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Title: Optical spectroscopic study of n-type diamond
Authors: NESLADEK, Milos 
MEYKENS, Kristien 
STALS, Lambert 
KOIZUMI, Satoshi
TERAJI, Tokuyuki
Issue Date: 1999
Source: BANDO, Y. (Ed.) Proceedings of the 6th NIRIM International Symposium on Advanced Materials (ISAM '99).
Abstract: Preparation of n-type diamond has been one of the challenges in the diamond field, not successful in the past. Recently the group at NIRIM has succeeded in deposition of thin n-type P-doped CVD diamond films. Hall effect measurements confirmed n-type conductivity with the activation energy of the carrier concentration of 0.40-0.60 eV. Here, we present the first spectroscopic study of the phosphorus optical activity in diamond, using the constant photocurrent method [3] (CPM) and an optical absorption technique - photothermal deflection spectroscopy (PDS) [4]. Two new optically active defects are detected in the gap of P-doped CVD diamond: the first at about 0.56 eV (denoted as XP1) and the second one at about 0.81 eV (denoted as XP2) of the optical excitation energy. Additionally, at liquid-He temperature, a phonon-induced oscillatory photoconductivity is observed, allowing to estimate the position of P-excited states.
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ISBN: 4-944122-04-7
Type: Proceedings Paper
Appears in Collections:Research publications

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