solar cell with poly(3-hexylthiophene) (P3HT) donor and (6,6)-phenyl-C61-butyric acid methyl ester (PCBM) acceptor is deposited by blade coating method. The fabrication throughput is greatly enhanced. The blade coated film has a smoother surface roughness of 3.5 nm compared with 10.5 nm for solvent annealing, yet the desired phase separation in the 50 nm scale forms despite of the rapid drying. Single layer solar cell shows power conversion effi-ciency of 4.1 % with blade coating in chlorobenzene, same as solvent annealing de-vice. Multi-layer device with carrier blocking layers fabricated entirely of the less toxic toluene also gives efficiency of 4.1 %. Keywords: organic light-emitting diodes、organic solar cells、blade coating method、 multi-layer、bulk heterojunction solar cells、phase separation、blocking layer