Enhance the Performance of CZTSSe Solar Cells Through Inhibiting the Cu, Tu, and (─COOH) Association Reaction.

The Sol-gel precursor solution reaction mechanism has a significant impact on the CuZnSn(S, Se) (CZTSSe) solar cells. It is discovered that in the CuZnSnS (CZTS) precursor solution (CZTS-PS) in the preparation, there is an association reaction among Cu, thiourea (Tu), and carboxyl (-COOH), which is an important reason for the undesirable CZTSSe solar cells. The strong association reaction generates excessive Cu ions, forming the CuSe secondary phase on the surface of the CZTSSe absorber.

Construction of a Low-Resistivity Carbon Layer To Improve Performance in Dimethyl Sulfoxide-Based Kesterite Solar Cells.

Morphology of the absorber plays a decisive role in photoelectric conversion efficiency (PCE) of kersterite solar cells. CuZnSn(S,Se) (CZTSSe) grain prepared from dimethyl sulfoxide (DMSO)-based solution easily grows into large grains, which can lead to the formation of some holes at the back of the absorber. These holes cause the recombination of photocarriers and greatly weaken the performance of CZTSSe devices.

Designing advanced S-scheme CdS QDs/La-BiWO photocatalysts for efficient degradation of RhB.

Finding effective strategies to design efficient photocatalysts and decompose refractory organic compounds in wastewater is a challenging problem. Herein, by coupling element doping and constructing heterostructures, S-scheme CdS QDs/La-BiWO (CS/LBWO) photocatalysts are designed and synthesized by a simple hydrothermal method. As a result, the RhB degradation efficiency of the optimized 5% CS/LBWO reached 99% within 70 min of illumination with excellent stability and recyclability.