Optimization of ClAlPc and C70 based Organic Photovoltaic Device Fabricated by Coevaporation Method
| Autor: | Bo-yao Huang, 黃柏堯 |
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| Rok vydání: | 2014 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 102 In this thesis, we investigate that the influence of the device structure variation on the short circuit current, open circuit voltage and fill factor. We optimize the device structure to enhance the power conversion efficiency of the small molecule organic solar cell. We use chloro-aluminum phthalocyanine (ClAlPc) and C70 as donor and acceptor respectively and expect the wide absorption band of ClAlPc and C70 will increase the short circuit current. Through hybrid planar-mixed structure, the donor and acceptor materials allows the formation of more dissociation sites, where the excitons can be converted into free carriers and contribute to the photocurrents. We adjust the position of optical filed by changing thickness of C70 layer. Carrier mobility rises by tuning the thickness and the ratio of the mixing layer. We observe the improvement not only the efficiency but also the characteristic of devices. At last, we adjust the thickness of ClAlPc layer to improve the open circuit voltage and achieve high power conversion efficiency small molecule organic solar cell. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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