量子点太阳能电池中的能带工程与界面工程

Band and interface engineering for quantum dot solar cells

半导体量子点(quantum dots,QDs)凭借其优异的物理、化学特性在太阳能电池应用中受到广泛研究.在量子点太阳能电池(quantum dot solar cells,QDSCs)中,电荷分离效率和电荷收集效率低是影响器件光伏性能的两大关键因素.能带工程和界面工程对于加速光生电子空穴对分离、提高载流子收集效率,进而提高QDSCs性能具有重要意义.本文从材料、薄膜和器件多角度出发,综述了能带工程和界面工程在光伏性能优化方面的应用.首先,概述了QDs特性及QDSCs工作原理与器件结构;其次,结合国内外最新研究进展,阐述了能带工程和界面工程的常用策略及其在提高器件性能方面的具体作用;最后,总结了能带和界面问题的关联性,并对下一步研究方向进行了展望.

Semiconductor quantum dots(QDs) have received tremendous attention for solar cells owing to their excellent physical and chemical properties.In quantum dot solar cells(QDSCs),the low charge separation efficiency and low charge collection efficiency are two critical factors that greatly restrict their photovoltaic performance.Band engineering and interface engineering are of great significance for accelerating the separation of photogenerated electron-hole pairs and improving the efficiency of carrier collection to improve the performance of QDSCs.This article reviews the applications of band engineering and interfaces engineering for performance optimization from the perspectives of materials,films,and devices.Firstly,the features of QDs and the working principle and device structure of QDSCs are introduced.Secondly,based on the latest research progress of QDSCs,we overview the specific strategies of the band and interface engineering as well as their positive roles in improving the device performance.Finally,the correlation between band and interface issues and the further research direction of the band and interface engineering for QDSCs prospects are discussed.