New features in space-charge-limited-photocurrent transients

Ion spectroscopy — A diamond characterization tool

“…A continuous shift of the 'cusp', which would indicate a decrease of the effective sample thickness with decreasing Q′ [3], is not supported for the case of increasing Q Bi (see dotted line at constant t-cusp), at least not in these measurements. Representing the single-carrier drift in the low-signal case, a 241 Am-α-signal (obtained at 400 V) is plotted in addition.…”

“…The interpretation of the measured TC signals according to [3,4] is limited by several assumptions non-applicable to our experiment. Instead of a homogeneous ionization profile through the whole diamond bulk, as provided by relativistic HIs, strongly absorbed UV light is used as injecting source, which decreases exponentially behind the blocking contacts.…”

“…Instead of a homogeneous ionization profile through the whole diamond bulk, as provided by relativistic HIs, strongly absorbed UV light is used as injecting source, which decreases exponentially behind the blocking contacts. Furthermore, the theory [2][3][4] refers usually to pindiode structures, where single-carrier drift is assumed. If the case of dual-carrier drift is treated [3], significantly lower mobility of minority carriers is implemented, which is not correct for diamond [10].…”

“…Furthermore, the theory [2][3][4] refers usually to pindiode structures, where single-carrier drift is assumed. If the case of dual-carrier drift is treated [3], significantly lower mobility of minority carriers is implemented, which is not correct for diamond [10]. It is also not clear if the variation of Q Bi at constant Q G , as performed in the present study, is compatible to the variation of the charge injection Q G at constant bias.…”

“…Original transient current (TC) signals, generated by primary 132 Xe projectiles of 215 MeV/amu kinetic energy in SC-DDs readout in 'current mode', are discussed in Section 4. An attempt is made to compare the experimental transients with theoretical SCLC data [2][3][4] as well as with simulated signals.…”