Abstract
Poly(amido amine) (PAMAM, generation 2), a solution-processable dendrimer, is used as the electron-collection interlayer on indium tin oxide (ITO) for inverted polymer solar cells (PSCs) with poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester as the active materials. The inverted PSCs exhibited a power conversion efficiency of 3.53% under AM1.5G illumination, which is significantly higher than that of the control inverted PSCs with blank ITO and comparable to that of the control PSCs with normal architecture. The high-performance of the inverted PSCs is attributed to the reduction of the work function of ITO by 0.75 eV by PAMAM.
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