| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 176405 | Dyes and Pigments | 2013 | 10 Pages |
•Three novel dihydro-5H-dibenzo[b,f]azepine based dyes with a D–D–π–A system were designed and synthesized.•Carboxy and hydroxy groups were introduced into the dye molecules as additional lateral anchoring groups.•The additional lateral anchoring groups influence the photovoltaic performance of the dyes.
Three novel metal-free organic dyes with dihydro-5H-dibenzo[b,f]azepine as a donor and cyanoacrylic acid as an anchoring unit were designed as an innovative linear skeleton of D–D–π–A type of organic dyes. The conversion efficiency of the derived dye-sensitized solar cells is moderate. Among them, the dye with a hydroxy group as an additional anchoring moiety exhibited the highest UV–Vis absorption with a maximum molar extinction coefficient of 24,136 M−1 cm−1 at λmax = 458 nm and the best photovoltaic performance with an overall power conversion efficiency of 4.88%, while the dye with a carboxy group as an additional anchoring moiety exhibited the lowest conversion efficiency (4.52%). The results show that the dye loading on the film and photovoltaic performance of the dyes were influenced by the additional anchoring units.
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