在本篇研究當中，我們使用了製備以及純化條件簡單的吲哚并咔唑作為電洞傳輸材料的核心結構，並且，我們使用布赫瓦爾德-哈特維希胺化反應以及直接碳氫鍵芳香環化，製備出了三種系列的新型電洞傳輸材料分別為LLA01-06、LinLi01-10、LinLi12-15；更要的是，本篇研究透過引入：(1) π架橋以及(2)氟原子等新分子設計策略，嘗試對材料進行改質，並預計將所合成出的分子材料應用於鈣鈦礦太陽能電池中的電洞傳輸層，觀察其光電性質的表現。 ;Searching for alternative energy sources has become a very important and popular topic currently, Among the many alternative energy sources, green energy is renewable and environmentally-friendly advantages. In the field of green energy, solar cells, which are not restricted by regions, are the most popular and most promising projects.
Indolocarbazole has been studied by many teams due to its biological activity. However, because its structure with good planarity and rich electron density, many research groups have tried to apply Indolocarbazole in optoelectronic materials. So far, indolocarbazole has been applied in many optoelectronic materials. However, there are only two reports describing the use of indolo[3,2-b]carbazole (ICZ) as hole transporting materials (HTM) in perovskite solar cells.
Herein, we synthesized several types of new ICZ-based small molecules(LLA01-06; LinLi01-10) via direct C-H/C-Br coupling reactions. Additionally, this work also attempted to introduce π-bridge and fluorine into ICZ-based HTM, aiming to further improve the performance. Up to date, we successfully obtained LinLi04 exhibiting an outstanding power conversion efficiency (PCE) up to 16.7 % without any oxidation treatment.
