| Summary: | 碩士 === 國立清華大學 === 工程與系統科學系 === 103 === This work separated into two parts, both of them improved from the structure of black dye (N749).
In part I, here reports a new series of panchromatic Ru(II) terpyridine sensitizers which possess thienyl functionalized isoquinoline pyrazolate chelates, along with tridentate terpyridine anchor and monodentate thiocyanate ligand. The 2-dodecylthienyl substituent was modified at various sites of isoquinoline moiety. These new sensitizers exhibit significantly higher molar extinction coefficients at 400-800 nm versus N749 reference complex, leading better light-harvesting capability across visible and near infrared region (NIR), giving a superior performance to DSC cells.
In part II, A series of bis-tridentate and thiocyanate-free Ru(II) sensitizers with high stability were designed. Tridentate ligands were substituted for three thiocyanate ligands, which not only avoided thiocyanate linkage isomerism to increase the yield but also enhanced the lifespan of as-fabricated solar cell device. Different from previous extended-conjugation structure, here attached small alkyl groups to azolate chelates to reduce synthesis process and cost, leading to more opportunities for commercial application. Moreover, different alky-substituted tridentate chelates showed different device performance. At last, the stability test and synthesis cost analysis has been done.
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