LAUSR

Quantum dot solar cell (QDSC) is an attractive technology for commercialization owing to its various advantages like cost effectiveness and uses relatively simple device fabrication process. The properties of semiconductor quantum dots (QDs) such as band gap energy, optical absorption and carrier transportation can be effectively tuned by modulating their size and shape. Two types of architectures of QDSCs that have been developed; those are (i) photoelectric cell (PEC) fabrication by QDs sensitized on nanostructured metal oxide TiO2 and (ii) photovoltaic cells fabrication by a Schottky junction and heterojunction. The different types of semiconductor QDs such as a secondary, ternary, quaternary and perovskite of semiconductors are used for the advancement of QDSCs. The major challenge in QDSCs is the presence of defects in QDs which lead to recombination reactions and thereby limits the overall performance of the device. To tackle this problem several strategies such as an implementation of passivation layer over QDs layer, preparation of core-shell structures, etc. have been developed. This review covers the aspects of QDSCs, which are essential to understand for further improvement in this field and its commercialization.