Double-Cable Polyfullerenes

Double-cables are members of the charm-bracelet polyfuUerene family [15], with the specificity that their bracelet is a tr-conjugated chain. Electrochemical polymerization is among the most straightforward methods to synthesize Ji-conjugated 

Photoinduced Charge Transfer in Double able Polyfiillerenes 

The photoinduced absorption spectrum showed two bands at about 1.4 and 0.6 eV, features typical of positive polarons on a thiophene-based backbone. The 

The above results demonstrated that in this class of polyfullerenes (i) the ground-state electronic properties of the D backbone and the tethered fullerene A can retain their individual properties and (ii) a photoinduced electron transfer from the D to the A leads to metastable and mobile charges, that is, the covalent linkage between them does not forcedly enhance geminate monomolecular recombination. 

Excitation at488nm (20mWcm ) 7- 77K. (Reproduced from Reference [23] with permission of the Royal Society of Chemistry.) 

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Electrochemically or Chemically Synthesized Double-Cable Polyfullerenes... 

Recently, the group of li have described solar cells based on double-cable polyfullerenes [54]. The PT-F (see 16 in Figure 8.14) is based on a polythiophene chain... 

We first, briefly, introduce the concept of bulk heterojunchon solar cells, with the aim of pointing out the importance of the nanomorphology and the degree of D-A separation within the photoactive layer. Then, with no claims of completeness, we select examples of polyfullerene double-cables from the recent literature. 

As shown in Figure 8.15, under AMI.5 solar simulated illumination (lOOmWcm ), solar cells based on this polyfullerene double-cable provided an open circuit voltage of 750 mV and a short circuit current density of 2.41 mAcm values that together with a filling factor of 0.29 determine a power conversion efficiency of 0.52% [6]. 

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