Shine on you crazy carbon! In this work, nitrogen-doped carbon quantum dots (N-CQDs) are synthesized using a simple custom atmospheric pressure microplasma. The method is facile, rapid, and environmentally friendly and the N-CQDs can be produced in a few minutes with no need for high temperature, complicated chemical techniques, or surface ligands. The N-CQDs are formed using molecular precursors and can be produced in different solvent mixtures. Material characterization techniques show a high degree of nitrogen doping on the QD surface with the amount of nitrogen depending on initial reaction conditions. The N-CQDs show interesting quantum confined optical properties that depend on the amount of nitrogen incorporation. Importantly, the band energy structure of the N-CQDs is elucidated and they are incorporated into a photovoltaic device as the photoactive layer achieving an extraordinary open-circuit voltage of 1.8 V and a power conversion efficiency of 0.8 (champion device), amongst the highest reported to date for group IV and carbon based quantum dots.
|Journal||Sustainable Energy Fuels|
|Early online date||9 Aug 2017|
|Publication status||E-pub ahead of print - 9 Aug 2017|
- quantum dots
Carolan, D., Rocks, C., Padmanaban, D. B., Maguire, PD., Svrcek, V., & Mariotti, D. (2017). Environmentally friendly nitrogen-doped carbon quantum dots for next generation solar cells. Sustainable Energy Fuels, 1, 1611-1619. https://doi.org/10.1039/C7SE00158D