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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Grew, B. Bowers, J.W. Upadhyaya, H.M. |
| Copyright Year | 2013 |
| Description | Author affiliation: Sch. of Eng. & Phys. Sci., Heriot-Watt Univ., Edinburgh, UK (Grew, B.; Upadhyaya, H.M.) || Centre for Renewable Energy Syst. Technol. (CREST), Loughborough Univ., Loughborough, UK (Bowers, J.W.) |
| Abstract | Tandem solar cells are an attractive solution to increase the performance of one or more low efficiency, low cost technologies into a more efficient device. This has been demonstrated previously using a physically stacked dye-sensitized and Cu(In, $Ga)Se_{2}$ or CIGS solar cell. The subsequent move to a monolithic design proved to be successful, however only delivering an efficiency of 12.2 % compared to the 15.1 % of the physical stack. This may have been due to optical losses and liquid electrolyte based instabilities on the ZnO:Al layer at the bottom CIGS cell interface. Besides this, shading is known to reduce the photocurrent and voltage in thin film solar cells. In a DSC/CIGS monolithic tandem, the shading caused from measuring the cell accurately with a mask to determine the precise DSC area, reduced the $V_{oc}$ from 1221 mV to 848 mV, with a reduction in efficiency from 12.44 % to 7.75 %. It was discovered that the reduction of the CIGS active area in the tandem cell by altering the fabrication process led to a reduction in the difference between $V_{oc}$ and efficiencies, with the masked tandem producing a $V_{oc}$ of 1221mV and an efficiency of 9.38 % compared to a $V_{oc}$ of 1287 mV and efficiency of 12.30 % when unmasked. |
| Sponsorship | IEEE Electron Devices Soc. |
| Starting Page | 1008 |
| Ending Page | 1012 |
| File Size | 430942 |
| Page Count | 5 |
| File Format | |
| DOI | 10.1109/PVSC.2013.6744311 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-06-16 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Photovoltaic cells Computer architecture Microprocessors Area measurement Electrodes Performance evaluation Radiation detectors Mesoporous materials Optical losses Optimization |
| Content Type | Text |
| Resource Type | Article |
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