Published

2017-01-01

Development of system for automatic measurement of transient photocurrent and thermally stimulated current

Desarrollo de un sistema para medición automática de fotocorriente transitoria y corriente estimulada térmicamente

Keywords:

TSC measurements, photoconductivity, Perovskites solar cells, virtual instrumentation, PID and PWM controlp (en)
Medición de corriente térmicamente estimulada, fotoconductividad, placas solares de perovskita, instrumentación virtual, control PID y PWM. (es)

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Authors

  • Asdrubal Antonio Ramirez Botero Universidad Nacional de Colombia
  • Gerardo Gordillo
This paper presents details of the design and implementation of a system for measuring of thermally stimulated current (TSC) and transient photocurrent (Iph), developed using the Virtual Instrumentation concept. For that we have used National Instrument hardware and the LabView® package as software. The system is controlled by a virtual instrument (VI) which includes facilities to perform measurements of photocurrent keeping the temperature of the sample and the pressure of the chamber of measurement controlled as well as  real time display of the Iph vs t and TSC vs T curves. The system was tested by performing transient photocurrent and TSC measurements on CH3NH3PbI3 thin films that are generally used as absorbent layer of solar cells. This type of characterization is very useful to get information of the  trapping and recombination processes that affect the transport properties of the devices.
Este trabajo presenta los detalles del diseño y la implementación de un sistema de medición de corriente termicamente estimulada (TSC, por sus siglas en inglés) y fotocorriente transitoria (Iph), desarrollado a partir del concepto de Instrumentación Virtual. Para esto, se ha utilizado el hardware de National Instrument y el paquete LabView® como software. El sistema está controlado por un instrumento virtual (VI, por sus siglas en inglés) que incluye instalaciones para realizar mediciones de fotocorriente manteniendo la temperatura de la muestra y la presión de la cámara de medida controlada, así como una visualización en tiempo real de las curvas Iph vs t y TSC vs T . El sistema se probó mediante la realización de fotocorrientes transitorias y mediciones de TSC en películas delgadas CH3NH3PbI3 que se utilizan, generalmente, como capa absorbente de células solares. Este tipo de caracterización es muy útil para obtener información de los procesos de captura y recombinación que afectan las propiedades de transporte de los dispositivos.

References

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Copyright (c) 2017 Asdrubal Antonio Ramirez Botero, Gerardo Gordillo

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