Review of PbS Colloidal Quantum Dots Photovoltaic

The third generation photovoltaic devices based on solution-processed colloidal quantum dot (CQD) have particular advantage for harvesting sun's broad spectrum, because of the size tunability of CQD's bandgap. In the review, firstly, the fundamentals of solar cell and four key parameters were introduced. Secondly, evident deviations of CQD films from the homogenous bulk semiconductor were pointed out and the effects of CQD's properties on solar cell efficiency were analyzed. Finally, some main device architectures of PbS CQD solar cells developed in recent years were summarized. Advanced CQD thin films, more accurate exciton transport physical model, and better device architectures would help to improve the efficiency of CQD solar cells.