Secondly, the photoelectric properties of carbon dots and their adjusting, including adjustable surface energy level structure, good film-forming performance and up/down conversion characteristics are summarized. Thirdly, based on these intrinsic properties, the feasibility and advantages of carbon dots used in organic solar cells are discussed.
Here, we developed a kind of quantum dots solar cell based on nitrogen-doped carbon dots. The nitrogen-doped carbon dots were prepared by direct pyrolysis of citric acid and ammonia. The nitrogen-doped carbon dots’ excitonic absorption depends on the N-doping content in the carbon dots.
One-pot large-scale synthesis of carbon quantum dots: efficient cathode interlayers for polymer solar cells. ACS Appl. Mater. Interfaces 2017, 9, 14953–14959.
An easily prepared carbon quantum dots and employment for inverted organic photovoltaic devices. Chem. Eng. J. 2017, 315, 621–629.
In summary, we have developed “green” quantum dot solar cells based on nitrogen-doped carbon dots. The optimal NCD-based solar cells achieve a PCE of 0.79 % with J sc of 2.65 mA cm −2, V oc of 0.47 V, and FF of 62.5 %. The obtained PCE is the highest value in the reported QDSCs based on CDs.
Among the third-generation photovoltaics, quantum dot solar cells (QDSCs) are emerging as a promising candidate due to the unique and versatile characteristics of quantum dots (QDs) including tunable band gap and high absorption coefficient [1 – 4].