Enhanced Carrier Collection in Cd/In-Based Dual Buffers in Kesterite Thin-Film Solar Cells from Nanoparticle Inks.

ABSTRACT: Increasing the power conversion efficiency (PCE) of kesterite Cu₂ZnSn(S,Se)₄ (CZTSSe) solar cells has remained challenging over the past decade, in part due to open-circuit voltage (V_OC)-limiting defect states at the absorber/buffer interface. Previously, we found that substituting the conventional CdS buffer layer with In₂S₃ in CZTSSe devices fabricated from nanoparticle inks produced an increase in the apparent doping density of the CZTSSe film and a higher built-in voltage arising from a more favorable energy-band alignment at the absorber/buffer interface. However, any associated gain in V_OC was negated by the introduction of photoactive defects at the interface. This present study incorporates a hybrid Cd/

SUBMITTER: Campbell S 

PROVIDER: S-EPMC10646902 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature