Titanium suboxide as an optical spacer in polymer solar cells

作者：Anshuman Roy, Sung Heum Park, Sarah R. Cowan, Ming Hong Tong, Shinuk Cho, Kwanghee Lee, Alan J. Heeger · 发表于：Applied Physics Letters · 年份：2009 · DOI：10.1063/1.3159622 · 被引用次数：142 · 研究领域：Organic Electronics and Photovoltaics、Conducting polymers and applications、Organic Light-Emitting Diodes Research

The use of a layer of titanium suboxide (TiOx) between the bulk heterojunction (BHJ) thin film and the metal contact in “plastic” solar cell has been shown to increase both the short-circuit current and the fill factor. Using a combination of optical modeling and device experiments, we clarify the role of the TiOx layer as an optical spacer. For an appropriate choice of the BHJ thickness and composition, the TiOx layer can enhance the absorption within the active layer, thereby increasing the photocurrent and the power conversion efficiency.