N-型可溶性七併環戊二烯併二噻吩有機光電材料之開發

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題名:	N-型可溶性七併環戊二烯併二噻吩有機光電材料之開發
作者:	潘俊瑝;Pan, Chun-Huang
貢獻者:	化學學系
關鍵詞:	有機光伏打電池;鈣鈦礦太陽能電池;添加劑;Organic Photovoltaics;Perovskite Solar Cells
日期:	2022-07-28
上傳時間:	2022-10-04 10:59:31 (UTC+8)
出版者:	國立中央大學
摘要:	本研究主要以DCDTT （dicyclopentadithienothiophene）為新核心開發數種有機光電材料。透過於結構末端上修飾不同的拉電子分子團，如二氰乙烯基（dicyanovinyl）與異位溴化之茚酮（brominated indanone），以調控材料能階，製備出4 種小分子材料：INBr2-DCDTT（1）、Gamma-INBr-DCDTT（2）、Delta-INBr-DCDTT（3）與 DCV-DCDTT（4）。　　本研究所開發之材料主要作為非富勒烯受體（non-fullerene acceptors, NFAs）應用於有機太陽能電池的主要吸光層，亦將應用於鈣鈦礦太陽能電池（perovskite solar cells, PSCs）作為添加劑使用。目前INBr2-DCDTT 作為鈣鈦礦太陽能電池製程中反溶劑之添加劑，能有效提升電池元件效能從原先17 %提升至20.59 %，相關成果已於2022 年4 月發表至Journal of Materials Chemistry A。　　由於Gamma-INBr-DCDTT（2）、Delta-INBr-DCDTT（3）兩材料末端具單溴基，恰可作為高分子的其中一個單體單元。此兩材料除探討溴代位置對材料性能的影響，更能做為未來開發高分子光電材料的新單體。這些新材料皆完成NMR 與質譜之結構鑒定，利用UV-Vis 及DPV 測量其光學及電化學性質如HOMO、LUMO 與Eg，再以 DSC及 TGA 證實此材料的高熱穩定性。這些新開發的有機光電材料正進行相關元件測試，期望有良好的效能表現。 ;A series of new organic optoelectronic materials based on dicyclopentadithienothiophene (DCDTT) were developed and characterized for the applications in organic photovoltaics (OPVs). Highly fused thiophene-based seven-ring core (DCDTT) was end-capped with various electron-withdrawing groups, such as brominated dicyanomethylene indanones (INBr2, -INBr, and -INBr) and dicyanovinyl (DCV), via Knoevenagel condensation to obtain new final compounds, INBr2-DCDTT (1), -INBr-DCDTT (2), -INBr-DCDTT (3), and DCV-DCDTT (4), respectively. These newly developed compounds are expected to perform well as non-fullerene acceptors in OPVs as well as in perovskite solar cells (PSCs). The power conversion efficiency of the reported INBr2-DCDTT-based perovskite film has been raised from 17% to 21.39% in PSCs. The presence of carbonyl (C=O) and cyano (C≡N) groups have a good interaction with undercoordinated Pb2 ions and passivate the trap states in the perovskite films; thus, it enhances charge transport at the device interface. The related study has been published on Journal of Materials Chemistry A in April, 2022. The chemical structures of these newly developed materials were characterized by NMR spectroscopy and mass spectrometry. Further, the optical properties of these compounds were investigated by UV-Vis spectroscopy, electrochemical analyses were analyzed by DPV, and the thermal stabilities were determined by DSC and TGA. Optoelectronic devices made from these newly developed small molecules are under optimization.
顯示於類別:	[化學研究所] 博碩士論文

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