Improving the light-harvesting of amorphous silicon solar cells with photochemical upconversion
Single-threshold solar cells are fundamentally limited by their ability to harvest only those photons above a certain energy. Harvesting below-threshold photons and re-radiating this energy at a shorter wavelength would thus boost the efficiency of such devices. We report an increase in light harves...
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| Veröffentlicht in: | Energy & environmental science 2012-05, Vol.5 (5), p.6953-6959 |
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| creator | Cheng, Yuen Yap Fückel, Burkhard MacQueen, Rowan W Khoury, Tony Clady, Raphaël G. C. R Schulze, Tim F Ekins-Daukes, N. J Crossley, Maxwell J Stannowski, Bernd Lips, Klaus Schmidt, Timothy W |
| description | Single-threshold solar cells are fundamentally limited by their ability to harvest only those photons above a certain energy. Harvesting below-threshold photons and re-radiating this energy at a shorter wavelength would thus boost the efficiency of such devices. We report an increase in light harvesting efficiency of a hydrogenated amorphous silicon (a-Si:H) thin-film solar cell due to a rear upconvertor based on sensitized triplet-triplet-annihilation in organic molecules. Low energy light in the range 600-750 nm is converted to 550-600 nm light due to the incoherent photochemical process. A peak efficiency enhancement of (1.0 ± 0.2)% at 720 nm is measured under irradiation equivalent to (48 ± 3) suns (AM1.5). We discuss the pathways to be explored in adapting photochemical UC for application in various single threshold devices.
Photochemical upconversion (UC) is applied to amorphous silicon solar cells (SC) to bring about an increase in light-harvesting efficiency. |
| doi_str_mv | 10.1039/c2ee21136j |
| format | Article |
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Photochemical upconversion (UC) is applied to amorphous silicon solar cells (SC) to bring about an increase in light-harvesting efficiency.</description><subject>Amorphous silicon</subject><subject>Devices</subject><subject>Equivalence</subject><subject>Harvesting</subject><subject>Photochemical</subject><subject>Photons</subject><subject>Photovoltaic cells</subject><subject>Solar cells</subject><issn>1754-5692</issn><issn>1754-5706</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqFkM1LxDAQxYMouK5evAvxJkI1k6bJ9ijix8KCFz2HNEm3WdqmJt0V_3uzrB940dMM834M7z2EToFcAcnLa02tpQA5X-2hCYiCZYUgfP9r5yU9REcxrgjhlIhyguS8G4LfuH6Jx8bi1i2bMWtU2Ng4bo--xqrzYWj8OuLoWqd9j6NvVcDatm3Eb25scJJHrxvbOa1avB4StLEhOt8fo4NatdGefM4perm_e759zBZPD_Pbm0WmGaVjRo0yxNR5VdaE8QoMM1xzoAXhleXGlBpKOwOoLQdT5CBskVNdMS2oEGXB8ym62P1NaV7XybzsXNw6VL1N1iUIAoQxwuj_aMEJwKwkIqGXO1QHH2OwtRyC61R4l0DktnD5U3iCz3ZwiPqb-6Wf_6XLIeX_AAy1ijU</recordid><startdate>20120501</startdate><enddate>20120501</enddate><creator>Cheng, Yuen Yap</creator><creator>Fückel, Burkhard</creator><creator>MacQueen, Rowan W</creator><creator>Khoury, Tony</creator><creator>Clady, Raphaël G. 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| fulltext | fulltext |
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| ispartof | Energy & environmental science, 2012-05, Vol.5 (5), p.6953-6959 |
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| language | eng |
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| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Amorphous silicon Devices Equivalence Harvesting Photochemical Photons Photovoltaic cells Solar cells |
| title | Improving the light-harvesting of amorphous silicon solar cells with photochemical upconversion |
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