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  • 學位論文

濕式製程整塊異質接面與蕭基接面有機小分子太陽能電池

Solution-Processed Bulk Heterojunction and Schottky Junction Small Molecule Organic Solar Cells

指導教授 : 林皓武
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摘要


本篇論文研究濕式製程整塊異質接面與蕭基接面有機小分子太陽能電池元件結構與特性。 第一章部分,簡介近代太陽能電池的發展,並且概述有機小分子太陽能電池的發展,接著再對有機高分子太陽能電池做一系列的回顧。 第二章部分,概述太陽能電池的元件特性與有機小分子太陽能電池的運作原理以及元件結構,接著介紹有機材料的準備與分析,以及元件的製作流程,最後為元件量測方法。 第三章部分,我們使用 donor-acceptor-acceptor (D-A-A) 分子結構型態的新型有機材料以及C70或PC71BM作為整塊異質接面元件中的donor與acceptor。使用旋轉塗佈法或是刮刀塗佈法製作主動層,並藉由調控比例改善元件的整塊異質接面結構。 第四章部分,我們使用A-A-D-A-A分子結構型態的有機BODIPY小分子材料以及PC71BM製作整塊異質接面反結構元件,在優化元件後,其最佳表現開路電壓為0.99 V,短路電流為8.3 mA/cm2,填充因子為0.40,效率達3.3%。 第五章部分,我們開發以小分子donor嫁接氧化石墨烯的donor材料,並搭配C70製作有機太陽能電池,其最佳表現開路電壓0.72 V,短路電流8.6 mA/cm2,填充因子0.43,效率2.7%,為目前以氧化石墨烯為主動層材料之太陽能電池中,轉換效率最高的元件。 第六章部分,我們利用刮刀塗佈法實現低donor濃度有機蕭基接面元件,並藉由濕式製程慣用的共溶劑手法,進一步提升元件效率,其最佳表現開路電壓0.86 V,短路電流12.6 mA/cm2,填充因子0.48,效率高達5.2%。

並列摘要


In this thesis, we focus on the fabrication and characterization of solution-processed bulk heterojunction and Schottky junction small molecule organic solar cells (SMOSCs). In the first chapter, we briefly review the development of modern photovoltaics, expecially the history of SMOSCs and polymer solar cells. In the second chapter, the operation principles and characteristics of organic solar cells are described, followed by the details of material analysis, device fabrication, and characteristics measurements. In the third part of the thesis, we have studied a series of tailor-made compounds with donor-acceptor-acceptor (D-A-A) molecular structures as donor materials for solution-processed SMOSCs. Spin-coated and blade-coated devices were fabricated and the performance of the devices were further improved by manipulating the donor:acceptor blend ratios. In the fourth chapter, a series of organic A-A-D-A-A compound as donor material has been studied. Solution-processed inverted bulk heterojunction cells were fabricated from the blends of the donors and PC71BM. The opitimized cells showed VOC of 0.99 V, JSC of 8.3 mA/cm2, FF of 0.40, and efficiency up to 3.3%. In the penultimate chapter, we demonstrate a series of small molecule-grafted graphenes as donor material for solution-processed SMOSCs. The opitimized cells showed VOC of 0.72 V, JSC of 8.6 mA/cm2, FF of 0.43, and efficiency as high as 2.7%. This efficiency is among the highest ever reported for organic solar cells based on graphene derivatives as solar active materials. In the last chapter, the solution-processed C70-based organic Schottky junction devices have been fabricated using blade-coating technique. We adopted the co-solvent method in our blade-coated organic Schottky junction devices and the opitimized cells which showed VOC of 0.86 V, JSC of 12.6 mA/cm2, FF of 0.48, and efficiency as high as 5.2% were demostrated.

並列關鍵字

無資料

參考文獻


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