Cu₂ZnSnS₄absorber layers deposited by spray pyrolysis for advanced photovoltaic technology

Abstract

In this work, pneumatic spray pyrolysis was used to deposit Cu2ZnSnS4 kesterite thin film layers onto soda lime glass substrates/Mo coated substrates (substrate configuration). Furthermore, pneumatic spray pyrolysis was also tested as a potential way to grow kesterite thin film layers on ZnO nanorod arrays on SnO2:F coated glass substrates (superstrate cell configuration). In this case semi‐transparent samples were obtained. A summary of the process parameters optimization to effectively coat the ZnO nanostructures is presented. In both solar cell configurations, absorbers were selenized at 400–500 °C and compared. For the substrate configuration, we present a device with a power conversion efficiency of 1.86%, Voc = 292 mV, Jsc = 16.2 mA/cm2 and FF = 39.6%. (a) Cross‐sectional SEM image of ZnO nanorods covered by Cu2ZnSn(S1–xSex)4 in a superstrate configuration, (b) layout of the conceptual idea.

Perchlorate-Induced Doping of Electrodeposited ZnO Films for Optoelectronic Applications

“…The spectrum of ZnO nanorods (NR) has been also added in order to show the impact of the material morphology on the Raman response. 24 The resonant Raman spectrum (under UV excitation wavelength) of the single crystal is characterized by an intense band at 574 cm −1 assigned to A 1 (LO) mode and its second order 25,26 at ∼1150 cm −1 . Additionally, weaker peaks at 333 and 439 cm −1 , assigned to multiphonon (MP) and E 2 high modes, respectively, 25,26 are observed.…”

A deep look into the spray coating process in real-time—the crucial role of x-rays

“…Espindola-Rodríguez et al [403] filled successfully an array of upright ZnO nanorods for advanced photovoltaic technology for the first time with Cu 2 ZnSnS 4 (CZTS) thin films, using pneumatic spray pyrolysis. The nanorod structure capture light via diffused reflections in such an array and thus are beneficial for SCs.…”