Premium
Front Cover: Solar RRL 1∕2017
Author(s) -
Pruzan Dennis S.,
Caruso Anna E.,
Liu Yijin,
Lin Yu,
Beall Carolyn,
Repins Ingrid,
Toney Michael F.,
Scarpulla Michael A.
Publication year - 2017
Publication title -
solar rrl
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201770001
Subject(s) - kesterite , materials science , chalcopyrite , crystallite , crystallography , yield (engineering) , solar cell , optoelectronics , chemistry , copper , metallurgy , czts
Despite large research efforts and the materials sharing similar crystalline and electronic structures, the open circuit voltages ( V oc ) of kesterite Cu 2 ZnSn(S,Se) 4 based solar cells have remained well below those of chalcopyrite Cu(In,Ga)Se 2 based cells. Pruzan et al. (article no. 1600024 ) use element‐specific transmission X‐ray microscopy tomography with resolution of <200 nm to characterize elemental fluctuations in >100 μm 3 volumes of Cu 2 ZnSnSe 4 . Anticorrelation in the concentrations of Cu and Zn is found on the scale of polycrystalline grains, proving that disorder exists on length scales much larger than point defects. These results yield unique insight into the origins of composition and thus the electronic structure inhomogeneity and V oc deficit in kesterite devices.