Abstract
Dye sensitized solar cells have been paying much attention for 25 years due to its high power conversion efficiency. All-printable monolithic structure is known for simple process and easy to apply at large scale. The bright future of this structure is undebatable. Basing on that, our lab has set up all-printable monolithic PV fabrication process. In this research, all-printable monolithic structure had applied in liquid-based and solid-state DSC. These are 5 chapters in this dissertation: Chapter I is introduction to solar energy and terminologies in solar cells. Chapter II generally introduced to components in dye-sensitized solar cells, its operation principle, several structures using in dye-sensitized solar cells and literature review to all-printable monolithic structure in PV devices. Chapter III is experimental section. Carbon and spacer paste fabrication were mentioned in second section of this part. Liquid-based all-printable monolithic dye-sensitized solar cells was fabricated. Besides that, some components in solid-state all-printable monolithic dye-sensitized solar cells such as blocking layer, spiro-OMeTAD deposition methods, sensitizer also introduce. After choosing the appropriate component, solid-state all-printable monolithic dye-sensitized solar cells was fabricated. Liquid-based and solid-state conventional devices were fabricated for comparing. Chapter IV is the results and discussion. We separated into 3 parts: (i) the carbon black: graphite of 20 wt.% and annealing temperature at 450 oC were chosen; (ii) liquid-based all-printable monolithic dye-sensitized solar cells is lower PCE than conventional using liquid electrolyte due to high series resistance; (iii) after investigating blocking layer and spiro-OMeTAD deposition method, solid-state all-printable monolithic device achived Jsc of 3.439 mA.cm-2 which is comparable to conventional one using gold as counter electrode (3.534 mA.cm-2). Changing Ru-based sensitizer by organic sensitizer with long alkyl chains improved performance of device. The PCE of 1.790 % was achived with high stability. Chapter V is conclusions, future works and outlook for all-printable monolithic dye-sensitized solar cells.