{"title":"10.4314 / ejst.v12i1.5","authors":"Sisay Tadesse","doi":"10.4314/ejst.v12i1.5","DOIUrl":null,"url":null,"abstract":"Dye-sensitized solar cells (DSSCs), as low-cost photovoltaic devices compared to the silicon based solar cells, have received extensive attention recently; although much work is necessary to reach optimal device efficiencies. This paper reports the fabrication and characterization of dye sensitized solar cells using TiO 2 sensitized by eosin-Y. The electrodes, electrolyte (I − ∕I 3 − ), and dyes were assembled into a cell and illuminated by a light with an intensity 100 mWcm -2 to measure the photoelectrochemical parameters of the prepared DSSCs. According to the experimental results, the maximum quantum efficiency appeared at the wavelength of 510 nm with IPCE of 64.2%. The short circuit current density (J SC ), the open circuit voltage (V OC ), and power conversion efficiency (η%) were measured to be 6.4 mAcm -2 , 0.54 V, and 2.2%, respectively. The result of UV-visible absorption and IPCE measurement showed that the IPCE correlated to the absorption spectrum of the active layer. The IPCE and η% obtained in the present work was higher than the values reported earlier for the liquid state electrolyte system indicating that the quasi-solid-state electrolyte could substitute the liquid state.","PeriodicalId":151905,"journal":{"name":"Ethiopian Journal of Science and Technology","volume":"40 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2020-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"10.4314/ejst.v12i1.5\",\"authors\":\"Sisay Tadesse\",\"doi\":\"10.4314/ejst.v12i1.5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Dye-sensitized solar cells (DSSCs), as low-cost photovoltaic devices compared to the silicon based solar cells, have received extensive attention recently; although much work is necessary to reach optimal device efficiencies. This paper reports the fabrication and characterization of dye sensitized solar cells using TiO 2 sensitized by eosin-Y. The electrodes, electrolyte (I − ∕I 3 − ), and dyes were assembled into a cell and illuminated by a light with an intensity 100 mWcm -2 to measure the photoelectrochemical parameters of the prepared DSSCs. According to the experimental results, the maximum quantum efficiency appeared at the wavelength of 510 nm with IPCE of 64.2%. The short circuit current density (J SC ), the open circuit voltage (V OC ), and power conversion efficiency (η%) were measured to be 6.4 mAcm -2 , 0.54 V, and 2.2%, respectively. The result of UV-visible absorption and IPCE measurement showed that the IPCE correlated to the absorption spectrum of the active layer. The IPCE and η% obtained in the present work was higher than the values reported earlier for the liquid state electrolyte system indicating that the quasi-solid-state electrolyte could substitute the liquid state.\",\"PeriodicalId\":151905,\"journal\":{\"name\":\"Ethiopian Journal of Science and Technology\",\"volume\":\"40 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2020-10-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Ethiopian Journal of Science and Technology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.4314/ejst.v12i1.5\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ethiopian Journal of Science and Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4314/ejst.v12i1.5","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Dye-sensitized solar cells (DSSCs), as low-cost photovoltaic devices compared to the silicon based solar cells, have received extensive attention recently; although much work is necessary to reach optimal device efficiencies. This paper reports the fabrication and characterization of dye sensitized solar cells using TiO 2 sensitized by eosin-Y. The electrodes, electrolyte (I − ∕I 3 − ), and dyes were assembled into a cell and illuminated by a light with an intensity 100 mWcm -2 to measure the photoelectrochemical parameters of the prepared DSSCs. According to the experimental results, the maximum quantum efficiency appeared at the wavelength of 510 nm with IPCE of 64.2%. The short circuit current density (J SC ), the open circuit voltage (V OC ), and power conversion efficiency (η%) were measured to be 6.4 mAcm -2 , 0.54 V, and 2.2%, respectively. The result of UV-visible absorption and IPCE measurement showed that the IPCE correlated to the absorption spectrum of the active layer. The IPCE and η% obtained in the present work was higher than the values reported earlier for the liquid state electrolyte system indicating that the quasi-solid-state electrolyte could substitute the liquid state.