Rodriguez-Osorio Karina G, Morán-Lázaro Juan P, Ojeda-Martínez Miguel, Montoya De Los Santos Isaac, Ouarie Nassima El, Feddi El Mustapha, Pérez Laura M, Laroze David, Routray Soumyaranjan, Sánchez-Rodríguez Fernando J, Courel Maykel
Centro Universitario de los Valles, Universidad de Guadalajara, Carretera Guadalajara-Ameca Km. 45.5, Ameca C.P. 46600, Jalisco, Mexico.
Instituto de Estudios de la Energía, Universidad del Istmo, Santo Domingo Tehuantepec C.P. 70760, Oaxaca, Mexico.
Nanomaterials (Basel). 2023 Jul 12;13(14):2058. doi: 10.3390/nano13142058.
In this work, we present a theoretical study on the use of CuZnSn(S,Se) quantum wells in CuZnSnS solar cells to enhance device efficiency. The role of different well thickness, number, and S/(S + Se) composition values is evaluated. The physical mechanisms governing the optoelectronic parameters are analyzed. The behavior of solar cells based on CuZnSn(S,Se) without quantum wells is also considered for comparison. CuZnSn(S,Se) quantum wells with a thickness lower than 50 nm present the formation of discretized eigenstates which play a fundamental role in absorption and recombination processes. Results show that well thickness plays a more important role than well number. We found that the use of wells with thicknesses higher than 20 nm allow for better efficiencies than those obtained for a device without nanostructures. A record efficiency of 37.5% is achieved when 36 wells with a width of 50 nm are used, considering an S/(S + Se) well compositional ratio of 0.25.
