CIMPS-abs.pdf

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CIMPS-abs -4- 4. Trouble shooting __________________________ 27 4.1. CIMPS Actuator ..........................................................................27 4.2. ILT 9x0.........................................................................................28
CIMPS-abs -5- 1. Introduction CIMPS-abs was designed to integrate light absorption spectroscopy and general spectroelectrochemical measurements into the service of the Thales-Zennium system environment. A wideband spectrometer together with an appropriate light source extends CIMPS for that purpose. High precision spectroscopy is enabled by means of a electro-mechanical slide, which supports the automatic change between the measurement cell and a reference cell in the optical path between light source and spectrometer head. CIMPS-abs is established as standard with a spectrometer allowing wideband spectroscopy between 250nm and 950nm with 1nm resolution. On request, different spectrometer configurations are available. Both a high-power LED as well as a tungsten lamp can be ordered as standard. The high-power LED has the advantage of low power consumption and arbitrarily variable intensity and it can be used in normal CIMPS applications as well. The tungsten light source in turn has a significantly wider spectral range and higher absolute power. The unique CIMPS feedback principle, active also in the case of the tungsten light source, provides fast settling time and high long-term stability. Thus, the tungsten light source can be activated and deactivated automatically in long term measurement campaigns, saving energy and avoiding unwanted heat up. Besides of manually triggered spectra, automatic series of absorption spectra in dependency of electrochemical parameters can be run in single sweep, cyclic, or vs. time. Core applications of CIMPS-abs are investigations on electro-chromic processes and the characterization of polymers suitable for organic solar cells and light emitting devices. The CIMPS-abs set-up includes the spectral resolved emission spectroscopy service CIMPS-emit. Please refer to the CIMPS-emit manual for further information on this feature. CIMPS-abs comes up as a plug & play application fully calibrated and established with the exemplary comfort of Thales: spectral data can be analyzed with the on-board package “light spectra analysis”, spectral data files are covered by the preview-support of the Windows® file explorer and can be exported in manifold way as high-quality vector graphic, bitmap and ASCII data list. Online-viewing and export is possible, while measurements are still running and context-sensitive online help is supported. |impedance| / Ω 0.6 -100 mV 100K 0.5 +575 mV 30K extinction → 0.4 0.3 +675 mV +750 mV 10K 3K 1K +350 mV 0 mV 0.2 300 0.1 100 +750 mV 0 400 500 600 700 800 900 wavelength / nm → 30 100m 1 3 10 30 100 1K 3K 10K frequency / Hz → Fig. 1 A typical application example for CIMPS-abs: Extinction spectra series vs. cell voltage referenced to Ag/AgCl 3m-NaCl of a P3HT-PEDOT:PSS film in Acetonitrile / TBA-PF 6 (left hand side) and the corresponding impedance spectra (right hand side).
Page 1 and 2: Photo-Electrochemical Transmittance
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