SPECIAL ISSUE ON THE ASIAN SYMPOSIUM ON NANOTECHNOLOGY AND NANOSCIENCE 2002 (ASIANANO 2002); EDITED BY MASATSUGU SHIMOMURA AND TERUYA ISHIHARANo Access

PHOTOBRIGHTENING AND PHOTODARKENING IN CdSe NANOCRYSTAL/POLYMER THIN FILMS

HARUMI ASAMI

Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan

Mitsubishi Chemical Corporation, 1000 Kamoshida-cho, Aoba-ku, Yokohama, 227-8502, Japan

The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan

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ITARU KAMIYA

Mitsubishi Chemical Corporation, 1000 Kamoshida-cho, Aoba-ku, Yokohama, 227-8502, Japan

The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan

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MASAHIKO HARA

Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan

The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan

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https://doi.org/10.1142/S0219581X02000814Cited by:4 (Source: Crossref)

Abstract

The change in the photoluminescence intensity of CdSe nanocrystal/polymer thin films with duration of illumination is investigated. The choice of polymer has an influence on photobrightening and photodarkening. In particular, photodarkening in CdSe nanocrystal/poly(vinyl carbazole) thin film occurs immediately upon illumination, in contrast to the slow changes observed with polystyrene and poly(2-vinylpridine). We discuss the mechanisms of this phenomenon in comparison with interaction between surface of CdSe nanocrystals and polymer side chain.

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