Volatile Organic Compounds(VOCs) Sensing Properties of Thin Films Based on Copper phthalocyanine and Dilithium phthalocyanine Compounds

In this work, we report the effect on the volatole organic compounds(VOCs) sensing properties of Copper phthalocyanine(CoPc) and Dilithium phthalocyanine(DiLiPc) thin films onto alumina substrates. Use evaporation method and the spin-coated method for sensing device. The materials of metallophthalocyanine macrocyclic compound solutions blended with N,N`-diphenyl-N,N`-bis(1-naphthyl)-1,1`-biphenyl-4,4"-diamine and/or Poly[2-methoxy-5-(2`-ethylhexyloxy)-1,4-phenylenevinylene] solutions. The influence of the blended in with metallophthalocyanine macrocyclic compounds on the resistance have been measured and analyzed in five different volatole organic compounds. The following results were obtained: The AFM 3D image of thin films deposited on metallophthalocyanine macrocyclic compound shows that the surfaces roughness were about CuPc 4.1~14.3 nm(7.5~8.1%), DiLiPc 10.3~22.2 nm(7.9~11.5%). The resistances decreases upon increasing the concentration of vapor organic compounds to CuPc and DiLiPc thin films. That thin films blended Copper phthalocyanine(CoPc) and Dilithium phthalocyanine(DiLiPc) with N,N`-diphenyl-N,N`-bis(1-naphthyl)-1,1`-biphenyl-4,4"-diamine and/or Poly[2-methoxy--5-(2`-ethylhexyloxy)-1,4-phenylenevinylene]. The resistances of blended thin films with N,N`-diphenyl-N,N`-bis(1-naphthyl)-1,1`-biphenyl-4,4"-diamine and/or Poly[2-methoxy--5-(2`-ethylhexyloxy)-1,4-phenylenevinylene] decreases upon increasing the concentration of volatole organic compounds(VOCs) on DiLiPc than CuPc compound thin films.