https://scholars.lib.ntu.edu.tw/handle/123456789/577201
標題: | Dendritic-based co-adsorbents for dye-sensitized solar cells: Effect of the generations and alkyl chain lengths | 作者: | Tseng Y.-H Li C.-T Huang G.-W Chen Y.-C Jeng R.-J Dai S.A. RU-JONG JENG |
關鍵字: | Chain length; Conversion efficiency; Efficiency; Alkyl chain lengths; Charge recombinations; Convergent synthesis; Diethylenetriamine; Interfacial charge; Interfacial property; Power conversion efficiencies; Ring opening reaction; Dye-sensitized solar cells | 公開日期: | 2021 | 卷: | 274 | 來源出版物: | Synthetic Metals | 摘要: | 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. ? 2021 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099839713&doi=10.1016%2fj.synthmet.2021.116711&partnerID=40&md5=f580b18bf60fb472c32fcdd04bffdc6c https://scholars.lib.ntu.edu.tw/handle/123456789/577201 |
ISSN: | 3796779 | DOI: | 10.1016/j.synthmet.2021.116711 |
顯示於: | 高分子科學與工程學研究所 |
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