高效率量子点中间带太阳电池的构建与实现

中间带太阳电池是为了充分利用太阳光谱中的红外光子能量而提出的一种高效率新概念太阳电池。介绍了中间带太阳电池的能量上转换原理、量子点中间带的物理优势、量子点中间带太阳电池的结构组态和理论转换效率。评述了它的近期研究进展,并提出了发展这种新概念太阳电池的若干技术对策,其中包括补偿量子点的积累应变、优化量子点的生长参数和选择新的量子点结构。最后指出,由于应变的补偿,有序量子点层的形成以及新量子点结构的采用使太阳电池的光伏性能得以有效改善。可以预期,具有高转换效率的量子点中间带太阳电池的构建与实现将会对未来的光伏技术与产业带来革命性的影响。

Construction and Achievement of High Efficient Quantum Dot Intermediate Band Solar Cells

In order to fully utilize the infrared photon energy in the solar radiation spectrum,the intermediate band solar cell as a efficient new concept solar cell is proposed.The energy up-coversion princlples of the intermediate band solar cell,physics feature of the quantum dot interme-diate band,configurations of the quantum dot intermediat band solar cell and its theoretical conversion efficiency are introduced.Its recent developments are also reviewed,and some technical strategies are suggested,including the compensation for the accumulation strains of quantum dots,optimization of the growth parameters and selection of the new quantum dot structures.The results indicate that because of the compensation of strains,formation of ordering quantum dot layers and employment of new quantum dot structures,the photovoltaic performance of solar cells can be significantlly improved.It can be expected that the construction and achievement of quantum dot intermediate band solar cells with high conversion efficiency and low cost will bring a revolutionary effect on the future photovoltaic technology and industry.