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Electronic Properties of Particle-Counting Diamonds. I. Photoconductivity

L. A. Vermeulen and F. R. N. Nabarro
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
Vol. 262, No. 1126 (Oct. 6, 1967), pp. 251-276
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/73442
Page Count: 26
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Electronic Properties of Particle-Counting Diamonds. I. Photoconductivity
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Abstract

An account is given of an experimental investigation into the photoconductivity of particle-counting diamonds at room temperature and at 80 °K. Photoconduction spectra were obtained in the range 2500 to 200 nm which are typical of type Ia diamonds. The room temperature spectra are characterized by a system of eight photoconduction peaks. The peaks are attributed to the intrinsic absorption, the thermal decomposition of excitons and the excitation of three levels in the forbidden energy gap at 0· 85, 1· 45 and 2· 2 eV from the valence band. This model is consistent with the known electro-optical properties of type Ia diamonds. The model is formulated mathematically and formally shown to predict the observed photoconduction responses of the diamonds to certain characteristic illuminations.

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