Abstract
Silicon nanocrystal (Si-nc) down-conversion is demonstrated to enhance organic and hybrid organic/inorganic bulk heterojunction solar cells based on PTB7:[70]PCBM bulk heterojunction devices. Surfactant free surface-engineered Si-ncs can be integrated into the device architecture to be optically active and provide a means of effective down-conversion of blue photons (high energy photons below [similar]450 nm) into red photons (above [similar]680 nm) leading to 24% enhancement of the photocurrent under concentrated sunlight. We also demonstrate that the down-conversion effect under 1-sun is enhanced in the case of hybrid solar cells where engineered Si-ncs are also included in the active layer.
Original language | English |
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Pages (from-to) | 11566-11574 |
Journal | Nanoscale |
Volume | 7 |
DOIs | |
Publication status | Published (in print/issue) - 2015 |
Keywords
- photovoltaics
- sliicon nanocrystals