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

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