Fast Light Intensity Transients System
An option which makes your CIMPS system fit for the investigation of fast kinetics in organic, dye sensitized and monolitic SC as well as OLEDs, OLECS, photosensors etc. ...
It is often advantageous, when linear dynamic measurements under frequency variation, like IMPS and IMVS can be put in relation to measurements of transient behaviour in the time domain. Slower photo-electrochemical systems, like DSSC or inorganic photo-catalytic systems can be evaluated successfully with the standard CIMPS function “Intensity Transients”.
For faster processes happening for instance in silicon based or other monolithic types of semiconductor solar cells, and, due to their thin layer structure also in organic solar cells, the time resolution of the standard CIMPS “Intensity Transients” is not sufficient. Photo-charge diffusion and migration time constants in such objects may occur at timescales in the upper region or even beyond that, what can be covered by CIMPS. As a solution, Zahner offers a fast intensity transients option, which extends the timescale resolution some orders of magnitudes down to 50ns.
CIMPS-fit uses the fast two-channel transient recorder TR8M plug-in from Zahner, which can be taken in general applications using its external inputs. Besides, the TR8M can communicate with the internal potentiostat of the Zennium/IM6 and with slave potentiostats connected externally via an EPC40 in an optimal manner by automatic, software controlled signal routing.
This feature is the base for CIMPS-fit: the slave potentiostat, active in CIMPS controlling the lightsource intensity is set to perform fast transients, while the main potentiostat controls the cell and acquires cell voltage respectively cell current. The signals are internally routed to the TR8M. By this, light switching time constants of typically 400ns (off-transient) respectively 1us (on transient) can be achieved. If necessary, CIMPS-fit may be extended optionally by a special external potentiostat-front-end and a fast light-off circuit, enabling switch-off transients with a time constant of typically less than 80ns.
- photocurrent response on fast light transients
- photovoltage response on fast light transients
CIMPS add-on option for fast intensity transient measurements
Requirements: Basic CIMPS system