We note that the highest EQE LSC ðlÞ (acquired at the smallest d value) in the position-dependent EQE spectra should be used in Equation 4 to ensure the whole EQE series can satisfy the photon balance.
ConclusionLuminescent solar concentrators provide a compelling alternative to PVs and TPVs due to their structural simplicity, low cost, high defect tolerance, and selective harvesting tunability. However, there has been substantial confusion about the best practices for characterization and performance reporting. Fundamentally, LSCs are photovoltaic systems and should therefore provide similar reporting metrics including PCE and EQE. In this work, standard protocols to characterize the performance of LSCs are provided with a particular emphasis on the simplification and challenges of performing J-V and EQE measurements. Key parameters to evaluate the visible transparency and aesthetic quality of LSC devices are outlined by using several TLSC examples. In addition, methods for confirming the self-consistency of LSC data are described. We reemphasize that all reports on LSCs should provide independent measurements of PCE, EQE LSC ðlÞ, TðlÞ, RðlÞ, and QY for data completeness and show self-consistency checks to minimize potential experimental errors. In addition, AVT, light utilization efficiency (LUE), and (a*, b*) should be reported to so that aesthetics can be quantitatively compared. We expect the standardization of reporting LSC devices will ultimately help these devices advance in a sustainable, reliable, and repeatable way.