Fine-Tuning by Triple Bond of Carbazole Derivative Dyes to Obtain High Efficiency for Dye-Sensitized Solar Cells with Copper Electrolyte
发表时间：2020-12-29
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- 论文类型：
- 期刊论文
- 第一作者：
- An, Jincheng
- 通讯作者：
- 杨希川,Cai, Bin,Zhang, Li,Yang, Kaiyuan,于泽,Wang, Xiuna,Hagfeldt, Anders,Sun, Licheng
- 发表时间：
- 2020-10-14
- 发表刊物：
- ACS APPLIED MATERIALS & INTERFACES
- 文献类型：
- J
- 卷号：
- 12
- 期号：
- 41
- 页面范围：
- 46397-46405
- ISSN号：
- 1944-8244
- 关键字：
- dye-sensitized solar cell; carbazole derivative; organic sensitizers; copper electrolyte; organic sensitizers
- 摘要：
- Three novel dyes consisting of a 5,8,15-tris(2-ethylhexyl)-8,15-dihydro-SH-benzo[1,2-b:3,4-b':6,5-b '']tricarbazole (BTC) electron-donating group and a 4,7-bis(4-hexylthiophen-2-yl)benzo[c][1,2,5]thiadiazole (BTBT) pi-bridge with an anchoring group of phenyl carboxyl acid were synthesized and applied in dye-sensitized solar cells (DSCs).The AJ202 did not contain any triple bonds, the AJ201's ethynyl group was inserted between the BTC and BTBT units, and the AJ206's ethynyl group was introduced between the BTBT moiety and the anchor group. The inclusion and position of the ethynyl linkage in the sensitizer molecules significantly altered the electrochemical properties of these dyes, which can fine-tune the energy levels of the dyes. The best performing devices contained AJ206 as a sensitizer and a Cu(I/II) redox couple, which resulted in a power conversion efficiency (PCE) up to 10.8% under the standard AM 1.5 G illumination, which obtained PCEs higher than those from the devices that contained AJ201 (9.2%) and AJ202 (9.7%) under the same conditions. The highest occupied molecular orbital and lowest unoccupied molecular orbital levels of the sensitizers were tuned to be well-suited for the Cu(I/II) redox potential and the Fermi level of TiO2. The innovative synthesis of a tricarbazole-based donor moiety in a sensitizer used in combination with a Cu(I/II) redox couple has resulted in relatively high PCEs.
- 是否译文：
- 否
