Work

Sb 2 Se 3 Thin Films for Doping the Absorber in CdTe Solar Cells

Year: 2025

Type: article

Abstract: ABSTRACT Nowadays, the primary efforts in CdTe solar cell research aim to find an alternative to copper doping among the group V elements. In fact, Cu has limited solubility in the CdTe grains, which prevents the achievement of higher open circuit voltages (Voc), and it is also a fast diffuser, considered the main factor of device degradation. Achieving effective doping with an alternative element could lead to improved Voc and, hence, cell efficiency, as well as increased stability. This study presents a novel method to dope CdSeTe/CdTe devices by depositing a thin Sb 2 Se 3 layer on top of the absorber. Sb is then driven inside the CdTe matrix by subsequent CdCl 2 treatment; the choice of Sb 2 Se 3 prevents the introduction of additional impurities. This method proves to be effective because Sb‐doped cells achieve efficiencies close to Cu‐doped ones. On the other hand, in accelerated stress tests without encapsulation, Sb‐containing devices are much more stable than Cu‐doped ones, showing the same noteworthy stability as undoped devices.

Source: Progress in Photovoltaics Research and Applications

DOI: 10.1002/pip.70037

Authors: Elisa Artegiani, Andrea Gasparotto, Sam Machin, Michael Walls, Alessandro Romeo

Institutions: University of Verona, University of Padua, Loughborough University

Language: English

Topic: Chalcogenide Semiconductor Thin Films

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $5,150