Assembly of individual TiO2-C-60/porphyrin hybrid nanoparticles for enhancement of photoconversion efficiency

作者：Jang Jae Kwon^*; Park Se Ho; Kim Chulwoo; Ko Jaejung; Seo Won Seok; Song Hyunjoon; Park Joon T

来源：Nanotechnology, 2011, 22(27): 275720.

DOI：10.1088/0957-4484/22/27/275720

Rational organization of porphyrin and C-60 on the electrode surface in photovoltaic structures is essential to yield high quantum efficiency. In the present work, individual TiO2 nanoparticles were modified by introducing C-60 and porphyrin units on the surface, and then electrophoretically deposited on an ITO/SnO2 electrode. The morphology of the photoactive layer on the electrode was significantly different from that of the layer produced as a result of separate deposition of C-60 and porphyrin. The maximum incident photon to current efficiency of the resulting electrode approached 88% at 410 nm, which is the highest value among molecule-based photovoltaic cells reported to date. This indicates that molecular assembly of the C-60 and porphyrin units on the individual nanoparticles through strong chemical attachment is a key factor in improving effective electron transfer between the photoactive units and the electrodes.

• 出版日期2011-7-8