Understanding Device Performance Limiting Factors by Reproducing The Current-Voltage Characteristics from Transient Optoelectrical Measurements

Pushing the performance of the solar cell to the theoretical limit is the matter of better understanding the charge dynamics from the absorber to the complete device and laying the direction for device/material engineering. Here we study the charge dynamics on a set of bulk heterojunction organic solar cells with/o incorporating semiconducting single-walled carbon nanotubes into the absorber layer. Employing nano-microsecond transient optoelectrical characterization techniques along with femtosecond transient absorption spectroscopy and reproducing the steady-state current-voltage characteristics of the device from the parameter extracted from the transient optoelectrical measurements, we demonstrate that the cost-effective optoelectrical techniques capable of determining the performance limiting factors of the devices under operational conditions.