Department of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 541, FI-33101, Tampere, Finland.
Phys Chem Chem Phys. 2012 Mar 14;14(10):3498-504. doi: 10.1039/c2cp24022j. Epub 2012 Feb 3.
In this study double linked porphyrin-fullerene and phthalocyanine-fullerene dyads and a single linked phthalocyanine-fullerene dyad were studied as components in inverted organic solar cells (OSCs) equipped with the well known P3HT:PCBM bulk heterojunction as the photoactive layer. The dyad monolayers were deposited onto a surface of P3HT:PCBM by using the Langmuir-Schäfer method, therefore forming oriented monolayers in which the electron donor (D) and the acceptor (A) exist as a close proximity pair in a 1:1 molar ratio. As a result of this structure short circuit current density (J(sc)), open circuit voltage (V(oc)), and power conversion efficiency (η) increased, while the fill factor (FF) remained the same. The devices which contained dyads with double linkage produced higher efficiencies than the one with a single linked dyad. This result can be explained in terms of molecular orientation. It was also verified that the prepared OSC devices have promising long term air stability.
在这项研究中，双连接卟啉富勒烯和酞菁富勒烯偶联物以及单连接酞菁富勒烯偶联物被研究作为倒置有机太阳能电池（OSC）的组件，其配备了众所周知的 P3HT：PCBM 体异质结作为光活性层。偶联物单层通过使用 Langmuir-Schäfer 方法沉积在 P3HT：PCBM 的表面上，因此形成了取向的单层，其中电子供体（D）和受体（A）以 1：1 摩尔比存在紧密接近对。由于这种结构，短路电流密度（J(sc)）、开路电压（V(oc)）和功率转换效率（η）增加，而填充因子（FF）保持不变。具有双连接的偶联物的器件比具有单连接偶联物的器件产生更高的效率。这一结果可以根据分子取向来解释。还验证了所制备的 OSC 器件具有有前途的长期空气稳定性。
