Author/Authors :
Hiromitsu، نويسنده , , Ichiro and Kawami، نويسنده , , Ayana and Tanaka، نويسنده , , Senku and Morito، نويسنده , , Shigekazu and Sasai، نويسنده , , Ryo and Ikeue، نويسنده , , Takahisa and Fujita، نويسنده , , Yasuhisa and Handa، نويسنده , , Makoto، نويسنده ,
Abstract :
Photoluminescence (PL) properties of meso-tetraphenylporphine-4, 4′, 4″, 4‴-tetracarboxylic acid (H2TPP(COOH)4) bound to ZnO nanoparticle were studied. With 1.2 H2TPP(COOH)4 molecules per ZnO particle, the PL intensity of H2TPP(COOH)4 with a 325 nm excitation was increased to a 3.2-times larger value by the conjugate formation with ZnO. The excitation spectrum of PL gave an evidence of an emission of H2TPP(COOH)4 by an energy transfer from ZnO. An analysis based on the Förster theory gave a reasonable value of 1.8 nm for the average distance between H2TPP(COOH)4 and emissive surface defects on the ZnO particle.
