How can I measure CZTS charge diffusion length?

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Stéphane Bourdais

You can try by SSPG technique on CZTS film (on insulating substrate) or by EBIC technique on a CZTS solar cell (in cross section) or a recent method by IBM suitable to a whole CZTS device also; see Gokmen et al J Appl Phys 2013;114(11) 114511.

Manuel Schnabel

Apparently you can use time-resolved PL, provided CZTS luminesces and that a certain sample set can be prepared, see Stranks et al., Science 342 (6156): 341-344

https://www-herz.physics.ox.ac.uk/publications/Stranks13a.pdf