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Controlling Molecular Packing for Charge Transport in Organic Thin Films
Author(s) -
Li Liqiang,
Hu Wenping,
Fuchs Harald,
Chi Lifeng
Publication year - 2011
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201000021
Subject(s) - materials science , heterojunction , organic solar cell , organic semiconductor , molecule , optoelectronics , organic electronics , nanotechnology , thin film , chemical physics , chemical engineering , transistor , polymer , composite material , organic chemistry , chemistry , physics , quantum mechanics , voltage , engineering
Tuning of the packing mode , including the film morphology, molecular orientation, and phase state of chloroaluminum phthalocyanine (ClAlPc), is demonstrated, and yields optimal parallel and vertical channels for charge transport. On a pure SiO 2 surface, the ClAlPc molecules lie flat and grow in the Volmer–Weber mode, resulting in a cone‐array structure that is highly desirable for heterojunction organic solar cells and organic field emission. On an OTS‐modified surface, the ClAlPc molecules stand obliquely and Stranski–Krastanov growth of a continuous and flat film occurs, which is suitable for organic transistors.