Abstract
Recently, the anomalies of the global climate is gradually intensifying. In order to sustain the environment we lived, we must reduce the amount of carbon dioxide emissions and find the way to develop the sustainable energy. The green energy has been being developed from the past years by many outstanding teams from the world. However, in all of the green energy, the solar cell is the most environmentally-friendly one. Taiwan is located in the subtropical region so there is sufficient intensity of sunshine which is lasting average one third of a day. Thus, it is conductive to develop this kind of the new alternative energy in Taiwan. Lately, the solar cells are most of inorganic solar cells, but it has disadvantage of costliness and pollution. In contrast, organic solar cells have more commercial value than inorganic solar cells because of its advantage which are simple process, manufacturing cheaper and more environmentally-friendly. In the near future, it is necessary for organic solar cell to enlarge to reduce manufacturing cost and be more practical in our life. Moreover, the organic solar cells with flexible substrate or translucent electrodes can be more compatible for buildings or other constructions. The combination with constructions and organic solar cells will be more various and aesthetic.This thesis is mainly about the development of organic solar cell process fabricated on 20 cm x 30 cm glass substrate with active area of 216 cm2. At first, we used the structure ITO/ PEDOT:PSS/ P3HT:PC61BM/ LiF/ Al for our reaserch and reached power conversion efficiency (PCE) of 1.62%. And the structure ITO/ PEDOT:PSS/ PBDTTT-EFT: PC71BM / LiF / Al also achieved power conversion efficiency (PCE) of 5.2 %[A4]. Importantly, the large-area device based on P3HT: PC61BM and PBDTTT-EFT: PC71BM blend can retain upon 60% and 90%, respectively.At last, the metal electrode was changed to a translucent structure ITO / PEDOT: PSS / PBDTTT-EFT: PC71BM / LiF / Al / Ag. The device achieved 3.59% power conversion efficiency[A4]. Key word : Blade-coating、Large-area、Organic solar cells、High efficiency、Polymer、Thin-film process、P3HT、PBDTTT-EFT、PC61BM、PC71BM