Green, M. A.Taouk, M.Blakers, A. W.Narayanan, S.Zhao, JianhuaCampbell, P.2026-01-042026-01-040003-6951ORCID:/0000-0002-0800-2276/work/162946164https://hdl.handle.net/1885/733803585Significant improvements are reported in the energy conversion efficiency of low resistivity silicon solar cells when measured under concentrated sunlight. These improvements result primarily from increased short-circuit current density due to the use of a microgrooved cell structure with obliquely transversing metallization fingers. Peak efficiencies are 23.6% at 100 suns concentration with values up to 22.7% maintained at 273 suns concentration.2en198610.1063/1.971670041877409