Preparation and Performance Research of CuInSe<sub>2</sub> Materials Applied in Solar Cell

Abstract

At present, CuInSe 2 (referred to as CIS) semiconductor has become one of the hot points in solar cell field at home and abroad for its excellent performances, such as direct bandgap, high light absorption coefficient, high photoelectric conversion efficiency and long-term stability. In this paper, the CIS bulk materials are prepared by the horizontal Bridgman method with double-heat sources, the crystal structure, microstructure morphology and composition of the samples are analyzed in X-ray diffraction instrument (XRD) and scanning electronic microscope (SEM) with Energy Dispersive X-ray Spectrum (EDX), and surface electrical state and electrical properties of the samples are characterized in X-ray photoelectron spectroscopy (XPS) and four point resistivity test system. The results show that the CIS crystal was grown, and that the conductive performance of the samples is good which display the characteristics of p-type semiconductor. Furthermore, a thin film CIS sample was obtained by argon ion-beam scanning bombardment, and it has high solar energy absorptivity and the bandgap of 0.99 eV analyzed in Ultraviolet-visible Spectrum that is suitable for solar cell.

Facile Preparation of Wurtzite CuInE2 (E = S, Se) Nanoparticles Under Solvothermal Conditions

“…The conversion of molecular metal-chalcogenolate complexes and small clusters has proven to be a highly effective method for the formation of metal-chalcogenide extended solids, − thin films, as well as nanoscale materials. ,, This includes works by Williams et al (photolysis) and Castro et al and Banger et al (thermolysis), who have demonstrated that the mixed-metal [(Ph 3 P) 2 ­CuIn­(ER) 4 ] (E = S, Se) can be used as molecular precursors to the related ternary nanomaterials CuInE 2 , taking advantage of the well-defined Cu:In:S ratio. Indeed, Castro and co-workers investigated in detail their decomposition to tetragonal CuInS 2 in noncoordinating, high boiling solvents where size selective preparation was achieved.…”