D-π-A Type Phenothiazine Organic Dyes for Dye-Sensitized TiO2 Solar Cells

被引:3
|
作者
Chiu, Kuo Yuan [1 ]
Tseng, Zong-Liang [2 ]
Chen, Lung-Chien [2 ]
Shaw, Hsin [1 ]
Chen, Ching-Ju [2 ]
Chen, Yi-Chih [2 ]
Yang, Shun-Han [3 ]
Wu, Wen-Ti [3 ]
Su, Yuhlong Oliver [1 ]
机构
[1] Natl Chi Nan Univ, Dept Appl Chem, Nantou 545, Taiwan
[2] Natl Taipei Univ Technol, Dept Electroopt Engn, Taipei 106, Taiwan
[3] Acad Sinica, Inst Chem, 128,Sec 2,Acad Rd, Taipei 115, Taiwan
关键词
Phenothiazine; TiO2; DSSCs; ANTIMICROBIAL ACTIVITIES; CONVERSION-EFFICIENCY; CHARGE RECOMBINATION; A549; ACTIVITY; PERFORMANCE; NANOPARTICLES; ACCEPTOR; SYSTEMS; DESIGN; DONORS;
D O I
10.1166/sam.2018.3249
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Here, two phenothiazine (PTA) based D-pi-A organic dyes (TC6PTA and TEC6PTA) were prepared. Their optical, excitonic and electrochemical properties were investigated and their practical application in dye-sensitized solar cells (DSCs) was also demonstrated. The PTA bridge EDOT pi-conjugated moiety contributed to the broad absorption and low-energy lambda(max) of the UV/VIS spectra, resulting in a small energy gap. Comparison showed TEC6PTA to have a higher absorption coefficient and smaller optical bandgap than TC6PTA. However, the power conversion efficiency (PCE) of the TC6PTA based DSC was 7.55% (TEC6PTA was 4.79%), higher than that of the N719 based DSC. Femtosecond time-resolved photoluminescence data show the electron injection at the TC6PTA/TiO2 interface to be more efficient than that at the TEC6PTA/TiO2 interface, which explains the higher PCE of the TC6PTA based device, including both the higher open-circuit voltage (V-OC) and short-circuit current (J(SC)).
引用
收藏
页码:801 / 807
页数:7
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