Interfacial electronic structure of copper hexadecafluorophthalocyanine and phthalocyanatotin (IV) dichloride studied by photoemission spectroscopy

Haibo Wang; Zengtao Liu; Tsz Wai Ng; Ming Fai Lo; Chun-Sing Lee; Yan, Donghang; Lee, Shuit-Tong
April 2010
Applied Physics Letters;4/26/2010, Vol. 96 Issue 17, p173303
Academic Journal
We investigated the interfacial electronic structure of the n-n isotype organic heterojunction formed between copper hexadecafluorophthalocyanine (F16CuPc) and phthalocyanatotin (IV) dichloride (SnCl2Pc) using ultraviolet and x-ray photoemission spectroscopies. Energy level bending was observed at the heterojunction interface due to the formation of an electron accumulation region in the F16CuPc layer and an electron depletion region in the SnCl2Pc layer. The formation of organic heterojunction was explained by charge exchange at the interface due to their different work functions.


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