Abstract
In this work, high-performance four-terminal solution-processed tandem solar cells were fabricated by using dye-sensitized solar cells (DSSCs) as top-cells and lead sulfide (PbS) colloidal quantum ...
Highlights
In this work, high-performance four-terminal solution-processed tandem solar cells were fabricated by using dyesensitized solar cells (DSSCs) as top-cells and lead sulfide (PbS) colloidal quantum dot solar cells (CQDSCs) as bottom-cells
A PbS colloidal quantum dot solar cell (CQDSC) was first reported in 2005,12 and it achieved over 1% power conversion efficiency (PCE) in 2008 by K
The CdTe/PbS tandem solar cell has achieved over 9% PCE;[20] the PbS/PbS tandem structure approaches 9% by using the PbS Colloidal quantum dot (CQD) with a different band gap as subcells,[21,22] while a theoretical simulation has shown that a perovskite/PbS tandem structure can achieve 43% PCE.[19,23]
Summary
High-performance four-terminal solution-processed tandem solar cells were fabricated by using dyesensitized solar cells (DSSCs) as top-cells and lead sulfide (PbS) colloidal quantum dot solar cells (CQDSCs) as bottom-cells. It has been proven that increasing the number of junctions in a multijunction device is an efficient way to overcome the Shockley−Queisser limit, which is 33% PCE for a single junction device.[19] The PbS CQD has shown an excellent ability of harvesting the near-infrared spectrum, which allows researchers to use this material to fabricate bottom-cells for tandem structure devices.
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