查看文章

Bulk-heterojunction (BHJ) solar cells based on phase-separated blends of organic materials of donor and acceptor (fullerene derivative) have been in continuous development over the past two decades.[1–8] Recently, solution-processable small moleculebased BHJ solar cells exhibiting comparable power conversion efficiency of near 8% to the polymers with high potential under simple and optimized processing conditions.[9–13] The smallmolecule donors have attractive features, including relatively simple synthesis and purification steps, mono-dispersity, and improved batch-to-batch reproducibility.[14] Indium tin oxide (ITO) substrates have been widely used for BHJ solar cells because of their high transparency and excellent conductivity. There are several promising transparent conducting oxides (TCOs) that may replace ITO, having potentially better properties for use as anode materials and in order to …