@article {Nakamura2019Cdfree, title = {Cd-Free Cu(In,Ga)(Se,S)2 Thin-Film Solar Cell With Record Efficiency of 23.35\%}, journal = {IEEE Journal of Photovoltaics}, volume = {9}, year = {2019}, pages = {1863-1867}, doi = {10.1109/JPHOTOV.2019.2937218}, url = {https://ieeexplore-ieee-org.udel.idm.oclc.org/document/8825469/authors$\#$authors}, author = {M. Nakamura and K. Yamaguchi and Y. Kimoto and Y. Yasaki and T. Kato and H. Sugimoto} }