Fullerene-free organic solar cells with an efficiency of 3.7% based on a low-cost geometrically planar perylene diimide monomer
Singh, R; Aluicio-Sarduy, E; Kan, Z; Ye, T; Mackenzie, RCI; Keivanidis, PE
| HERO ID | 3575837 |
|---|---|
| In Press | No |
| Year | 2014 |
| Title | Fullerene-free organic solar cells with an efficiency of 3.7% based on a low-cost geometrically planar perylene diimide monomer |
| Authors | Singh, R; Aluicio-Sarduy, E; Kan, Z; Ye, T; Mackenzie, RCI; Keivanidis, PE |
| Volume | 2 |
| Issue | 35 |
| Page Numbers | 14348-14353 |
| Abstract | The aggregate-induced limitation for high power-conversion efficiencies (PCEs) of perylene-diimide (PDI):polymer solar cells can be circumvented when two simple rules are respected; the aggregate size of PDI remains short enough and the omnipresent PDI aggregates are electronically interconnected. Following these guidelines, a PCE of 3.7% is delivered by using the solution-processable, planar PDI monomer of N,N'-bis(1-ethylpropyl)-perylene-3,4,9,10-tetracarboxylic diimide as the electron acceptor mixed with the low-energy gap polymeric donor poly[(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)-benzo[1,2-b;4,5-b']dithiophene)-2,6-diyl-alt-(4-(2-ethylhexanoyl)-thieno[3,4-b]thiophene))-2,6diyl] (PBDTTT-CT). The PBDTTT-CT:PDI composite absorbs strongly the light in the region of 400 nm-800 nm and after adding a small amount of 1,8-diiodooctane (DIO) efficient photocurrent generation is achieved. Space-charge limited dark current and transient photovoltage measurements suggest that the use of the DIO component optimizes the electron/hole carrier mobility ratio, suppresses the non-geminate recombination losses and improves the charge extraction efficiency. |
| Doi | 10.1039/c4ta02851a |
| Wosid | WOS:000340768000007 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal:JOURNAL OF MATERIALS CHEMISTRY A 2050-7488 |
| Is Public | Yes |