用于有机太阳能电池的新的基于3，3 '-（乙烷-1，2-二亚基）双（吲哚啉-2-酮）（EBI）的小分子半导体
New 3,3'-(ethane-1, 2-diylidene)bis(indolin-2-one) (EBI)-based small molecule semiconductors for organic solar cells
摘要：
以3，3 '-（1，2-二亚乙基）二吲哚啉酮（EBI）为电子受体结构单元，配以噻吩、联噻吩和苯并呋喃为电子给体封端基团，合成并表征了一系列D-A-D结构的小分子化合物.当稠环苯并呋喃结合到EBI（EBI-BF）时，分子显示出完美的平面构象，并在这些EBI化合物中提供最好的电荷传输性能，空穴迁移率高达0.021 cm 2 V-1 s-1。所有基于EBI的小分子与PC61 BM受体一起用作供体材料，用于制造溶液处理的本体异质结（BHJ）太阳能电池。性能最好的光伏器件是基于使用联噻吩封端部分（EBI-2 T）的EBI衍生物，其最大功率转换效率（PCE）为1.92%，这是由于EBI-2 T的宽吸收光谱和BHJ的适当形态。为了建立分子结构和薄膜形态之间的相关性，对每种材料的纯膜和共混膜进行差示扫描量热法、原子力显微镜和X射线衍射分析。
英文摘要：
A series of donor-acceptor-donor (D-A-D) structured small-molecule compounds, with 3,3'-(ethane-1,2-diylidene)bis(indolin-2-one) (EBI) as a novel electron acceptor building block coupled with various electron donor end-capping moieties (thiophene, bithiophene and benzofuran), were synthesized and characterized. When the fused-ring benzofuran is combined to EBI (EBI-BF), the molecules displayed a perfectly planar conformation and afforded the best charge tranport properties among these EBI compounds with a hole mobility of up to 0.021 cm2 V-1 s-1. All EBI-based small molecules were used as donor material along with a PC61BM acceptor for the fabrication of solution-processed bulk-heterojunction (BHJ) solar cells. The best performing photovoltaic devices are based on the EBI derivative using the bithiophene end-capping moiety (EBI-2T) with a maximum power conversion efficiency (PCE) of 1.92%, owing to the broad absorption spectra of EBI-2T and the appropriate morphology of the BHJ. With the aim of establishing a correlation between the molecular structure and the thin film morphology, differential scanning calorimetry, atomic force microscopy and X-ray diffraction analysis were performed on neat and blend films of each material.
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