Abstract: TZ101 and TZ102,two kinds of new sensitizers,are designed and synthesized based on indolo [2,3-b] carbazole as electron donors.Two sensitizers share almost the same structure except two fluorine atoms are inserted into the benzothiatriazole (BTZ) group of TZ101.Effects of fluorine atoms on the sensitizer and the photoelectric performance for dye sensitized solar cells (DSSCs) are investigated by UV-Vis absorbance spectra,electrochemical analysis,and density functional theory calculation (DFT).It is shown that the addition of fluorine atoms increases the molar extinction coefficient of TZ101 and the incident photon-to-electron conversion efficiency (IPCE) of DSSCs in the range from 350 nm to 450 nm,which leads to an improved photocurrent.The open-circuit voltage (Voc) of DSSCs based on TZ101 and TZ102 both reaches 1.1 V because the energy level matching between donor and electrolyte is realized due to the addition of indolo [2,3-b] carbazole.Finally,the device based on TZ101 achieves a power conversion efficiency of 5.1%,which is higher than the 4.7% of that based on TZ102.
田志峰, 安金成, 杨希川. 氟原子对二聚咔唑类光敏染料在染料敏化太阳能电池中的影响[J]. 现代化工, 2021, 41(2): 86-91.
TIAN Zhi-feng, AN Jin-cheng, YANG Xi-chuan. Effect of fluorine atoms on dimeric carbazole-based photosensitive dyes in dye-sensitized solar cells. Modern Chemical Industry, 2021, 41(2): 86-91.
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