| 摘要: | 近幾年來，有機材料的太陽能電池，如染料敏化太陽能電池 (DSSCs)、有機光伏 (OPVs) 和鈣鈦礦太陽能電池 (PSCs)，其發展受到了廣泛的關注和重視。尤其又以鈣鈦礦太陽能電池作為當今一種備受矚目的新型太陽能電池，隨著科學家們的不懈努力下，其能量轉換效率在 2009 年至 2023 年的短短十幾年間從最初的約 3.9% 提升至 26.0%，展現出巨大的潛力。在提高鈣鈦礦太陽能電池元件性能方面，電洞傳輸材料起著不可或缺的重要作用。
本篇研究旨在合成兩個不同系列的電洞傳輸材料。第一系列的分子設計主要是以 Phthalimide 作為 Acceptor，通過在 Phthalimide 的間位連接兩個 Triphenylamine 作為 Donor，並分別接上具有不同官能基的長烷基作為錨定基團，從而合成出具有 D-A 結構的 PA 系列分子。第二系列的分子設計主要是以不同的雜環芳基作為中心分子 Acceptor，並通過連接 β-二酮作為延伸核心的 π-共軛，接著在兩端接上 Triphenylamine 作為 Donor，從而合成出具有 D-A-D 結構的 DK 系列分子。將這兩種系列的化合物作為電洞傳輸材料應用於反式鈣鈦礦太陽能電池中。;In recent years, organic materials-based solar cells, such as dye-sensitized solar cells (DSSCs), organic photovoltaics (OPVs), and perovskite solar cells (PSCs), have garnered widespread attention and importance in the field of renewable energy research. Among these, perovskite solar cells have emerged as a highly promising and sought-after new generation of solar cells. The continuous efforts of scientists have resulted in a remarkable increase in their energy conversion efficiency from approximately 3.9% in 2009 to an impressive 26.0% by 2023, showcasing their immense potential as a viable alternative for clean energy production.
Crucial to enhancing the performance of perovskite solar cells are hole-transporting materials, which play an indispensable role in facilitating efficient charge transport and extraction within the device structure. To this end, the current research endeavors to design and synthesize two distinct series of hole-transporting materials.
The first series focuses on utilizing Phthalimide as the acceptor moiety, strategically connected to two Triphenylamine donor groups via the meta position of Phthalimide. Additionally, long alkyl chains with diverse functional groups are employed as anchoring units to optimize the molecular structure. The resultant PA series molecules possess a donor-acceptor (D-A) architecture, specifically tailored to enhance charge mobility and facilitate hole transfer in perovskite solar cells.
On the other hand, the second series is designed around different heteroaromatic groups serving as the central acceptor unit. These acceptor units are conjugated with a β-diketone core, providing extended π-conjugation to enhance electronic communication. Triphenylamine is introduced at both ends of the molecular structure as the donor. The synthesized DK series molecules exhibit a donor-acceptor-donor (D-A-D) configuration, optimized to facilitate efficient charge transfer and transport within the perovskite solar cell architecture.
Both series of compounds are subsequently evaluated as hole-transporting materials in inverted perovskite solar cells. The comprehensive investigation aims to determine the impact of the molecular design and structural modifications on the photovoltaic performance and stability of the devices.
This research strives to contribute to the ongoing development and improvement of perovskite solar cells, potentially opening up new avenues for harnessing solar energy with enhanced efficiency and sustainability. As the world endeavors to transition towards clean and renewable energy sources, the quest for more efficient and stable photovoltaic technologies has become increasingly vital, and the development of advanced hole-transporting materials is at the forefront of these efforts. |
