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| 題名: | High-Performance Organic Materials for Dye-Sensitized Solar Cells: Triarylene-Linked Dyads with a 4-tert-Butylphenylamine Donor |
| 作者: | Chang, YJ (Chang, Yuan Jay)
Chou, PT (Chou, Po-Ting)
Lin, SY (Lin, Szu-Yu)
Watanabe, M (Watanabe, Motonori)
Liu, ZQ (Liu, Zhi-Qian)
Lin, JL (Lin, Ju-Ling)
Chen, KY (Chen, Kew-Yu)
Sun, SS (Sun, Shih-Sheng)
Liu, CY (Liu, Ching-Yang)
Chow, TJ (Chow, Tahsin J.) |
| 貢獻者: | Dept Appl Chem |
| 關鍵詞: | carbazoles
dyads
organic materials
solar cells
triarylenes |
| 日期: | 2012-03 |
| 上傳時間: | 2013-02-22 14:01:12 (UTC+8) |
| 摘要: | A series of organic dyes were prepared that displayed remarkable solar-to-energy conversion efficiencies in dye-sensitized solar cells (DSSCs). These dyes are composed of a 4-tert-butylphenylamine donor group (D), a cyanoacrylic-acid acceptor group (A), and a phenylene-thiophene-phenylene (PSP) spacer group, forming a D-p-A system. A dye containing a bulky tert-butylphenylene-substituted carbazole (CB) donor group showed the highest performance, with an overall conversion efficiency of 6.70?%. The performance of the device was correlated to the structural features of the donor groups; that is, the presence of a tert-butyl group can not only enhance the electron-donating ability of the donor, but can also suppress intermolecular aggregation. A typical device made with the CB-PSP dye afforded a maximum photon-to-current conversion efficiency (IPCE) of 80?% in the region 400480 nm, a short-circuit photocurrent density Jsc=14.63 mA?cm-2, an open-circuit photovoltage Voc=0.685 V, and a fill factor FF=0.67. When chenodeoxycholic acid (CDCA) was used as a co-absorbent, the open-circuit voltage of CB-PSP was elevated significantly, yet the overall performance decreased by 1618?%. This result indicated that the presence of 4-tert-butylphenyl substituents can effectively inhibit self-aggregation, even without CDCA. |
| 關聯: | CHEMISTRY-AN ASIAN JOURNAL 卷: 7 期: 3 頁數: 572-581 |
| 顯示於類別: | [化學系所] 期刊論文
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