高稳定性纳米Y-TiOPc的制备及其应用性能研究

Research on Preparation of Highly Stable Nano Y-TiOPc and Its Application Performance

纳米Y型酞菁氧钛(Y-TiOPc)在600~900 nm范围具有很强的光吸收特性,因此在光电转换材料与器件方面具有非常可期待的应用。Y-晶型不稳定,易转化成稳定但光电响应性差的β-晶型,从而导致材料和器件性能劣化。因此,高稳定性Y-TiOPc纳米材料的绿色制备方法和高性能器件研究是有机光电领域的重要问题之一。以三氟乙酸溶解TiOPc,将得到的溶液滴加到0℃的乙醇溶液中;然后,在剪切速度为900 r/min的强剪切作用下形成的1,2-二氯乙烷/水微乳液中(此时微乳液的温度为30℃),调节析出沉淀晶型2 h,得到纳米Y-TiOPc。得到的Y-TiOPc的平均粒径为2.86 nm,结晶度93.82%,且在丁酮/环己酮体系中超声波或球磨分散作用4 h后晶型保持稳定,以其制备的分散液静置30 d后的透射率变化率为0.53%。将制得的纳米Y-TiOPc作为载流子产生材料制备有机光导器件,其对780 nm激光的响应性能为:V 0=-878.89 V,R d=-12.10 V/s,V r=-14.65 V,E 1/2=0.17μJ/cm^(2)。因此,本工作介绍了一种制备高性能Y-TiOPc纳米材料的有效方法。

Nano Y-type titanyl phthalocyanine(Y-TiOPc)has received substantial attention in photoelectric conversion materials and devices,because it possesses strong light absorption in the range of 600~900 nm.However,the green preparation of Y-TiOPc with high stability is still a great challenge,because Y-type crystal is unstable and easy to be converted into stableβ-type crystal,resulting in poor photoelectric response.Herein,we reported an efficient strategy to fabricate highly stable nano Y-TiOPc.In this work,TiOPc was dissolved in trifluoroacetic acid,and the obtained solution was dropped into ethanol solution at 0℃.Afterwards,adding to the 1,2-C2H4Cl2/H2O microemulsion formed under strong shear at the shearing speed of 900 rmp,the precipitates was adjusted at 30℃for 2 h to obtain highly stable nano Y-TiOPc.As a result,the average crystal size of Y-TiOPc is 2.86 nm and the crystallinity of Y-TiOPc is 93.82%.In addition,the crystal exhibits a stable crystalline type in the Methyl Ethyl Ketone/Cyclohexanone system after ultrasonic or ball milling dispersion for 4 h.And,the transmittance variation of the dispersion prepared with Y-TiOPc reaches 0.53%after 30 d.The response properties of organic photoconductivity device using Y-TiOPc as carriers generating material shows the V 0 of-878.89 V,R d of-12.10 V/s,V r of-14.65 V,and E 1/2 of 0.17μJ/cm^(2) with excitation of 780 nm laser.This work provides an effective method for achieving Y-TiOPc nanomaterials with excellent performance.