Repository logo

Enhancing Light Absorption and Charge Transfer Efficiency in Carbon Dots Through Graphitization and Core Nitrogen Doping



Change log


Martindale, B 
Hutton, G 
Caputo, C 
Prantl, S 


Single-source precursor syntheses have been devised for the preparation of structurally similar graphitic carbon dots (CDs), with (g-N-CD) and without (g-CD) core nitrogen doping for artificial photosynthesis. An order of magnitude improvement has been realized in the rate of solar (AM1.5G) H2 evolution using g-N-CD (7950 μmolH2 (gCD)−1 h−1 ) compared to undoped CDs. All graphitized CDs show significantly enhanced light absorption compared to amorphous CDs (a-CD) yet undoped g-CD display limited photosensitizer ability due to low extraction of photogenerated charges. Transient absorption spectroscopy showed that nitrogen doping in g-N-CD increases the efficiency of hole scavenging by the electron donor and thereby significantly extends the lifetime of the photogenerated electrons. Thus, nitrogen doping allows the high absorption coefficient of graphitic CDs to be translated into high charge extraction for efficient photocatalysis.



carbon dots, doping, excited state dynamics, light harvesting

Journal Title

Angewandte Chemie - International Edition

Conference Name

Journal ISSN


Volume Title


John Wiley & Sons Ltd.
Christian Doppler Forschungsgesellschaft (unknown)
European Commission (624997)
Oppenheimer PhD scholarship, Poynton PhD scholarship, Marie Curie postdoctoral fellowship, FRQNT postdoctoral fellowship, ERC Intersolar project, Christian Doppler Research Association (Austrian Federal Ministry of Science, Research and Economy and the National Foundation for Research, Technology and Development), OMV