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Alcohol soluble titanium(IV) oxide bis(2,4-pentanedionate) as electron collection layer for efficient inverted polymer solar cells
Wang, Fuzhi
Xu, Qi
Tan, Zhan'
ao
Qian, Deping
Ding, Yuqin
Li, Liangjie
Li, Shusheng
Li, Yongfang
Organic Electronics, 13(11), pp 2429-2435, 2012-11
Summary
We demonstrate efficient inverted polymer solar cells (PSCs) based on poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C-61-butyric acid methyl ester (PCBM) by using solution-processed titanium(IV) oxide bis(2,4-pentanedionate) (TOPD) as electron collection layer (ECL) between the indium tin oxide (ITO) electrode and photoactive layer. The TOPD buffer layer was prepared by spin-coating isopropanol solution of TOPD on ITO and then baked at 140 degrees C for 5 min. The power conversion efficiency (PCE) of the inverted PSC with TOPD buffer layer reaches 4% under the illumination of AM1.5G, 100 mW/cm(2), which is increased by 76% in comparison with that (2.27%) of the inverted device without TOPD ECL. The results indicate that TOPD is a promising electron collection layer for inverted PSCs.
Keywords
Titanium(IV)oxide bis(2,4-pentanedionate); Polymer solar cells; Electron collection layer
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