The Role of Carbon Quantum Dots in Organic Photovoltaics: A Short Overview

Istituto di Chimica della Materia Condensata e di Tecnologie per l’Energia, Consiglio Nazionale delle Ricerche, Abstract: Carbon quantum dots are a new class of fluorescent carbonaceous nanomaterials that were casually discovered in 2004

Barbara Vercelli

2004

Scholarcy highlights

  • Istituto di Chimica della Materia Condensata e di Tecnologie per l’Energia, Consiglio Nazionale delle Ricerche, Abstract: Carbon quantum dots are a new class of fluorescent carbonaceous nanomaterials that were casually discovered in 2004
  • Research efforts devoted to the conversion of solar energy into electrical energy through solar cells have led to the development of variable categories of solar cells, like silicon solar cells, thin-film solar cells, multi-junction solar cells, quantum dot solar cells, organic/polymer solar cells, etc
  • Recent studies reported power conversion efficiencies of ca 14% in single solar cells and ca 17% in tandem ones. Besides these advantages and the growing interest, in the field of mobile phone charges, these devices still suffer for the limit of being realized using materials that are considered toxic and hazardous in the recent vision of a sustainable economy based on solar energy
  • The theoretical and the experimental studies reported clearly show how it is possible to tailor the optical properties of CDs through simple modifications of the synthetic strategies and/or suitable post-synthetic treatments, which enable the control of their size, crystallinity, surface functional groups, and doping etheroatoms
  • It is interesting to note that the addition of 20% vol of graphene quantum dots caused an increase of 20% in the power conversion efficiency compared to a PEDOT:PSS layer without GQDs
  • CDs can act as EDS, so they can be employed as a layer in the outer surface of the dye sensitized solar cells responsible for increasing the performance of the solar cell in the wavelength range of 300–400 nm

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