App Note: Sensitive EQE Characterization for Solar Cell and Photodetector Devices
An efficient new approach to sEQE spectroscopy
In this application note, we demonstrate a new approach to sensitive external quantum efficiency (sEQE) characterization as a means to measuring the lowest EQE values possible for organic solar cell and photodetector technology research. We specifically discuss:
- Conventional instrumentation used for an sEQE measurement
- The alternate approach, which employs a synchronous source measure system set up to perform DC I-V sweeps and lock-in detection of a device's induced AC photocurrent
- The results of an sEQE measurement performed on a C60:ZnPc organic solar cell device using our M81-SSM platform
Looking beyond sEQE measurements?
The SMU‑10 for our M81‑SSM system offers an integrated lock‑in, resistance measurements up to 100 GΩ, and synchronous source and measure functionality in a single module capable of sourcing and sinking current while measuring DC + AC voltages. With <3 nV/<1 fA AC sensitivity at 1 kHz, the SMU‑10 is ideal for I‑V load/efficiency characterization of photovoltaic structures, including next‑generation perovskite and 2D-based photovoltaic devices that require enhanced signal range and precision.
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Lake Shore Cryotronics is a leading innovator in solutions for measurement over a wide range of temperature and magnetic field conditions. We are committed to our customers’ advancement of science and technology to benefit humanity.
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