Lattice Dynamics of Cu₂ZnSn(S _x ,Se_1-x )₄ Kesterite Thin-Film Solar Cells Studied by Nuclear Inelastic Scattering.

ABSTRACT: Phonons play a crucial role in thermalization and non-radiative recombination losses in semiconductors, impacting the power conversion efficiency of solar cells. To shed light on the lattice dynamics in Cu₂ZnSn(S _x ,Se_1-x )₄ (CZTSSe) thin-film solar cells and validate the extensive number of theoretical studies, we determine the ¹¹⁹Sn-partial phonon density of states (Sn-PDOS) by nuclear inelastic X-ray scattering. CZTSSe-based devices, one with near-stoichiometric and two with off-stoichiometric compositions, are investigated, and the results are correlated with the corresponding power conversion efficiencies (PCEs) of 3.2, 7.6, and 10.6%, respectively. Compared to the near-stoichiometric cell, the main Sn-PDOS peak of t

SUBMITTER: Edla R 

PROVIDER: S-EPMC11493056 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature