TY - JOUR
T1 - Dendritic-based co-adsorbents for dye-sensitized solar cells
T2 - Effect of the generations and alkyl chain lengths
AU - Tseng, Yung Hsiang
AU - Li, Chun Ting
AU - Huang, Guan Wei
AU - Chen, Yung Chung
AU - Jeng, Ru Jong
AU - Dai, Shenghong A.
N1 - Funding Information:
Financial support from the Ministry of Science and Technology (MOST 106-2221-E-151-046 -MY2), Taiwan ROC are gratefully acknowledged.
Funding Information:
Financial support from the Ministry of Science and Technology (MOST 106-2221-E-151-046 -MY2 ), Taiwan ROC are gratefully acknowledged.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/4
Y1 - 2021/4
N2 - Series of dendritic building blocks (G series) with various periphery alkyl chain lengths (C3, C10 and C18) were prepared via convergent synthesis route through reaction-selective building block, (4-Isocyanato-4′(3,3-dimethyl-2,4-dioxo-azetidino)diphenylmethane, IDD) and diethylenetriamine (DETA) via alternative addition and ring-opening reaction. These azetidine-2,4-dione containing dendritic building blocks then reacted with several amino acid compounds to generate the corresponding dendritic co-adsorbents (GA series). GA series comprising different generations, various alkyl chain lengths closed to anchor and/or in the periphery are discussed and applied into dye-sensitized solar cells (DSSCs). The cells utilized similar phenothiazine-based dyes (HL5) as sensitizer with fixed concentration (0.3 mM) of co-adsorbents are fabricated to explore the effect on cell performances and interfacial charge properties. Power conversion efficiencies (PCEs) of 7.02–7.76% were achieved, which better than the commercially available CDCA co-adsorbent based cell (6.71% ± 0.14%). In addition, the highest conversion efficiency also reaches 95% of the standard cell based on N719 metal dye. Herein, several observations: (1) under various alkyl chain lengths closed to anchor, the longest one has efficient charge recombination; (2) under various alkyl chain lengths in the periphery, the moderate one has the best interfacial properties with the longest electron lifetime value; (3) under different generations, the largest one can reduce dye aggregation and charge recombination significantly. Based on our pervious initial study on dendritic co-adsorbents, we further investigated several molecular design on dendritic co-adsorbents to realize the structural effect on cell performance that might be useful for DSSC applications.
AB - Series of dendritic building blocks (G series) with various periphery alkyl chain lengths (C3, C10 and C18) were prepared via convergent synthesis route through reaction-selective building block, (4-Isocyanato-4′(3,3-dimethyl-2,4-dioxo-azetidino)diphenylmethane, IDD) and diethylenetriamine (DETA) via alternative addition and ring-opening reaction. These azetidine-2,4-dione containing dendritic building blocks then reacted with several amino acid compounds to generate the corresponding dendritic co-adsorbents (GA series). GA series comprising different generations, various alkyl chain lengths closed to anchor and/or in the periphery are discussed and applied into dye-sensitized solar cells (DSSCs). The cells utilized similar phenothiazine-based dyes (HL5) as sensitizer with fixed concentration (0.3 mM) of co-adsorbents are fabricated to explore the effect on cell performances and interfacial charge properties. Power conversion efficiencies (PCEs) of 7.02–7.76% were achieved, which better than the commercially available CDCA co-adsorbent based cell (6.71% ± 0.14%). In addition, the highest conversion efficiency also reaches 95% of the standard cell based on N719 metal dye. Herein, several observations: (1) under various alkyl chain lengths closed to anchor, the longest one has efficient charge recombination; (2) under various alkyl chain lengths in the periphery, the moderate one has the best interfacial properties with the longest electron lifetime value; (3) under different generations, the largest one can reduce dye aggregation and charge recombination significantly. Based on our pervious initial study on dendritic co-adsorbents, we further investigated several molecular design on dendritic co-adsorbents to realize the structural effect on cell performance that might be useful for DSSC applications.
KW - Alkyl chain lengths
KW - Dendritic co-adsorbents
KW - Dye-sensitized solar cells
KW - Generations
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U2 - 10.1016/j.synthmet.2021.116711
DO - 10.1016/j.synthmet.2021.116711
M3 - Article
AN - SCOPUS:85099839713
VL - 274
JO - Synthetic Metals
JF - Synthetic Metals
SN - 0379-6779
M1 - 116711
ER -