Contributo in volume, 2018, CPE

Innovative photocathodes based on Nanodiamond layers

L. Velardi1, V. Nassisi1, L. Monteduro1, A.P. Caricato1, G. Cicala2

1Laboratorio di Elettronica Applicata e Strumentazione LEAS, INFN, Department of Physics, University of Salento - Lecce, Italy 2P.LAS.M.I. Lab @ CNR-NANOTEC, Via Amendola 122/D, 70126 Bari - Italy

Two different photocathodes (PCs) based on nanodiamonds (NDs) have been realized at the MWPECVD Laboratory of CNR-NANOTEC of Bari. Each PC consisted of layers of untreated or hydrogenated ND particles of 250 nm deposited on p-doped silicon substrate by means of pulsed spray technique. The quantum efficiency (QE) of the cathodes has been assessed at the UV wavelength of a KrF laser i.e. 248 nm. The laser energy used for the irradiation ranged from 10-3 to 10-2 J/cm2. The ND photocathodes exhibited QE values higher than those shown by conventional Cu ones

Keywords

laser, nanodiamond particles, photocathode

CNR authors

Cicala Grazia

CNR institutes

NANOTEC – Istituto di Nanotecnologia