Fig. 1

Examples of natural light-harvesting systems. a Structure of the photosynthetic unit of purple non-sulfur bacteria. b Model of the light-harvesting complex 2 (LH2). c Energy transfer in the network formed by the light-harvesting complex1 (LH1) and LH2 structures. d Model of the photosynthetic unit of green sulfur bacteria. e Model of the chromosome and the molecular arrangement of self-aggregated chromophores. Reprinted with permission from: a Ref. [9], copyright (2007) National Academy of Sciences, U.S.A; b Ref. [1], copyright (2017) American Chemical Society; c Ref. [5], copyright (2012) Royal Society of Chemistry; d Ref. [12], copyright(2014) American Chemical Society; e Ref. [13], copyright (2014) Elsevier