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Báo cáo hóa học: " Photoelectric Properties of Silicon Nanocrystals/P3HT BulkHeterojunction Ordered in Titanium Dioxide Nanotube Arrays"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Photoelectric Properties of Silicon Nanocrystals/P3HT BulkHeterojunction Ordered in Titanium Dioxide Nanotube Arrays | Nanoscale Res Lett 2009 4 1389-1394 DOI 10.1007 s11671-009-9410-y NANO EXPRESS Photoelectric Properties of Silicon Nanocrystals P3HT Bulk- Heterojunction Ordered in Titanium Dioxide Nanotube Arrays Vladimir Svrcek Ivan Turkevych Michio Kondo Received 24 June 2009 Accepted 5 August 2009 Published online 18 August 2009 to the authors 2009 Abstract A silicon nanocrystals Si-ncs conjugated-polymer-based bulk-heterojunction represents a promising approach for low-cost hybrid solar cells. In this contribution the bulk-heterojunction is based on Si-ncs prepared by electrochemical etching and poly 3-hexylthiophene P3HT polymer. Photoelectric properties in parallel and vertical device-like configuration were investigated. Electronic interaction between the polymer and surfactant-free Si-ncs is achieved. Temperature-dependent photoluminescence and transport properties were studied and the ratio between the photo- and dark-conductivity of 1.7 was achieved at ambient conditions. Furthermore the porous titanium dioxide TiO2 nanotubes template was used for vertical order of photosensitive Si-ncs P3HT-based blend. The anodization of titanium foil in ethylene glycol-based electrolyte containing fluoride ions and subsequent thermal annealing were used to prepare anatase TiO2 nanotube arrays. The arrays with nanotube inner diameter of 90 and 50 nm were used for vertical ordering of the Si-ncs P3HT bulk-heterojunction. Keywords Silicon nanocrystals Bulk heterojunction Titanium dioxide nanotubes Introduction Most of the solar cells installed today are made of silicon. The vision is to produce solar cells from cheap materials in V. Svrcek El I. Turkevych M. Kondo Research Center for Photovoltaics National Institute of Advanced Industrial Science and Technology AIST Central 2 Umezono 1-1-1 Tsukuba 305-8568 Japan e-mail vladimir.svrcek@aist.go.jp low-cost processes thus resulting in lower cost electricity production. It is believed that bulk-heterojunction solar cells made of from .