Ultra-photosensitive Y-type titanylphthalocyanine nanocrystals: Preparation and photoelectric properties

作者：Li, Xiaolong; Xiao, Yin; Wang, Shirong; Li, Xianggao

来源：Dyes and Pigments, 2016, 125: 44-53.

DOI：10.1016/j.dyepig.2015.09.035

• Microemulsion phase transfer method
• Ultrasmall Y-TiOPc NCs
• Solvent-stabilized dispersibility
• Photosensitivity
• Photoactive materials
• High charge-mass ratio

A microemulsion phase transfer method was developed to prepare Y-type titanylphthalocyanine nanocrystals (Y-TiOPc NCs) with an average diameter of 2.3 +/- 0.8 nm. The purification and crystal transformation of TiOPc could be achieved in the one-step process by establishing a stable H2O/omicron-dichlorbenzene microemulsion at high shear rate. The photoelectric characteristics of the ultrasmall Y-TiOPc NCs were evaluated by acting as the photoactive materials in organic photoreceptors, which afforded an impressive photosensitivity of E-1/2 = 0.064 mu J/cm(2). The dispersion of the Y-TiOPc NCs in a solution of polyvinyl butyral, methylethylketone and cyclohexanone (PVB/MEK/CYC) showed excellent dispersibility (zeta potential: -50.0 mV) at least 60 days and suffered no photoelectric penalty. The excellent solvent-stabilized dispersibility mainly relied on electrostatic repulsion force resulting from the high charge-mass ratio due to ultrasmall particle size.

• 出版日期2016-2
• 单位天津大学