| 摘要: | 本論文主要為有機光伏電池 (OPVs) 的材料開發。本研究成功開發出一系列之非富勒烯受體 (non fullerene acceptor, NFA) 材料，以雙噻吩醯亞胺 (bithiophene-imide, BTI) 為核心，先接上環戊烷二噻吩(cyclopentadithiophene, CDT) 作為 -spacer，再外接四種不同拉電子單元：茚酮 (indanone, IN)、二氯茚酮 (dichlorodicyanomethylene indanone, INCl)、二溴茚酮 (dibromodicyanomethylene indanone, INBr) 與二氰乙烯基 (dicyanovinyl, DCV)，製備出 IN-CDT-BTI-b20 (1)、INCl-CDT-BTI-b20 (2)、INBr-CDT-BTI-b20 (3) 與 DCV-CDT-BTI-b20 (4)等四個化合物。
BTI 為具有強拉電子基團醯亞胺的缺電子受體單元，且有較高的分子平面性和良好的溶解度，預期此核心與多併環噻吩搭配而成之九環結構有助於電荷傳遞。之後於此核心接上具氯、溴等鹵素之末端基團，對材料之能階及UV-vis吸收進行調控。
材料已藉由 DPV 及 UV-Vis 測定其電化學及光學性能 (HOMO/LUMO 與Eg)，並透過 TGA 及 DSC 檢測其熱穩定性，新開發之四種 NFA 材料將會應用於有機光伏電池 (OPV) 及鈣鈦礦太陽能電池 (PSC)。;A new series of bithiophene-imide (BTI) -based organic photoelectronic materials were synthesized and characterized for the applications in organic photovoltaic cells (OPVs).
With high molecular planarity and solubility, BTI were used as central units and coupled with cyclopentadithiophene (CDT) to develop new conjugated cores CDT-BTI. Then, the new nine-ring system was end-capped with various electron-withdrawing groups, such as dicyanomethylene indanone (IN), dichlorodicyanomethylene indanone (INCl), dibromodicyanomethylene indanone (INBr) and dicyanovinyl (DCV), via Knoevenagel condensation, yielding four new compounds, IN-CDT-BTI-b20 (1), INCl-CDT-BTI-b20 (2), INBr-CDT-BTI-b20 (3), and DCV-CDT-BTI-b20 (4), respectively. In addition to the application in OPV, these newly developed non-fullerene acceptors could also be used as passivating agents in PSCs based on our recent studies.
The optical and electrochemical properties (HOMO and LUMO) of these newly synthesized compounds were characterized by UV-vis and DPV. Thermal properties were investigated by DSC and TGA. Currently, optoelectronic devices based on these newly developed organic photoelectronic materials are under examination and optimization. |
