At Solenne we also prepare fulleropyrrolidines, also known as Prato adducts. Some  examples of the serivatives are derpicted below.  Solenne BV – Zernikepark 6 – 9747AN Groningen – The Netherlands – © 2014 Solenne BV  Products – Fulleropyrrolidines Derivative with increased dielectric constants: PTEG-1 PTEG-1 was recently published. It has a considerably higher dielectric constant than PCBM. It has  been reported that the efficiency of polymer-fullerene organic solar cells can be increased by using  compounds that have high dielectric constants.   Quantity Price 0.10 g      40 euro 0.25 g      90 euro 0.50 g     175 euro for larger quantities: inquire back to products page Precursor for electron-transporting layers: PrC60MA PrC60MA is a precursor for preparing electron-transporting layer materials such as ETL-1 and ETL-2.  See J. Mater. Chem. 2012, 22, p.8574.   Quantity Price 0.10 g      50 euro 0.25 g    120 euro 0.50 g     240 euro for larger quantities: inquire