Abstract
In this thesis, I focused on development of morphology control and device structure engineering of solution-processed organic solar cells (OSCs) and solution-processed MoOx (s-MoOx) treated silver nanowire (AgNWs) transparent conducting electrodes (TCE). In the first part of this thesis, we reviewed the development of solution-processed OSCs, followed by the theory and working mechanism of silver nanowire transparent conducting electrodes. In chapter 2, we systematically studied the devices performance, surface morphology, crystallinity and external quantum efficiency (E.Q.E.) of P3HT:PC61BM organic solar cells fabricated by rapid-drying blade-coating and spin-coating methods with (w/) and without (w/o) solvent annealing. In chapter 3, we studied the optical constants of PC61BM, PC71BM and C70, and device performance of solution-processed small molecule OSCs utilizing these three acceptors and the donor-acceptor-acceptor push-pull donor molecules. In chapter 4, we investigated the atomic force microscopy, scanning electron microscopy, transmission electron microscopy (TEM), cross-sectional TEM images, photoluminance quenching measurement and device performance of inverted quasi-bilayer OSCs fabricated using halogen-free solvent. In chapter 5, we reported s-MoOx-treated AgNW TCEs utilizing low-temperature processes. Notably, this s-MoOx-treated AgNW TCEs exhibit multi-characteristics, such as high transmission, low sheet resistance, low haze value, better mechanical properties against bending and adhesion tests, and preferable gap states for efficient hole injection in optoelectronic applications.