The EL measurements were performed using an Andor SR-303i-B spectrometer equipped with a silicon (Si) (DU420A-BR-DD) and an indium–gallium–arsenide (InGaAs) (DU491A-1.7) detector. Voltage was supplied by a Keithley 2400 source meter and was typically 1 V. For some low signal devices, the voltage was raised up to 3 V in order to get enough EL response. To prevent device heating when the EL signal was measured in the near-IR, the voltage was pulsed for 90 s. The voltage used was the same throughout the entire spectrum (for the silicon and germanium detectors) and then the final continuous EL spectrum was obtained, after subtraction of the dark background signal.
Zhong Y., Causa’ M., Moore G.J., Krauspe P., Xiao B., Günther F., Kublitski J., Shivhare R., Benduhn J., BarOr E., Mukherjee S., Yallum K.M., Réhault J., Mannsfeld S.C., Neher D., Richter L.J., DeLongchamp D.M., Ortmann F., Vandewal K., Zhou E, & Banerji N. (2020). Sub-picosecond charge-transfer at near-zero driving force in polymer:non-fullerene acceptor blends and bilayers. Nature Communications, 11, 833.
Other organizations :
University of Bern, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Universidade Federal de São Carlos, Universidade de São Paulo, TU Dresden, University of Potsdam, Material Measurement Laboratory, National Institute of Standards and Technology, Hasselt University
Pulsing of voltage for 90 s to prevent device heating
dependent variables
EL (electroluminescence) response
control variables
Andor SR-303i-B spectrometer equipped with Si (DU420A-BR-DD) and InGaAs (DU491A-1.7) detectors
Voltage typically 1 V, and up to 3 V for low signal devices
Subtraction of dark background signal
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