A high work function anode interfacial layer via mild temperature thermal decomposition of a C60F36 thin film on ITO

作者：Mao Hong Ying^*; Wang Rui; Zhong Jian Qiang; Zhong Shu; Lin Jia Dan; Wang Xi Zu; Chen Zhi Kuan; Chen Wei

来源：Journal of Materials Chemistry C, 2013, 1(7): 1491-1499.

DOI：10.1039/c2tc00110a

A high work function anode interfacial layer has been developed via a mild temperature thermal decomposition of fluorinated fullerene (C60F36) on ITO at 120 degrees C. As revealed by in situ ultraviolet photoelectron spectroscopy (UPS) measurements, after the interfacial modification, the ITO electrode work function can be as high as similar to 5.62 eV. It also possesses very good air stability even after the exposure to air for more than one day. The thermal annealing induced carbon-fluorine bond breaking was confirmed by in situ X-ray photoelectron spectroscopy (XPS) measurements. The residual F atoms are chemically bonded onto the ITO surface. Taking advantage of such a high work function anode interfacial layer on ITO, enhanced performance of a chloroaluminium phthalocyanine (ClAlPc)/fullerene (C-60) planar heterojunction based organic solar cell was observed. The performance enhancement is attributed to the higher anode WF together with the optimal nanoscale morphology, and hence better hole collection efficiency.

• 出版日期2013