| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1264517 | Organic Electronics | 2013 | 8 Pages |
•A small molecule DCAEH5TBT with an A-D-A-D-A structure and BT unit has been designed and synthesized.•A PCE of 3.07% was achieved for this molecule based photovoltaic device.•Different from other previous small molecules, annealing improve significantly the PCE.
A solution processable A-D-A-D-A structure small molecule DCAEH5TBT using a BT unit as the core has been designed and synthesized for application in BHJ solar cells. The device employing DCAEH5TBT/PC61BM as active layer shows PCE of 2.43% without any post treatment. After thermal annealing (150 °C, 10 min), the PCE of this molecule based device increased to 3.07%, with Jsc of 7.10 mA/cm2, Voc of 0.78 V and FF of 55.4%, which indicates that high performance of solution processed small molecule based solar cells can be achieved using thermal annealing by carefully design molecule structure.
Graphical abstractA small molecule DCAEH5TBT with an A-D-A-D-A structure and BT unit as the core has been designed and synthesized for application in BHJ solar cells. The PCE of this molecule based device increased from 2.43% to 3.07% after thermal annealing at 150 °C for 10 min.Figure optionsDownload full-size imageDownload as PowerPoint slide
