Determination of Quasi-Fermi-Level Separation in High-Efficiency Organic Solar Cells by Transient Luminescence Measurements

Nanoscale spatial and time-resolved mapping in perovskite and organic solar cells: a multimodal technique to visualize the photoinduced charge dynamics

“…Photoluminescence (PL) spectroscopy provides information about the radiative recombination processes and the efficiency of charge carrier generation in active materials. [18][19][20] Transient absorption spectroscopy (TAS) allows for the study of excited states and charge carrier dynamics by monitoring changes in the absorption of the material following photoexcitation. [20][21][22] Some recently deployed techniques to evaluate multiple nanoscale properties simultaneously in OSC and PSC devices are termed as multimodal techniques.…”

“…[18][19][20] Transient absorption spectroscopy (TAS) allows for the study of excited states and charge carrier dynamics by monitoring changes in the absorption of the material following photoexcitation. [20][21][22] Some recently deployed techniques to evaluate multiple nanoscale properties simultaneously in OSC and PSC devices are termed as multimodal techniques. 23,24 Such techniques include transmission electron microscopy (TEM) 25,26 and photoinduced force microscopy (PiFM) [27][28][29][30] etc., with their multiple testing modes to evaluate the structure-property-function and performance relationships among the common and complex parameters over nanoscales.…”