Increased upconversion performance for thin film solar cells: a trimolecular composition
| Autor: | Gordon G. Wallace, Tony Khoury, Andrew Nattestad, T. F. Schulze, Burkhard Fückel, Timothy W. Schmidt, Klaus Lips, Yuen Yap Cheng, Rowan W. MacQueen, Maxwell J. Crossley |
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| Rok vydání: | 2016 |
| Předmět: |
Amorphous silicon
Materials science Photon 02 engineering and technology Quantum dot solar cell 010402 general chemistry 01 natural sciences 7. Clean energy Polymer solar cell law.invention chemistry.chemical_compound law Solar cell Plasmonic solar cell Methods and concepts for material development business.industry General Chemistry Hybrid solar cell 021001 nanoscience & nanotechnology Photon upconversion 0104 chemical sciences Chemistry chemistry Physics::Accelerator Physics Optoelectronics 0210 nano-technology business |
| Zdroj: | Chemical Science |
| ISSN: | 2041-6539 2041-6520 |
| Popis: | A dual-emitter upconvertor is applied to thin-film solar cells for the first time, generating record figures of merit. Photochemical upconversion based on triplet–triplet annihilation (TTA-UC) is employed to enhance the short-circuit currents generated by two varieties of thin-film solar cells, a hydrogenated amorphous silicon (a-Si:H) solar cell and a dye-sensitized solar cell (DSC). TTA-UC is exploited to harvest transmitted sub-bandgap photons, combine their energies and re-radiate upconverted photons back towards the solar cells. In the present study we employ a dual-emitter TTA-UC system which allows for significantly improved UC quantum yields as compared to the previously used single-emitter TTA systems. In doing so we achieve record photo-current enhancement values for both the a-Si:H device and the DSC, surpassing 10–3 mA cm–2 sun–2 for the first time for a TTA-UC system and marking a record for upconversion-enhanced solar cells in general. We discuss pertinent challenges of the TTA-UC technology which need to be addressed in order to achieve its viable device application. |
| Databáze: | OpenAIRE |
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