Novel quinoline-based sensitizers coupled with diethylenetriamine as a new co-adsorbent to improve photovoltaic performance of dye-sensitized solar cells

Two novel metal-free dyes with 2-ethylhexyloxy substituted triphenylamine as the donor, quinoline as the π-conjugated bridge, benzothiadiazole (BIM27) and N-propylbenzotriazole (BIM28) as the auxiliary acceptors and cyanoacrylic acid as the anchoring group were synthesized and used as the sensitizer...

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Bibliographic Details
Published in:Dyes and pigments 2023-10, Vol.218, p.111476, Article 111476
Main Authors: Sevindik, Saadet, Gezgin, Merve, Öztürk, Nagihan, Arslan, Barış Seçkin, Avcı, Davut, Nebioğlu, Mehmet, Şişman, İlkay
Format: Article
Language:English
Subjects:
Auxiliary acceptor
Co-adsorbent
D-π-A-π-A
Diethylenetriamine
Dye-sensitized solar cell
Quinoline
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Summary:Two novel metal-free dyes with 2-ethylhexyloxy substituted triphenylamine as the donor, quinoline as the π-conjugated bridge, benzothiadiazole (BIM27) and N-propylbenzotriazole (BIM28) as the auxiliary acceptors and cyanoacrylic acid as the anchoring group were synthesized and used as the sensitizers for dye-sensitized solar cells (DSSCs). It was found that BIM 27 exhibits anti-aggregation ability, whereas BIM28 forms the undesired aggregates. Therefore, chenodeoxycholic acid (CDCA) and diethylenetriamine (DETA) molecules were employed as the co-adsorbents to suppress the dye aggregation of BIM28. The DSSC with DETA exhibited a highest power conversion efficiency (PCE) of 3.89%, a remarkable improvement of 25% compared with 3.11% of the cell fabricated without co-adsorbent, exceeding that of the benchmark CDCA-based cell (3.57%) under AM 1.5G conditions. The small DETA can effectively insert between the bulky dye molecules compared to the large CDCA, resulting a more compact dye packing on TiO2, able to less charge recombination. The results demonstrate that DETA may be more efficient for co-adsorption of the bulky dyes. [Display omitted] •D–π–A–π–A quinoline-based BIM27 and BIM28 dyes were synthesized for DSSCs.•BIM 27 displays anti-aggregation ability, whereas BIM28 has a tendency to aggregate.•DETA was used for the first time as a co-adsorbent to suppress aggregation of BIM28.•The PCE of DSSC with DETA was found to be superior to that of CDCA, benchmark co-adsorbent.
ISSN:0143-7208
1873-3743
DOI:10.1016/j.dyepig.2023.111476