Editing Quantum efficiency (section)

===EQE mapping===
Conventional measurement of the EQE will give the efficiency of the overall device. However it is often useful to have a map of the EQE over large area of the device. This mapping provides an efficient way to visualize the homogeneity and/or the defects in the sample. It was realized by researchers from the Institute of Researcher and Development on Photovoltaic Energy (IRDEP) who calculated the EQE mapping from electroluminescence measurements taken with a [[hyperspectral]] imager.<ref>{{cite journal |author=Delamarre |editor2-first=Jean-Francois |editor2-last=Guillemoles |editor1-first=Alexandre |editor1-last=Freundlich |display-authors=etal  |title=Evaluation of micrometer scale lateral fluctuations of transport properties in CIGS solar cells |journal=Proc. SPIE  |series=Physics, Simulation, and Photonic Engineering of Photovoltaic Devices II |volume=100 |date=2013 |page=862009 | doi=10.1117/12.2004323 |bibcode=2013SPIE.8620E..09D | s2cid=120825849 }}</ref><ref>{{cite journal |author=A. Delamarre |display-authors=etal |title=Quantitative luminescence mapping of Cu(In,Ga)Se<sub>2</sub> thin-film solar cells |journal=Progress in Photovoltaics |date=2014 |volume=23 |issue=10 |pages=1305–1312 | doi=10.1002/pip.2555|s2cid=98472503 }}</ref>