Investigation of Device Performance and Interfacial Electronic Structures of Inverted Organic Solar Cells
碩士 === 國立臺灣大學 === 光電工程學研究所 === 99 === Excellent performance has been demonstrated of inverted organic solar cells (IOSCs) with indium tin oxide (ITO) modified by cesium carbonate. The IOSCs with modified ITO as cathodes exhibit a much longer life time as compared to organic solar cells (OSCs) wi...
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| Format: | Others |
| Language: | en_US |
| Published: |
2012
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| Online Access: | http://ndltd.ncl.edu.tw/handle/11036046535536846705 |
| Summary: | 碩士 === 國立臺灣大學 === 光電工程學研究所 === 99 === Excellent performance has been demonstrated of inverted organic solar cells (IOSCs) with indium tin oxide (ITO) modified by cesium carbonate. The IOSCs with modified ITO as cathodes exhibit a much longer life time as compared to organic solar cells (OSCs) with the regular structure. Using a solution-based cesium carbonate, the work function of ITO can be reduced from 4.8eV to 3.4eV to approach a relatively lower electron injection barrier. The reduction of electron injection barrier with modified ITO is also indicated by ultraviolet photoemission spectroscopy. The improvement of open circuit voltage and photo-induced current is attributed to both the reduction of electron injection barrier and the almost non-reduced light intensity. A highly efficient inverted OSC is fabricated.
Evolution of device performance is also investigated. This new structure of inverted OSC leads different factors of performance evolution. To discover the aging process, several analytical methods are utilized to realize the morphology of organic layer and surface property of modified electrodes.
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