研究目的

To understand the relations between properties, elements composition, material structures and synthesis methods, as well as devices architectures in order to propose strategies addressed to close the gap between actual and theoretical power conversion efficiencies of quantum dot solar cells.

研究成果

Despite the remarkable properties of quantum dots for light harvesting, current photovoltaic devices are far from their theoretical potential. Further investigation is needed to achieve efficient charge separation and extraction and to exploit hot carriers and multiple exciton generation through better device designs. The record conversion efficiency for a quantum dot based solar cell is 16.6%, achieved by a quantum dot sensitized solar cell. The performance of photovoltaic devices depends on material selection and device type, with PbX and CdX being the most applied materials despite their environmental concerns. There is still a long way to go in developing knowledge and technology about quantum dot solar cells.

研究不足

The current maximum efficiency of quantum dot solar cells is significantly lower than the theoretical limit. Challenges include efficient charge separation and extraction, exploitation of hot carriers and multiple exciton generation, and the environmental impact of toxic materials used in some quantum dots.