Linnenbank, HSaliba, MGui, LLMetzger, BTikhodeev, SGKadro, JNasti, GAbate, AHagfeldt, AGraetzel, MGiessen, H2018-11-082018-11-082018-11-08201810.1364/OME.8.000511https://infoscience.epfl.ch/handle/20.500.14299/151056WOS:000426437500003Temperature dependent two-photon photoluminescence of CH3NH3PbBr3: structural phase and exciton to free carrier transitiontext::journal::journal article::research article