Already, several technologies of polycrystalline thin‐film photovoltaic materials have
achieved certified record small‐cell power conversion efficiencies exceeding 22%. They are …

In the past tens of years, the power conversion efficiency of Cu (In, Ga) Se 2 (CIGS) has
continuously improved and been one of the fastest growing photovoltaic technologies that …

Chalcopyrite solar cells achieve efficiencies above 23%. The latest improvements are due to
post‐deposition treatments (PDT) with heavy alkalis. This study provides a comprehensive …

The properties and performance of polycrystalline materials depend critically on the
properties of their grain boundaries. Polycrystalline photovoltaic materials–eg hybrid halide …

The impact of a rubidium fluoride post deposition treatment (RbF‐PDT) on the material and
device properties of Cu (In, Ga) Se2 (CIGS) thin films and corresponding solar cells is …

Abstract Introducing K into Cu (In, Ga)(Se, S) 2 (CIGS) absorbers has led to recent world
record power conversion efficiencies for thin film polycrystalline solar cells. In this work, the …

The complicated and diverse deep defects, voids, and grain boundary in the CZTSSe
absorber are the main reasons for carrier recombination and efficiency degradation. The …

Heavy alkali metal treatment is a key factor to approach high efficiency in Cu (In, Ga) Se 2
(CIGS) solar cells. Here, we show that the Cs-induced surface modification on CIGS thin-film …

Recently, a world-record efficiency of 22.6% was achieved by applying a RbF
postdeposition treatment (PDT) on a Cu (In, Ga) Se2 (CIGSe) thin-film solar cell absorber …

Photovoltaic conversion efficiency of CuInSe2 solar cells is limited by low fill factor (FF) and
open‐circuit‐voltage (V OC) values compared to Si or perovskite solar cells. Herein, small …