Quantum Dots Enable Perovskite Solar Cells Performance: Interactions, Mechanisms, Progresses, and Future Perspectives

Abstract Perovskite solar cells (PSCs) have gained attention as a promising photovoltaic technology, offering high efficiency and cost‐effective manufacturing. However, challenges related to stability, carrier dynamics, and defect passivation have limited their commercialization. Quantum dots (QDs) have recently gained attention as versatile materials that can enhance the performance of PSCs through multiple mechanisms. In this review, a comprehensive overview of the interaction between QDs and perovskite are provided. Also, their impact on influence on crystallization, defect passivation, photon management, energy level alignment, and device stability is examined. By modulating perovskite crystal growth, QDs reduce grain boundaries and improve film crystallinity, while passivating defects and regulating energy levels to suppress non‐radiative recombination and enhance charge extraction. QD layers can also improve light absorption and provide encapsulation against environmental factors like moisture and oxygen, thus extending device longevity. While QD‐optimized PSCs are promising, further breakthroughs will require new material designs and synergistic integration strategies. This review offers insights into the current advancements and highlights future research directions for maximizing the potential of QDs in PSC applications.