Jpn. J. Appl. Phys. 20 (1981) pp. 1671-1674  |Next Article|  |Table of Contents|
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Mechanism of Spectral Sensitization of ZnO Coadsorbing p-Type and n-Type Dyes

Tetsuzo Yoshimura, Kohei Kiyota, Hiroo Ueda and Masao Tanaka

(Received November 20, 1980; accepted for publication June 20, 1981)

We systematically measured photocurrents in ZnO layers coadsorbing p- and n-type dye. On the basis of our results, the mechanism of the spectral sensitization arising from the combination of p- and n-type dyes is discussed. We found that the photocurrents are proportional to e^-ΔE/kT, where ΔE is the difference in energy between the conduction bands of the p- and n-type dyes. Our results lead us to believe that the “sensitization with two dyes” induced by combining the p- and n-type dyes, is caused by the injection of electrons from the n-type dye layer into the ZnO layer via the p-type dye layer over the barrier of ΔE.

URL: http://jjap.jsap.jp/link?JJAP/20/1671/
DOI: 10.1143/JJAP.20.1671

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