含苯並[f]並三唑之 D-π-A共軛型光敏染料及其染敏太陽能電池

2H-Naphtho[2,3-d][1,2,3]triazole Containing D-π-A Conjugated Organic Dyes for Dye-Sensitized Solar Cells

徐瑞苓(JUI-LING HSU)

指導教授 ： 嚴詠聖

中原大學/理學院/化學研究所/碩士(2020年)

https://doi.org/10.6840/cycu202000257

摘要

光敏染料NTz-3−NTz-5使用三種不同的共軛橋梁(π‒linkers)增加平面性設計染料，做為光敏化太陽能電池(DSSCs)的染料，分子結構以D-π-A′-π-A模式組成，是由arylamine當作電子的提供者(donor)，cyanoacrylic acid當作電子的接收者(acceptor)，而缺電子的NTz作為輔助電子受體(auxiliary acceptor)可以與不同共軛橋梁(π‒linkers)連接。結果顯示這三種染料均在可見光區有強光捕捉能力(> 40000 M−1 cm−1)，可能因為donor-acceptor之間的強電荷轉移(charge transfer)。在標準AM1.5G照明下，這些染料的電池表現出5.85%至6.91%的轉換效率。與共吸附劑CDCA共吸附後，由NTz-5染料製成的DSSC元件的染料，其轉換率為7.17%，是染料N719的標準細胞元件的95%。

關鍵字

含苯並[f]並三唑 ； 有機光敏劑 ； 染敏太陽能電池 ； D–π–A′–π–A ； 有機染料

並列摘要

Three metal-free dyes (NTz-3−NTz-5) with a D-π-A′-π-A architecture comprising an arylamine as the electron donor, a cyanoacrylic acid as electron acceptor, and an electron deficient naphtho[2,3-d][1,2,3]triazole (NTz) entity in the conjugated spacer with various π linkers, were developed and used as the sensitizers in dye-sensitized solar cells (DSSCs). The results indicate that all of the three dyes exhibit strong light-capturing ability in the visible region and obtain relatively high molar extinction coefficients (> 40000 M−1 cm−1) due to their strong charge transfer (CT) from donor to acceptor. Under standard global AM 1.5 G illumination, the cell photovoltaic performance from these dyes exhibited conversion efficiencies ranging from 5.85% and 6.91%. After coadsorbed with CDCA, the DSSCs based on NTz-5 dyes gives 7.17%, which is about 95% of the N719-based standard cell.

並列關鍵字

dye-sensitized solar cells ； organic sensitizer ； 2H-Naphtho[2,3-d][1,2,3]triazole ； D–π–A′–π–A ； organic dye

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