294183-85-0Relevant academic research and scientific papers
Accepting to Donate: NDI-Based Small Molecule as a Donor for Bulk Heterojunction Binary Solar Cells
Mishra, Ruchika,Sujesh,Archana,Kaushik, Ayushi,Gupta, Gaurav,Singhal, Rahul,Sharma, Ganesh D.,Sankar, Jeyaraman
, p. 1603 - 1610 (2020)
A small molecular D-π-A-π-D triad NDIP consisting of naphthalenediimide (NDI) as an acceptor and porphyrin as a donor was synthesized. NDIP exhibits an intense absorption from visible to NIR region (400 nm to 1000 nm) with high molecular extinction coefficient. Endowed with excellent absorption and good charge carrier mobility, the molecule was used as a donor, against the normal perception as an acceptor due to the electron-deficient nature of NDI, in the binary bulk heterojunction solar cells with PCBM as an acceptor. The cell demonstrated remarkable power conversion efficiency of 8.45 % with extremely low Eloss of 0.40 eV, which is also the best recorded for NDI based small molecule organic solar cells.
Making conjugated connections to porphyrins: A comparison of alkyne, alkene, imine and azo links
Screen, Thomas E.O.,Blake, Iain M.,Rees, Leigh H.,Clegg, William,Borwick, Simon J.,Anderson, Harry L.
, p. 320 - 329 (2007/10/03)
A series of porphyrins 5-9 has been prepared, in which an aryl substituent is linked to the porphyrin via azo, imine, alkene and alkyne bridges. The strength of aryl-porphyrin electronic coupling in these systems was evaluated from the red shift and intensification of the Q band absorption and emission spectra, and from the incremental red shift on changing from the phenyl to a 4-nitrophenyl substituent. The azo link provides the strongest electronic communication between the porphyrin and the benzene ring. The crystal structures of azo compounds 5a and 5c show that the porphyrin and benzene rings are almost coplanar, whereas imine 7a and alkene 8a are significantly twisted in the solid state. Imine and alkyne linked porphyrin dimers 18 and 23 were also synthesized; the alkyne-linked dimer is much more conjugated than its imine-linked analogue.
