| 摘要: | 本篇論文是以四苯基乙烯 ( tetraphenylethene, TPE ) 作為核心，開發出一系列的電子傳輸層料材料 (electron transporting materials, ETM)，應用於鉛鈣鈦礦太陽能電池。
本研究在TPE的末端接上一系列不同的拉電子基團 (electron-withdrawing group, EWG) : 五氟苯 (pentafluorobenzene, FP)、 3,5-雙三氟甲基苯 (3,5-bis(trifluoromethyl)benzene, MFP) 、甲腈 (nitrile, CN) 及硝基 (nitro, NO2)，成功合成出 TFP-TPE (1)、TFMP-TPE (2) 、TPE-CN (3) 及TPE-NO2 (4) 四種材料。
作為核心之TPE除了合成步驟簡單外，苯環與中心的雙鍵結構具有良好的π-π 作用力，使材料在製成元件時能夠更好的堆疊，提升分子間電荷傳輸能力。其中， TFP-TPE (1) 有進一步的得到晶體，可以更深入的了解到分子內之二面角，與分子間的堆疊情況。
以上材料皆使用NMR與質譜之結構鑒定，並利用DPV及UV-Vis測量其光學及電化學性質，再以TGA及DSC確認此材料的熱穩定性。四種材料所製成的元件效率初步測試具有不錯的效能，其中一材料之效能已超過20%，期望後續優化能有進一步地提升。
;This study describes the development of a series of electron
transporting materials (ETMs) for application in lead perovskite solar cells (Pb-PSCs). Tetraphenylethene (TPE) was used as a core, while various electron-withdrawing groups (EWGs), such as pentafluorobenzene (FP), 3,5-bis(trifluoromethyl)benzene (FMP), nitrile (CN), and nitro (NO2) were tetra-coupled to the TPE, resulting in the successful synthesis of four materials: TFP-TPE (1), TFMP-TPE (2), TPE-CN (3), and TPE-NO2 (4).
TPE core was synthesized using a simple synthetic route and
exhibits strong π-π interactions between the phenyl rings and the central double bond. These interactions facilitate better stacking of the molecules during device fabrication and enhance intermolecular charge transfer capabilities. Additionally, the single crystal structure of TFP-TPE (1) was grown, allowing for a deeper understanding of its structural properties.
The chemical structures of these materials were confirmed using NMR and mass spectrometry, while their optical and electrochemical properties were characterized via DPV and UV-Vis measurements. Thermal stability was verified by TGA and DSC. Preliminary efficiency tests of Pb-based PSC devices fabricated with these four materials showed promising results. Among them, TFP-TPE (1) achieves over 20% efficiency. Further optimization is expected to enhance efficiency. |
